Linus Torvalds [Wed, 17 Dec 2014 19:59:04 +0000 (11:59 -0800)]
mmu_gather: fix over-eager tlb_flush_mmu_free() calling
Dave Hansen reports that commit
fb7332a9fedf ("mmu_gather: move minimal
range calculations into generic code") caused a performance problem:
"tlb_finish_mmu() goes up about 9x in the profiles (~0.4%->3.6%) and
tlb_flush_mmu_free() takes about 3.1% of CPU time with the patch
applied, but does not show up at all on the commit before"
and the reason is that Will moved the test for whether we need to flush
from tlb_flush_mmu() into tlb_flush_mmu_tlbonly(). But that meant that
tlb_flush_mmu_free() basically lost that check.
Move it back into tlb_flush_mmu() where it belongs, so that it covers
both tlb_flush_mmu_tlbonly() _and_ tlb_flush_mmu_free().
Reported-and-tested-by: Dave Hansen <dave@sr71.net>
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Linus Torvalds [Wed, 17 Dec 2014 19:52:37 +0000 (11:52 -0800)]
x86: mm: fix VM_FAULT_RETRY handling
My commit
26178ec11ef3 ("x86: mm: consolidate VM_FAULT_RETRY handling")
had a really stupid typo: the FAULT_FLAG_USER bit is in the 'flags'
variable, not the 'fault' variable. Duh,
The one silver lining in this is that Dave finding this at least
confirms that trinity actually triggers this special path easily, in a
way normal use does not.
Reported-by: Dave Jones <davej@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Linus Torvalds [Wed, 17 Dec 2014 18:44:22 +0000 (10:44 -0800)]
Merge tag 'vfio-v3.19-rc1' of git://github.com/awilliam/linux-vfio
Pull VFIO updates from Alex Williamson:
- s390 support (Frank Blaschka)
- Enable iommu-type1 for ARM SMMU (Will Deacon)
* tag 'vfio-v3.19-rc1' of git://github.com/awilliam/linux-vfio:
drivers/vfio: allow type-1 IOMMU instantiation on top of an ARM SMMU
vfio: make vfio run on s390
Linus Torvalds [Wed, 17 Dec 2014 18:37:56 +0000 (10:37 -0800)]
Merge tag 'virtio-next-for-linus' of git://git./linux/kernel/git/rusty/linux
Pull virtio updates from Rusty Russell:
"A balloon enhancement, and a minor race-on-module-unload theoretical
bug which doesn't merit cc: stable.
All the exciting stuff went via MST this cycle"
* tag 'virtio-next-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux:
virtio_balloon: free some memory from balloon on OOM
virtio_balloon: return the amount of freed memory from leak_balloon()
virtio_blk: fix race at module removal
virtio: Fix comment typo 'CONFIG_S_FAILED'
Linus Torvalds [Wed, 17 Dec 2014 18:16:27 +0000 (10:16 -0800)]
Merge branch 'next' of git://git./linux/kernel/git/rzhang/linux
Pull thermal management update from Zhang Rui:
"Summary:
- of-thermal extension to allow drivers to register and use its
functionality in a better way, without exploiting thermal core.
From Lukasz Majewski.
- Fix a bug in intel_soc_dts_thermal driver which calls a sleep
function in interrupt handler. From Maurice Petallo.
- add a thermal UAPI header file for exporting the thermal generic
netlink information to user-space. From Florian Fainelli.
- First round of refactoring in Exynos driver. Bartlomiej and Lukasz
are attempting to make it lean and easier to understand.
- New thermal driver for Rockchip (rk3288), with support for DT
thermal. From Caesar Wang.
- New thermal driver for Nvidia, Tegra124 SOCTHERM driver, with
support for DT thermal. From Mikko Perttunen.
- New cooling device, based on common clock framework. From Eduardo
Valentin.
- a couple of small fixes in thermal core framework. From Srinivas
Pandruvada, Javi Merino, Luis Henriques.
- Dropping Armada A375-Z1 SoC thermal support as the chip is not in
the market, armada folks decided to drop its support.
- a couple of small fixes and cleanups in int340x thermal driver"
* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux: (58 commits)
thermal: provide an UAPI header file
Thermal/int340x: Clear the error value of the last acpi_bus_get_device() call
thermal/powerclamp: add id for braswell cpu
thermal: Intel SoC DTS: Don't do thermal zone update inside spin_lock
Thermal: fix platform_no_drv_owner.cocci warnings
Thermal/int340x: avoid unnecessary pointer casting
thermal: int3403: Delete a check before thermal_zone_device_unregister()
thermal/int3400: export uuids
thermal: of: Extend current of-thermal.c code to allow setting emulated temp
thermal: of: Extend of-thermal to export table of trip points
thermal: of: Rename struct __thermal_trip to struct thermal_trip
thermal: of: Extend of-thermal.c to provide check if trip point is valid
thermal: of: Extend of-thermal.c to provide number of trip points
thermal: Fix error path in thermal_init()
thermal: lock the thermal zone when switching governors
thermal: core: ignore invalid trip temperature
thermal: armada: Remove support for A375-Z1 SoC
thermal: rockchip: add driver for thermal
dt-bindings: document Rockchip thermal
thermal: exynos: remove exynos_tmu_data.h include
...
Linus Torvalds [Wed, 17 Dec 2014 18:10:51 +0000 (10:10 -0800)]
Merge tag 'pwm/for-3.19-rc1' of git://git./linux/kernel/git/thierry.reding/linux-pwm
Pull pwm updates from Thierry Reding:
"There are two new drivers, one for the BCM2835 (Raspberry Pi) and one
used in conjunction with the LCD controller on various Atmel SoCs.
The Samsung PWM driver can now be built for 64-bit ARM (Exynos7).
A couple of fixes have been applied to the FTM PWM driver and system
sleep support was added"
* tag 'pwm/for-3.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm:
pwm: atmel-hlcdc: add at91sam9x5 and sama5d3 errata handling
pwm: ftm: Add Power Management support for FTM PWM
pwm: ftm: Add regmap rbtree type cache support
pwm: ftm: Correctly track usage count
pwm: samsung: Allow Samsung PWM driver to be enabled on Exynos7
pwm: add DT bindings documentation for atmel-hlcdc-pwm driver
pwm: add support for atmel-hlcdc-pwm device
pwm: Add BCM2835 PWM driver
Linus Torvalds [Wed, 17 Dec 2014 18:06:02 +0000 (10:06 -0800)]
Merge branch 'for-linus' of git://git./linux/kernel/git/dtor/input
Pull input subsystem updates from Dmitry Torokhov:
"Two new drivers for Elan hardware (for I2C touchpad and touchscreen
found in several Chromebooks and other devices), a driver for Goodix
touch panel, and small fixes to Cypress I2C trackpad and other input
drivers.
Also we switched to use __maybe_unused instead of gating suspend/
resume code with #ifdef guards to get better compile coverage"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input: (27 commits)
Input: gpio_keys - fix warning regarding uninitialized 'button' variable
Input: add support for Elan eKTH I2C touchscreens
Input: gpio_keys - fix warning regarding uninitialized 'irq' variable
Input: cyapa - use 'error' for error codes
Input: cyapa - fix resuming the device
Input: gpio_keys - add device tree support for interrupt only keys
Input: amikbd - allocate temporary keymap buffer on the stack
Input: amikbd - fix build if !CONFIG_HW_CONSOLE
Input: lm8323 - missing error check in lm8323_set_disable()
Input: initialize device counter variables with -1
Input: initialize input_no to -1 to avoid subtraction
Input: i8042 - do not try to load on Intel NUC D54250WYK
Input: atkbd - correct MSC_SCAN events for force_release keys
Input: cyapa - switch to using managed resources
Input: lifebook - use "static inline" instead of "inline" in lifebook.h
Input: touchscreen - use __maybe_unused instead of ifdef around suspend/resume
Input: mouse - use __maybe_unused instead of ifdef around suspend/resume
Input: misc - use __maybe_unused instead of ifdef around suspend/resume
Input: cap11xx - support for irq-active-high option
Input: cap11xx - add support for various cap11xx devices
...
Linus Torvalds [Wed, 17 Dec 2014 17:59:26 +0000 (09:59 -0800)]
Merge tag 'for-linus-
20141215' of git://git.infradead.org/linux-mtd
Pull MTD updates from Brian Norris:
"Summary:
- Add device tree support for DoC3
- SPI NOR:
Refactoring, for better layering between spi-nor.c and its
driver users (e.g., m25p80.c)
New flash device support
Support 6-byte ID strings
- NAND:
New NAND driver for Allwinner SoC's (sunxi)
GPMI NAND: add support for raw (no ECC) access, for testing
purposes
Add ATO manufacturer ID
A few odd driver fixes
- MTD tests:
Allow testers to compensate for OOB bitflips in oobtest
Fix a torturetest regression
- nandsim: Support longer ID byte strings
And more"
* tag 'for-linus-
20141215' of git://git.infradead.org/linux-mtd: (63 commits)
mtd: tests: abort torturetest on erase errors
mtd: physmap_of: fix potential NULL dereference
mtd: spi-nor: allow NULL as chip name and try to auto detect it
mtd: nand: gpmi: add raw oob access functions
mtd: nand: gpmi: add proper raw access support
mtd: nand: gpmi: add gpmi_copy_bits function
mtd: spi-nor: factor out write_enable() for erase commands
mtd: spi-nor: add support for s25fl128s
mtd: spi-nor: remove the jedec_id/ext_id
mtd: spi-nor: add id/id_len for flash_info{}
mtd: nand: correct the comment of function nand_block_isreserved()
jffs2: Drop bogus if in comment
mtd: atmel_nand: replace memcpy32_toio/memcpy32_fromio with memcpy
mtd: cafe_nand: drop duplicate .write_page implementation
mtd: m25p80: Add support for serial flash Spansion S25FL132K
MTD: m25p80: fix inconsistency in m25p_ids compared to spi_nor_ids
mtd: spi-nor: improve wait-till-ready timeout loop
mtd: delete unnecessary checks before two function calls
mtd: nand: omap: Fix NAND enumeration on 3430 LDP
mtd: nand: add ATO manufacturer info
...
Linus Torvalds [Wed, 17 Dec 2014 17:54:05 +0000 (09:54 -0800)]
Merge tag 'microblaze-3.19-rc1' of git://git.monstr.eu/linux-2.6-microblaze
Pull Microblaze fix from Michal Simek:
"Fix mmap for cache coherent memory"
* tag 'microblaze-3.19-rc1' of git://git.monstr.eu/linux-2.6-microblaze:
microblaze: Fix mmap for cache coherent memory
Linus Torvalds [Wed, 17 Dec 2014 17:52:49 +0000 (09:52 -0800)]
Merge branch 'for-linus' of git://git./linux/kernel/git/jmorris/linux-security
Pull security subsystem fixes from James Morris.
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security:
KEYS: remove a bogus NULL check
ima: Fix build failure on powerpc when TCG_IBMVTPM dependencies are not met
KEYS: Fix stale key registration at error path
Linus Torvalds [Wed, 17 Dec 2014 17:41:32 +0000 (09:41 -0800)]
Merge branch 'for-linus' of git://git./linux/kernel/git/mszeredi/fuse
Pull fuse update from Miklos Szeredi:
"The first part makes sure we don't hold up umount with pending async
requests. In addition to being a cleanup, this is a small behavioral
change (for the better) and unlikely to break anything.
The second part prepares for a cleanup of the fuse device I/O code by
adding a helper for simple request submission, with some savings in
line numbers already realized"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse:
fuse: use file_inode() in fuse_file_fallocate()
fuse: introduce fuse_simple_request() helper
fuse: reduce max out args
fuse: hold inode instead of path after release
fuse: flush requests on umount
fuse: don't wake up reserved req in fuse_conn_kill()
Lars-Peter Clausen [Wed, 3 Dec 2014 15:07:28 +0000 (16:07 +0100)]
microblaze: Fix mmap for cache coherent memory
When running in non-cache coherent configuration the memory that was
allocated with dma_alloc_coherent() has a custom mapping and so there is no
1-to-1 relationship between the kernel virtual address and the PFN. This
means that virt_to_pfn() will not work correctly for those addresses and the
default mmap implementation in the form of dma_common_mmap() will map some
random, but not the requested, memory area.
Fix this by providing a custom mmap implementation that looks up the PFN
from the page table rather than using virt_to_pfn.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Linus Torvalds [Tue, 16 Dec 2014 23:53:03 +0000 (15:53 -0800)]
Merge branch 'for-linus' of git://git./linux/kernel/git/viro/vfs
Pull vfs pile #2 from Al Viro:
"Next pile (and there'll be one or two more).
The large piece in this one is getting rid of /proc/*/ns/* weirdness;
among other things, it allows to (finally) make nameidata completely
opaque outside of fs/namei.c, making for easier further cleanups in
there"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
coda_venus_readdir(): use file_inode()
fs/namei.c: fold link_path_walk() call into path_init()
path_init(): don't bother with LOOKUP_PARENT in argument
fs/namei.c: new helper (path_cleanup())
path_init(): store the "base" pointer to file in nameidata itself
make default ->i_fop have ->open() fail with ENXIO
make nameidata completely opaque outside of fs/namei.c
kill proc_ns completely
take the targets of /proc/*/ns/* symlinks to separate fs
bury struct proc_ns in fs/proc
copy address of proc_ns_ops into ns_common
new helpers: ns_alloc_inum/ns_free_inum
make proc_ns_operations work with struct ns_common * instead of void *
switch the rest of proc_ns_operations to working with &...->ns
netns: switch ->get()/->put()/->install()/->inum() to working with &net->ns
make mntns ->get()/->put()/->install()/->inum() work with &mnt_ns->ns
common object embedded into various struct ....ns
Linus Torvalds [Tue, 16 Dec 2014 23:46:01 +0000 (15:46 -0800)]
Merge branch 'for_linus' of git://git./linux/kernel/git/jack/linux-fs
Pull isofs and reiserfs fixes from Jan Kara:
"A reiserfs and an isofs fix. They arrived after I sent you my first
pull request and I don't want to delay them unnecessarily till rc2"
* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs:
isofs: Fix infinite looping over CE entries
reiserfs: destroy allocated commit workqueue
Linus Torvalds [Tue, 16 Dec 2014 23:25:31 +0000 (15:25 -0800)]
Merge branch 'for-3.19' of git://linux-nfs.org/~bfields/linux
Pull nfsd updates from Bruce Fields:
"A comparatively quieter cycle for nfsd this time, but still with two
larger changes:
- RPC server scalability improvements from Jeff Layton (using RCU
instead of a spinlock to find idle threads).
- server-side NFSv4.2 ALLOCATE/DEALLOCATE support from Anna
Schumaker, enabling fallocate on new clients"
* 'for-3.19' of git://linux-nfs.org/~bfields/linux: (32 commits)
nfsd4: fix xdr4 count of server in fs_location4
nfsd4: fix xdr4 inclusion of escaped char
sunrpc/cache: convert to use string_escape_str()
sunrpc: only call test_bit once in svc_xprt_received
fs: nfsd: Fix signedness bug in compare_blob
sunrpc: add some tracepoints around enqueue and dequeue of svc_xprt
sunrpc: convert to lockless lookup of queued server threads
sunrpc: fix potential races in pool_stats collection
sunrpc: add a rcu_head to svc_rqst and use kfree_rcu to free it
sunrpc: require svc_create callers to pass in meaningful shutdown routine
sunrpc: have svc_wake_up only deal with pool 0
sunrpc: convert sp_task_pending flag to use atomic bitops
sunrpc: move rq_cachetype field to better optimize space
sunrpc: move rq_splice_ok flag into rq_flags
sunrpc: move rq_dropme flag into rq_flags
sunrpc: move rq_usedeferral flag to rq_flags
sunrpc: move rq_local field to rq_flags
sunrpc: add a generic rq_flags field to svc_rqst and move rq_secure to it
nfsd: minor off by one checks in __write_versions()
sunrpc: release svc_pool_map reference when serv allocation fails
...
Linus Torvalds [Tue, 16 Dec 2014 22:53:01 +0000 (14:53 -0800)]
Merge tag 'iommu-config-for-linus' of git://git./linux/kernel/git/arm/arm-soc
Pull ARM SoC/iommu configuration update from Arnd Bergmann:
"The iomm-config branch contains work from Will Deacon, quoting his
description:
This series adds automatic IOMMU and DMA-mapping configuration for
OF-based DMA masters described using the generic IOMMU devicetree
bindings. Although there is plenty of future work around splitting up
iommu_ops, adding default IOMMU domains and sorting out automatic IOMMU
group creation for the platform_bus, this is already useful enough for
people to port over their IOMMU drivers and start using the new probing
infrastructure (indeed, Marek has patches queued for the Exynos IOMMU).
The branch touches core ARM and IOMMU driver files, and the respective
maintainers (Russell King and Joerg Roedel) agreed to have the
contents merged through the arm-soc tree.
The final version was ready just before the merge window, so we ended
up delaying it a bit longer than the rest, but we don't expect to see
regressions because this is just additional infrastructure that will
get used in drivers starting in 3.20 but is unused so far"
* tag 'iommu-config-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc:
iommu: store DT-probed IOMMU data privately
arm: dma-mapping: plumb our iommu mapping ops into arch_setup_dma_ops
arm: call iommu_init before of_platform_populate
dma-mapping: detect and configure IOMMU in of_dma_configure
iommu: fix initialization without 'add_device' callback
iommu: provide helper function to configure an IOMMU for an of master
iommu: add new iommu_ops callback for adding an OF device
dma-mapping: replace set_arch_dma_coherent_ops with arch_setup_dma_ops
iommu: provide early initialisation hook for IOMMU drivers
Linus Torvalds [Tue, 16 Dec 2014 22:26:26 +0000 (14:26 -0800)]
Merge tag 'dt2-for-linus' of git://git./linux/kernel/git/arm/arm-soc
Pull ARM SoC DT updates part 2 from Arnd Bergmann:
"This is a follow-up to the early ARM SoC DT changes, with additional
content that has external dependencies:
- The Tegra IOMMU DT support depends on changes from the iommu tree,
plus the contents of the arm-soc drivers branch
- The MVEBU PHY support depends on changes from the phy tree
- The AT91 DT support depends on changes from the RTC and DMA-slave
trees
All of these changes just enable additional devices for existing
platforms"
* tag 'dt2-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc:
ARM: tegra: Enable IOMMU for display controllers on Tegra124
ARM: tegra: Enable IOMMU for display controllers on Tegra114
ARM: tegra: Enable IOMMU for display controllers on Tegra30
ARM: tegra: Add memory controller support for Tegra124
ARM: tegra: Add memory controller support for Tegra114
ARM: tegra: Add memory controller support for Tegra30
ARM: tegra: Add APB_MISC_GP as a MIPI pad control bank
ARM: mvebu: add PHY support to the dts for the USB controllers on Armada 375
ARM: mvebu: add Device Tree description of USB cluster controller on Armada 375
ARM: at91/dt: at91sam9g45: add ISI node
ARM: at91/dt: enable the RTT block on the at91sam9m10g45ek board
ARM: at91/dt: enable the RTT block on the sam9g20ek board
ARM: at91/dt: add GPBR nodes
ARM: at91/dt: add RTT nodes to at91 dtsis
ARM: at91/dt: at91sam9rl: add rtc
ARM: at91: fix GPLv2 wording
ARM: at91/dt: sama5d4: add DMA support
ARM: at91/dt: sama5d4: use macro instead of numeric value
Linus Torvalds [Tue, 16 Dec 2014 22:17:36 +0000 (14:17 -0800)]
Merge tag 'fixes-for-linus' of git://git./linux/kernel/git/arm/arm-soc
Pull ARM SoC fixes from Arnd Bergmann:
"Here are the first arm-soc bug fixes. Most of these are OMAP related
fixes for regressions or minor bugs. Aside from that, there are a few
defconfig changes for various platforms"
* tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc:
iommu/exynos: Fix arm64 allmodconfig build
ARM: defconfigs: use CONFIG_CPUFREQ_DT
ARM: omap2plus_defconfig: Enable AHCI_PLATFORM driver
ARM: dts: am437x-sk-evm.dts: fix LCD timings
ARM: dts: dra7-evm: Update SMPS7 (VDD_CORE) max voltage to match DM
ARM: dts: dra7-evm: Fix typo in SMPS6 (VDD_GPU) max voltage
ARM: OMAP2+: AM43x: Add ID for ES1.2
ARM: dts: am437x-sk: fix lcd enable pin mux data
ARM: dts: Fix gpmc regression for omap 2430sdp smc91x
Revert "ARM: shmobile: multiplatform: add Audo DMAC peri peri support on defconfig"
ARM: dts: dra7: fix DSS PLL clock mux registers
ARM: dts: DRA7: wdt: Fix compatible property for watchdog node
ARM: OMAP2+: clock: remove unused function prototype
Linus Torvalds [Tue, 16 Dec 2014 22:12:33 +0000 (14:12 -0800)]
Merge tag 'arm64-fixes' of git://git./linux/kernel/git/arm64/linux
Pull arm64 fixes from Will Deacon:
"Given that my availability next week is likely to be poor, here are
three arm64 fixes to resolve some issues introduced by features merged
last week. I was going to wait until -rc1, but it doesn't make much
sense to sit on fixes.
Fix some fallout introduced during the merge window:
- Build failure when PM_SLEEP is disabled but CPU_IDLE is enabled
- Compiler warning from page table dumper w/ 48-bit VAs
- Erroneous page table truncation in reported dump"
* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
arm64: mm: dump: don't skip final region
arm64: mm: dump: fix shift warning
arm64: psci: Fix build breakage without PM_SLEEP
Linus Torvalds [Tue, 16 Dec 2014 22:08:53 +0000 (14:08 -0800)]
Merge tag 'xtensa-next-
20141215' of git://github.com/czankel/xtensa-linux
Pull Xtensa fixes from Chris Zankel:
- fix nommu support
- remove s6000 variant and s6105 platform
- fix permissions for kmapped pages so that copy_to_user_page works with them
- add power management menu to Kconfig to allow use of runtime PM
- disable linker optimizations because of a linker bug
- fix sparse error
* tag 'xtensa-next-
20141215' of git://github.com/czankel/xtensa-linux:
xtensa: disable link optimization
xtensa/uaccess: fix sparse errors
xtensa: fix kmap_prot definition
xtensa: add power management menu to Kconfig
xtensa: remove s6000 variant and s6105 platform
xtensa: make PLATFORM_DEFAULT_MEM parameters configurable
xtensa: nommu: clean up memory map dump
xtensa: nommu: reserve memory below PLATFORM_DEFAULT_MEM_START
xtensa: nommu: set up cache and atomctl in initialize_mmu
xtensa: move vecbase SR initialization to _startup
xtensa: nommu: fix uImage load address
xtensa: nommu: fix load address definitions
xtensa: nommu: fix Image.elf reset code and ld script
xtensa: nommu: add MMU dependency to DEBUG_TLB_SANITY
xtensa: nommu: don't build most of the cache flushing code
xtensa: nommu: don't provide arch_get_unmapped_area
xtensa: nommu: provide MAP_UNINITIALIZED definition
xtensa: nommu: provide _PAGE_CHG_MASK definition
xtensa: nommu: provide __invalidate_dcache_page_alias stub
xtensa: nommu: move init_mmu stub to nommu_context.h
Linus Torvalds [Tue, 16 Dec 2014 21:54:16 +0000 (13:54 -0800)]
Merge git://git./linux/kernel/git/cmetcalf/linux-tile
Pull arch/tile updates from Chris Metcalf:
"Note that one of the changes converts my old cmetcalf@tilera.com email
in MAINTAINERS to the cmetcalf@ezchip.com email that you see on this
email"
* git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile:
arch/tile: update MAINTAINERS email to EZchip
tile: avoid undefined behavior with regs[TREG_TP] etc
arch: tile: kernel: kgdb.c: Use memcpy() instead of pointer copy one by one
tile: Use the more common pr_warn instead of pr_warning
arch: tile: gxio: Export symbols for module using in 'mpipe.c'
arch: tile: kernel: signal.c: Use __copy_from/to_user() instead of __get/put_user()
Linus Torvalds [Tue, 16 Dec 2014 21:23:03 +0000 (13:23 -0800)]
Merge tag 'stable/for-linus-3.19-rc0b-tag' of git://git./linux/kernel/git/xen/tip
Pull additional xen update from David Vrabel:
"Xen: additional features for 3.19-rc0
- Linear p2m for x86 PV guests which simplifies the p2m code,
improves performance and will allow for > 512 GB PV guests in the
future.
A last-minute, configuration specific issue was discovered with this
change which is why it was not included in my previous pull request.
This is now been fixed and tested"
* tag 'stable/for-linus-3.19-rc0b-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
xen: switch to post-init routines in xen mmu.c earlier
Revert "swiotlb-xen: pass dev_addr to swiotlb_tbl_unmap_single"
xen: annotate xen_set_identity_and_remap_chunk() with __init
xen: introduce helper functions to do safe read and write accesses
xen: Speed up set_phys_to_machine() by using read-only mappings
xen: switch to linear virtual mapped sparse p2m list
xen: Hide get_phys_to_machine() to be able to tune common path
x86: Introduce function to get pmd entry pointer
xen: Delay invalidating extra memory
xen: Delay m2p_override initialization
xen: Delay remapping memory of pv-domain
xen: use common page allocation function in p2m.c
xen: Make functions static
xen: fix some style issues in p2m.c
Linus Torvalds [Tue, 16 Dec 2014 21:15:12 +0000 (13:15 -0800)]
Merge tag 'linux-kselftest-3.19-rc1' of git://git./linux/kernel/git/shuah/linux-kselftest
Pull kselftest update from Shuah Khan:
"kselftest updates for 3.19-rc1:
- kcmp test include file cleanup
- kcmp change to build on all architectures
- A light weight kselftest framework that provides a set of
interfaces for tests to use to report results. In addition,
several tests are updated to use the framework.
- A new runtime system size test that prints the amount of RAM that
the currently running system is using"
* tag 'linux-kselftest-3.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest:
selftest: size: Add size test for Linux kernel
selftests/kcmp: Always try to build the test
selftests/kcmp: Don't include kernel headers
kcmp: Move kcmp.h into uapi
selftests/timers: change test to use ksft framework
selftests/kcmp: change test to use ksft framework
selftests/ipc: change test to use ksft framework
selftests/breakpoints: change test to use ksft framework
selftests: add kselftest framework for uniform test reporting
selftests/user: move test out of Makefile into a shell script
selftests/net: move test out of Makefile into a shell script
Linus Torvalds [Tue, 16 Dec 2014 20:53:59 +0000 (12:53 -0800)]
Merge tag 'trace-3.19-2' of git://git./linux/kernel/git/rostedt/linux-trace
Pull tracing updates from Steven Rostedt:
"As the merge window is still open, and this code was not as complex as
I thought it might be. I'm pushing this in now.
This will allow Thomas to debug his irq work for 3.20.
This adds two new features:
1) Allow traceopoints to be enabled right after mm_init().
By passing in the trace_event= kernel command line parameter,
tracepoints can be enabled at boot up. For debugging things like
the initialization of interrupts, it is needed to have tracepoints
enabled very early. People have asked about this before and this
has been on my todo list. As it can be helpful for Thomas to debug
his upcoming 3.20 IRQ work, I'm pushing this now. This way he can
add tracepoints into the IRQ set up and have users enable them when
things go wrong.
2) Have the tracepoints printed via printk() (the console) when they
are triggered.
If the irq code locks up or reboots the box, having the tracepoint
output go into the kernel ring buffer is useless for debugging.
But being able to add the tp_printk kernel command line option
along with the trace_event= option will have these tracepoints
printed as they occur, and that can be really useful for debugging
early lock up or reboot problems.
This code is not that intrusive and it passed all my tests. Thomas
tried them out too and it works for his needs.
Link: http://lkml.kernel.org/r/20141214201609.126831471@goodmis.org"
* tag 'trace-3.19-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
tracing: Add tp_printk cmdline to have tracepoints go to printk()
tracing: Move enabling tracepoints to just after rcu_init()
Arnd Bergmann [Tue, 16 Dec 2014 20:43:15 +0000 (21:43 +0100)]
Merge tag 'renesas-defconfig-fixes-for-v3.19' of git://git./linux/kernel/git/horms/renesas into fixes
Pull "Renesas ARM Based SoC Defconfig Fixes for v3.19" from Simon Horman:
* Revert change enabling RCAR_AUDMAC_PP in shmobile_defconfig
Unfortunately enabling RCAR_AUDMAC_PP support this patch breaks dmaengine
support on R-Car Gen2 boards. This should be resolved by driver updates
in v3.20. But v3.19 was too early for this defconfig change.
* tag 'renesas-defconfig-fixes-for-v3.19' of git://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas:
Revert "ARM: shmobile: multiplatform: add Audo DMAC peri peri support on defconfig"
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Mark Brown [Mon, 15 Dec 2014 15:54:42 +0000 (15:54 +0000)]
iommu/exynos: Fix arm64 allmodconfig build
The Exynos IOMMU driver uses the ARM specific dmac_flush_range() and
outer_flush_range() functions. This breaks the build on arm64 allmodconfig
in -next since support has been merged for some Exynos ARMv8 SoCs. Add a
dependency on ARM to keep things building until either the driver has the
ARM dependencies removed or the ARMv8 architecture code implements these
ARM specific APIs.
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Chris Zankel [Tue, 16 Dec 2014 05:22:21 +0000 (21:22 -0800)]
xtensa: disable link optimization
The default linker behavior is to optimize identical literal values
and remove unnecessary overhead. However, because of a bug in the
linker, this currently results in an error ('call target out of range').
Disable link-time optimizations per default until there is a fix
for the linker and add the option to iss_defconfig.
Signed-off-by: Chris Zankel <chris@zankel.net>
Dan Carpenter [Thu, 11 Dec 2014 19:59:38 +0000 (19:59 +0000)]
KEYS: remove a bogus NULL check
We already checked if "desc" was NULL at the beginning of the function
and we've dereferenced it so this causes a static checker warning.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: James Morris <james.l.morris@oracle.com>
Dmitry Torokhov [Tue, 16 Dec 2014 04:32:42 +0000 (20:32 -0800)]
Merge branch 'next' into for-linus
Prepare input updates for 3.19.
Michael S. Tsirkin [Sun, 14 Dec 2014 16:53:10 +0000 (18:53 +0200)]
xtensa/uaccess: fix sparse errors
virtio wants to read bitwise types from userspace using get_user. At the
moment this triggers sparse errors, since the value is passed through an
integer.
Fix that up using __force.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Chris Zankel <chris@zankel.net>
Chris Zankel [Tue, 16 Dec 2014 04:10:39 +0000 (20:10 -0800)]
Merge tag 'xtensa-for-next-
20141213' of git://github.com/jcmvbkbc/linux-xtensa into for_next
Xtensa improvements for 3.19:
- fix permissions for kmapped pages so that copy_to_user_page works with
them;
- add power management menu to Kconfig to allow use of runtime PM.
Chris Zankel [Tue, 16 Dec 2014 04:09:06 +0000 (20:09 -0800)]
Merge tag 'v3.18' into for_next
Linux 3.18
Linus Torvalds [Tue, 16 Dec 2014 02:28:25 +0000 (18:28 -0800)]
Merge branch 'for-next' of git://git./linux/kernel/git/cooloney/linux-leds
Pull LED subsystem update from Bryan Wu:
"We got some cleanup and driver for LP8860 as well as some patches for
LED Flash Class"
* 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/linux-leds:
leds: lp8860: Fix module dependency
leds: lp8860: Introduce TI lp8860 4 channel LED driver
leds: Add support for setting brightness in a synchronous way
leds: implement sysfs interface locking mechanism
leds: syscon: handle multiple syscon instances
leds: delete copy/paste mistake
leds: regulator: Convert to devm_regulator_get_exclusive
Linus Torvalds [Tue, 16 Dec 2014 02:06:13 +0000 (18:06 -0800)]
Merge tag 'staging-3.19-rc1' of git://git./linux/kernel/git/gregkh/staging
Pull staging driver updates from Greg KH:
"Here's the big staging tree pull request for 3.19-rc1.
We continued to delete more lines than were added, always a good
thing, but not at a huge rate this release, only about 70k lines
removed overall mostly from removing the horrid bcm driver.
Lots of normal staging driver cleanups and fixes all over the place,
well over a thousand of them, the shortlog shows all the horrid
details.
The "contentious" thing here is the movement of the Android binder
code out of staging into the "real" part of the kernel. This is code
that has been stable for a few years now and is working as-is in the
tens of millions of devices with no issues. Yes, the code is horrid,
and the userspace api leaves a lot to be desired, but it's not going
to change due to legacy issues that we have no control over. Because
so many devices and companies rely on this, and the code is stable,
might as well promote it out of staging.
This was all discussed at the Linux Plumbers conference, and everyone
participating agreed that this was the best way forward.
There is work happening to replace the binder code with something new
that is happening right now, but I don't expect to see the results of
that work for another year at the earliest. If that ever happens, and
Android switches over to it, I'll gladly remove this version.
As for maintainers, I'll be glad to maintain this code, I've been
doing it for the past few years with no problems. I'll send a
MAINTAINERS entry for it before 3.19-final is out, still need to talk
to the Google developers about if they are willing to help with it or
not, last I checked they were, which was good.
All of these patches have been in linux-next for a while with no
reported issues"
* tag 'staging-3.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging: (1382 commits)
Staging: slicoss: Fix long line issues in slicoss.c
staging: rtl8712: remove unnecessary else after return
staging: comedi: change some printk calls to pr_err
staging: rtl8723au: hal: Removed the extra semicolon
lustre: Deletion of unnecessary checks before three function calls
staging: lustre: fix sparse warnings: static function declaration
staging: lustre: fixed sparse warnings related to static declarations
staging: unisys: remove duplicate header
staging: unisys: remove unneeded structure
staging: ft1000 : replace __attribute ((__packed__) with __packed
drivers: staging: rtl8192e: Include "asm/unaligned.h" instead of "access_ok.h" in "rtl819x_BAProc.c"
Drivers:staging:rtl8192e: Fixed checkpatch warning
Drivers:staging:clocking-wizard: Added a newline
staging: clocking-wizard: check for a valid clk_name pointer
staging: rtl8723au: Hal_InitPGData() avoid unnecessary typecasts
staging: rtl8723au: _DisableAnalog(): Avoid zero-init variables unnecessarily
staging: rtl8723au: Remove unnecessary wrapper _ResetDigitalProcedure1()
staging: rtl8723au: _ResetDigitalProcedure1_92C() reduce code obfuscation
staging: rtl8723au: Remove unnecessary wrapper _DisableRFAFEAndResetBB()
staging: rtl8723au: _DisableRFAFEAndResetBB8192C(): Reduce code obfuscation
...
James Morris [Tue, 16 Dec 2014 01:49:10 +0000 (12:49 +1100)]
Merge branch 'next' of git://git./linux/kernel/git/zohar/linux-integrity into for-linus
Linus Torvalds [Tue, 16 Dec 2014 01:40:28 +0000 (17:40 -0800)]
Merge tag 'firewire-updates' of git://git./linux/kernel/git/ieee1394/linux1394
Pull firewire updates from Stefan Richter:
"IEEE 1394 subsystem updates:
- clean up firewire-ohci's longlived vm-mapping
- use target instance lock instead of core lock in firewire-sbp2"
* tag 'firewire-updates' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394:
firewire: sbp2: replace card lock by target lock
firewire: sbp2: replace some spin_lock_irqsave by spin_lock_irq
firewire: sbp2: protect a reference counter properly
firewire: core: document fw_csr_string's truncation of long strings
firewire: ohci: replace vm_map_ram() with vmap()
Linus Torvalds [Tue, 16 Dec 2014 01:36:45 +0000 (17:36 -0800)]
Merge tag 'for-v3.19' of git://git.infradead.org/battery-2.6
Pull power supply updates from Sebastian Reichel::
"Power supply and reset changes for the v3.19 series
- update power/reset drivers to use kernel restart handler
- add power off driver for i.mx6
- add DT support for gpio-charger"
* tag 'for-v3.19' of git://git.infradead.org/battery-2.6:
power: reset: adjust priority of simple syscon reboot driver
power: ds2782_battery: Simplify the PM hooks
power/reset: brcmstb: Register with kernel restart handler
power/reset: hisi: Register with kernel restart handler
power/reset: keystone: Register with kernel restart handler
power/reset: axxia: Register with kernel restart handler
power/reset: xgene: Register with kernel restart handler
power/reset: xgene: Use mdelay instead of jiffies based timeout
power/reset: xgene: Use local variable dev instead of pdev->dev
power/reset: xgene: Drop devm_kfree
power/reset: xgene: Return -ENOMEM if out of memory
power/reset: vexpress: Register with kernel restart handler
power: reset: imx-snvs-poweroff: add power off driver for i.mx6
power: gpio-charger: add device tree support
dt-bindings: document gpio-charger bindings
Linus Torvalds [Tue, 16 Dec 2014 01:33:47 +0000 (17:33 -0800)]
Merge tag 'hsi-for-3.19' of git://git./linux/kernel/git/sre/linux-hsi
Pull HSI update from Sebastian Reichel:
"Misc fixes in omap-ssi and nokia-modem drivers"
* tag 'hsi-for-3.19' of git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-hsi:
HSI: nokia-modem: fix error handling of irq_of_parse_and_map
HSI: nokia-modem: setup default value for pm parameter
HSI: omap_ssi_port: Don't print uninitialized err
HSI: remove deprecated IRQF_DISABLED
Linus Torvalds [Tue, 16 Dec 2014 01:30:09 +0000 (17:30 -0800)]
Merge branch 'irq-irqdomain-arm-for-linus' of git://git./linux/kernel/git/tip/tip
Pull irq domain ARM updates from Thomas Gleixner:
"This set of changes make use of hierarchical irqdomains to provide:
- MSI/ITS support for GICv3
- MSI support for GICv2m
- Interrupt polarity extender for GICv1
Marc has come more cleanups for the existing extension hooks of GIC in
the pipeline, but they are going to be 3.20 material"
* 'irq-irqdomain-arm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (22 commits)
irqchip: gicv3-its: Fix ITT allocation
irqchip: gicv3-its: Move some alloc/free code to activate/deactivate
irqchip: gicv3-its: Fix domain free in multi-MSI case
irqchip: gic: Remove warning by including linux/irqdomain.h
irqchip: gic-v2m: Add DT bindings for GICv2m
irqchip: gic-v2m: Add support for ARM GICv2m MSI(-X) doorbell
irqchip: mtk-sysirq: dt-bindings: Add bindings for mediatek sysirq
irqchip: mtk-sysirq: Add sysirq interrupt polarity support
irqchip: gic: Support hierarchy irq domain.
irqchip: GICv3: Binding updates for ITS
irqchip: GICv3: ITS: enable compilation of the ITS driver
irqchip: GICv3: ITS: plug ITS init into main GICv3 code
irqchip: GICv3: ITS: DT probing and initialization
irqchip: GICv3: ITS: MSI support
irqchip: GICv3: ITS: device allocation and configuration
irqchip: GICv3: ITS: tables allocators
irqchip: GICv3: ITS: LPI allocator
irqchip: GICv3: ITS: irqchip implementation
irqchip: GICv3: ITS command queue
irqchip: GICv3: rework redistributor structure
...
Linus Torvalds [Tue, 16 Dec 2014 01:25:20 +0000 (17:25 -0800)]
Merge branch 'for-linus' of git://git.kernel.dk/linux-block
Pull core block fix from Jens Axboe:
"Jan reported a problem this morning with a crash in blk-mq, and after
looking over the recent changes, it's obvious that the blk-mq-tag
waitqueue handling change is buggy. We could end up _not_ doing
finish_wait() before switching to a new waitqueue, thus corrupting the
wait task list"
* 'for-linus' of git://git.kernel.dk/linux-block:
Revert "blk-mq: Micro-optimize bt_get()"
Linus Torvalds [Tue, 16 Dec 2014 01:07:58 +0000 (17:07 -0800)]
Merge tag 'rpmsg-3.19-next' of git://git./linux/kernel/git/ohad/rpmsg
Pull rpmsg update from Ohad Ben-Cohen:
"A single patch from Suman Anna which makes rpmsg use less buffers when
small vrings are being used"
* tag 'rpmsg-3.19-next' of git://git.kernel.org/pub/scm/linux/kernel/git/ohad/rpmsg:
rpmsg: use less buffers when vrings are small
Linus Torvalds [Mon, 15 Dec 2014 23:52:01 +0000 (15:52 -0800)]
Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux
Pull drm updates from Dave Airlie:
"Highlights:
- AMD KFD driver merge
This is the AMD HSA interface for exposing a lowlevel interface for
GPGPU use. They have an open source userspace built on top of this
interface, and the code looks as good as it was going to get out of
tree.
- Initial atomic modesetting work
The need for an atomic modesetting interface to allow userspace to
try and send a complete set of modesetting state to the driver has
arisen, and been suffering from neglect this past year. No more,
the start of the common code and changes for msm driver to use it
are in this tree. Ongoing work to get the userspace ioctl finished
and the code clean will probably wait until next kernel.
- DisplayID 1.3 and tiled monitor exposed to userspace.
Tiled monitor property is now exposed for userspace to make use of.
- Rockchip drm driver merged.
- imx gpu driver moved out of staging
Other stuff:
- core:
panel - MIPI DSI + new panels.
expose suggested x/y properties for virtual GPUs
- i915:
Initial Skylake (SKL) support
gen3/4 reset work
start of dri1/ums removal
infoframe tracking
fixes for lots of things.
- nouveau:
tegra k1 voltage support
GM204 modesetting support
GT21x memory reclocking work
- radeon:
CI dpm fixes
GPUVM improvements
Initial DPM fan control
- rcar-du:
HDMI support added
removed some support for old boards
slave encoder driver for Analog Devices adv7511
- exynos:
Exynos4415 SoC support
- msm:
a4xx gpu support
atomic helper conversion
- tegra:
iommu support
universal plane support
ganged-mode DSI support
- sti:
HDMI i2c improvements
- vmwgfx:
some late fixes.
- qxl:
use suggested x/y properties"
* 'drm-next' of git://people.freedesktop.org/~airlied/linux: (969 commits)
drm: sti: fix module compilation issue
drm/i915: save/restore GMBUS freq across suspend/resume on gen4
drm: sti: correctly cleanup CRTC and planes
drm: sti: add HQVDP plane
drm: sti: add cursor plane
drm: sti: enable auxiliary CRTC
drm: sti: fix delay in VTG programming
drm: sti: prepare sti_tvout to support auxiliary crtc
drm: sti: use drm_crtc_vblank_{on/off} instead of drm_vblank_{on/off}
drm: sti: fix hdmi avi infoframe
drm: sti: remove event lock while disabling vblank
drm: sti: simplify gdp code
drm: sti: clear all mixer control
drm: sti: remove gpio for HDMI hot plug detection
drm: sti: allow to change hdmi ddc i2c adapter
drm/doc: Document drm_add_modes_noedid() usage
drm/i915: Remove '& 0xffff' from the mask given to WA_REG()
drm/i915: Invert the mask and val arguments in wa_add() and WA_REG()
drm: Zero out DRM object memory upon cleanup
drm/i915/bdw: Fix the write setting up the WIZ hashing mode
...
Linus Torvalds [Mon, 15 Dec 2014 23:07:33 +0000 (15:07 -0800)]
x86: mm: consolidate VM_FAULT_RETRY handling
The VM_FAULT_RETRY handling was confusing and incorrect for the case of
returning to kernel mode. We need to handle the exception table fixup
if we return to kernel mode due to a fatal signal - it will basically
look to the kernel user mode access like the access failed due to the VM
going away from udner it. Which is correct - the process is dying - and
avoids the whole "repeat endless kernel page faults" case.
Handling the VM_FAULT_RETRY early and in just one place also simplifies
the mmap_sem handling, since once we've taken care of VM_FAULT_RETRY we
know that we can just drop the lock. The remaining accounting and
possible error handling is thread-local and does not need the mmap_sem.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Linus Torvalds [Mon, 15 Dec 2014 22:46:06 +0000 (14:46 -0800)]
x86: mm: move mmap_sem unlock from mm_fault_error() to caller
This replaces four copies in various stages of mm_fault_error() handling
with just a single one. It will also allow for more natural placement
of the unlocking after some further cleanup.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Kevin Hilman [Mon, 15 Dec 2014 21:59:43 +0000 (13:59 -0800)]
Merge tag 'omap-for-v3.19/fixes-for-merge-window' of git://git./linux/kernel/git/tmlind/linux-omap into fixes
From: Tony Lindgren <tony@atomide.com>
Subject: [GIT PULL] few fixes for the v3.19 merge window
Fixes for a few issues found that would be good to get
into -rc1:
- Update SoC revision detection for am43x es1.2
- Fix regression with GPMC timings on 2430sdp for some versions
of u-boot
- Fix dra7 watchdog compatible property
- Fix am437x-sk-evm LCD timings
- Fix dra7 DSS clock muxing
- Fix dra7-evm voltages
- Remove a unused function prototype for am33xx_clk_init
- Enable AHCI in the omap2plus_defconfig
* tag 'omap-for-v3.19/fixes-for-merge-window' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap: (1601 commits)
ARM: omap2plus_defconfig: Enable AHCI_PLATFORM driver
ARM: dts: am437x-sk-evm.dts: fix LCD timings
ARM: dts: dra7-evm: Update SMPS7 (VDD_CORE) max voltage to match DM
ARM: dts: dra7-evm: Fix typo in SMPS6 (VDD_GPU) max voltage
ARM: OMAP2+: AM43x: Add ID for ES1.2
ARM: dts: am437x-sk: fix lcd enable pin mux data
ARM: dts: Fix gpmc regression for omap 2430sdp smc91x
hwmon: (tmp401) Detect TMP435 on all addresses it supports
mfd: rtsx: Add func to split u32 into register
mmc: sdhci-msm: Convert to mmc_send_tuning()
mmc: sdhci-esdhc-imx: Convert to mmc_send_tuning()
mmc: core: Let mmc_send_tuning() to take struct mmc_host* as parameter
nios2: Make NIOS2_CMDLINE_IGNORE_DTB depend on CMDLINE_BOOL
nios2: Add missing NR_CPUS to Kconfig
nios2: asm-offsets: Remove unused definition TI_TASK
nios2: Remove write-only struct member from nios2_timer
nios2: Remove unused extern declaration of shm_align_mask
nios2: include linux/type.h in io.h
nios2: move include asm-generic/io.h to end of file
nios2: remove include asm-generic/iomap.h from io.h
...
Viresh Kumar [Mon, 15 Dec 2014 04:18:19 +0000 (09:48 +0530)]
ARM: defconfigs: use CONFIG_CPUFREQ_DT
CONFIG_GENERIC_CPUFREQ_CPU0 disappeared with commit
bbcf071969b20f
("cpufreq: cpu0: rename driver and internals to 'cpufreq_dt'") and some
defconfigs are still using it instead of the new one.
Use the renamed CONFIG_CPUFREQ_DT generic driver.
Cc: <stable@vger.kernel.org> # 3.18
Reported-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Kevin Hilman <khilman@linaro.org>
David Vrabel [Mon, 15 Dec 2014 16:41:00 +0000 (16:41 +0000)]
Merge branch 'devel/for-linus-3.19' into stable/for-linus-3.19
Jens Axboe [Mon, 15 Dec 2014 15:30:26 +0000 (08:30 -0700)]
Revert "blk-mq: Micro-optimize bt_get()"
This reverts commit
52f7eb945f2ba62b324bb9ae16d945326a961dcf.
The optimization is only really safe for a single queue, otherwise
'bs' and 'bt' can indeed change, and if we don't do a finish_wait()
for each loop, we'll potentially change the wait structure and
corrupt task wait list.
Reported-by: Jan Kara <jack@suse.cz>
Steven Rostedt (Red Hat) [Sat, 13 Dec 2014 03:27:10 +0000 (22:27 -0500)]
tracing: Add tp_printk cmdline to have tracepoints go to printk()
Add the kernel command line tp_printk option that will have tracepoints
that are active sent to printk() as well as to the trace buffer.
Passing "tp_printk" will activate this. To turn it off, the sysctl
/proc/sys/kernel/tracepoint_printk can have '0' echoed into it. Note,
this only works if the cmdline option is used. Echoing 1 into the sysctl
file without the cmdline option will have no affect.
Note, this is a dangerous option. Having high frequency tracepoints send
their data to printk() can possibly cause a live lock. This is another
reason why this is only active if the command line option is used.
Link: http://lkml.kernel.org/r/alpine.DEB.2.11.1412121539300.16494@nanos
Suggested-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Steven Rostedt (Red Hat) [Sat, 13 Dec 2014 01:05:10 +0000 (20:05 -0500)]
tracing: Move enabling tracepoints to just after rcu_init()
Enabling tracepoints at boot up can be very useful. The tracepoint
can be initialized right after RCU has been. There's no need to
wait for the early_initcall() to be called. That's too late for some
things that can use tracepoints for debugging. Move the logic to
enable tracepoints out of the initcalls and into init/main.c to
right after rcu_init().
This also allows trace_printk() to be used early too.
Link: http://lkml.kernel.org/r/alpine.DEB.2.11.1412121539300.16494@nanos
Link: http://lkml.kernel.org/r/20141214164104.307127356@goodmis.org
Reviewed-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Suggested-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Jan Kara [Mon, 15 Dec 2014 13:22:46 +0000 (14:22 +0100)]
isofs: Fix infinite looping over CE entries
Rock Ridge extensions define so called Continuation Entries (CE) which
define where is further space with Rock Ridge data. Corrupted isofs
image can contain arbitrarily long chain of these, including a one
containing loop and thus causing kernel to end in an infinite loop when
traversing these entries.
Limit the traversal to 32 entries which should be more than enough space
to store all the Rock Ridge data.
Reported-by: P J P <ppandit@redhat.com>
CC: stable@vger.kernel.org
Signed-off-by: Jan Kara <jack@suse.cz>
benjamin.gaignard@linaro.org [Sat, 13 Dec 2014 06:59:31 +0000 (07:59 +0100)]
drm: sti: fix module compilation issue
When compiling in module some symbol aren't missing,
export them correctly.
Signed-off-by: Benjamin Gaignard <benjamin.gaignard@linaro.org>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Linus Torvalds [Mon, 15 Dec 2014 04:36:37 +0000 (20:36 -0800)]
Merge branch 'next' of git://git./linux/kernel/git/jmorris/linux-security
Pull security layer updates from James Morris:
"In terms of changes, there's general maintenance to the Smack,
SELinux, and integrity code.
The IMA code adds a new kconfig option, IMA_APPRAISE_SIGNED_INIT,
which allows IMA appraisal to require signatures. Support for reading
keys from rootfs before init is call is also added"
* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security: (23 commits)
selinux: Remove security_ops extern
security: smack: fix out-of-bounds access in smk_parse_smack()
VFS: refactor vfs_read()
ima: require signature based appraisal
integrity: provide a hook to load keys when rootfs is ready
ima: load x509 certificate from the kernel
integrity: provide a function to load x509 certificate from the kernel
integrity: define a new function integrity_read_file()
Security: smack: replace kzalloc with kmem_cache for inode_smack
Smack: Lock mode for the floor and hat labels
ima: added support for new kernel cmdline parameter ima_template_fmt
ima: allocate field pointers array on demand in template_desc_init_fields()
ima: don't allocate a copy of template_fmt in template_desc_init_fields()
ima: display template format in meas. list if template name length is zero
ima: added error messages to template-related functions
ima: use atomic bit operations to protect policy update interface
ima: ignore empty and with whitespaces policy lines
ima: no need to allocate entry for comment
ima: report policy load status
ima: use path names cache
...
Linus Torvalds [Mon, 15 Dec 2014 00:43:47 +0000 (16:43 -0800)]
Merge tag 'char-misc-3.19-rc1' of git://git./linux/kernel/git/gregkh/char-misc
Pull char/misc driver updates from Greg KH:
"Here's the big char/misc driver update for 3.19-rc1
Lots of little things all over the place in different drivers, and a
new subsystem, "coresight" has been added. Full details are in the
shortlog"
* tag 'char-misc-3.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (73 commits)
parport: parport_pc, do not remove parent devices early
spmi: Remove shutdown/suspend/resume kernel-doc
carma-fpga-program: drop videobuf dependency
carma-fpga: drop videobuf dependency
carma-fpga-program.c: fix compile errors
i8k: Fix temperature bug handling in i8k_get_temp()
cxl: Name interrupts in /proc/interrupt
CXL: Return error to PSL if IRQ demultiplexing fails & print clearer warning
coresight-replicator: remove .owner field for driver
coresight: fixed comments in coresight.h
coresight: fix typo in comment in coresight-priv.h
coresight: bindings for coresight drivers
coresight: Adding ABI documentation
w1: support auto-load of w1_bq27000 module.
w1: avoid potential u16 overflow
cn: verify msg->len before making callback
mei: export fw status registers through sysfs
mei: read and print all six FW status registers
mei: txe: add cherrytrail device id
mei: kill cached host and me csr values
...
Linus Torvalds [Mon, 15 Dec 2014 00:10:09 +0000 (16:10 -0800)]
Merge tag 'driver-core-3.19-rc1' of git://git./linux/kernel/git/gregkh/driver-core
Pull driver core update from Greg KH:
"Here's the set of driver core patches for 3.19-rc1.
They are dominated by the removal of the .owner field in platform
drivers. They touch a lot of files, but they are "simple" changes,
just removing a line in a structure.
Other than that, a few minor driver core and debugfs changes. There
are some ath9k patches coming in through this tree that have been
acked by the wireless maintainers as they relied on the debugfs
changes.
Everything has been in linux-next for a while"
* tag 'driver-core-3.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (324 commits)
Revert "ath: ath9k: use debugfs_create_devm_seqfile() helper for seq_file entries"
fs: debugfs: add forward declaration for struct device type
firmware class: Deletion of an unnecessary check before the function call "vunmap"
firmware loader: fix hung task warning dump
devcoredump: provide a one-way disable function
device: Add dev_<level>_once variants
ath: ath9k: use debugfs_create_devm_seqfile() helper for seq_file entries
ath: use seq_file api for ath9k debugfs files
debugfs: add helper function to create device related seq_file
drivers/base: cacheinfo: remove noisy error boot message
Revert "core: platform: add warning if driver has no owner"
drivers: base: support cpu cache information interface to userspace via sysfs
drivers: base: add cpu_device_create to support per-cpu devices
topology: replace custom attribute macros with standard DEVICE_ATTR*
cpumask: factor out show_cpumap into separate helper function
driver core: Fix unbalanced device reference in drivers_probe
driver core: fix race with userland in device_add()
sysfs/kernfs: make read requests on pre-alloc files use the buffer.
sysfs/kernfs: allow attributes to request write buffer be pre-allocated.
fs: sysfs: return EGBIG on write if offset is larger than file size
...
Linus Torvalds [Sun, 14 Dec 2014 23:23:32 +0000 (15:23 -0800)]
Merge tag 'tty-3.19-rc1' of git://git./linux/kernel/git/gregkh/tty
Pull tty/serial driver updates from Greg KH:
"Here's the big tty/serial driver update for 3.19-rc1.
There are a number of TTY core changes/fixes in here from Peter Hurley
that have all been teted in linux-next for a long time now. There are
also the normal serial driver updates as well, full details in the
changelog below"
* tag 'tty-3.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (219 commits)
serial: pxa: hold port.lock when reporting modem line changes
tty-hvsi_lib: Deletion of an unnecessary check before the function call "tty_kref_put"
tty: Deletion of unnecessary checks before two function calls
n_tty: Fix read_buf race condition, increment read_head after pushing data
serial: of-serial: add PM suspend/resume support
Revert "serial: of-serial: add PM suspend/resume support"
Revert "serial: of-serial: fix up PM ops on no_console_suspend and port type"
serial: 8250: don't attempt a trylock if in sysrq
serial: core: Add big-endian iotype
serial: samsung: use port->fifosize instead of hardcoded values
serial: samsung: prefer to use fifosize from driver data
serial: samsung: fix style problems
serial: samsung: wait for transfer completion before clock disable
serial: icom: fix error return code
serial: tegra: clean up tty-flag assignments
serial: Fix io address assign flow with Fintek PCI-to-UART Product
serial: mxs-auart: fix tx_empty against shift register
serial: mxs-auart: fix gpio change detection on interrupt
serial: mxs-auart: Fix mxs_auart_set_ldisc()
serial: 8250_dw: Use 64-bit access for OCTEON.
...
Linus Torvalds [Sun, 14 Dec 2014 22:57:16 +0000 (14:57 -0800)]
Merge tag 'usb-3.19-rc1' of git://git./linux/kernel/git/gregkh/usb
Pull USB updates from Greg KH:
"Here's the big set of USB and PHY patches for 3.19-rc1.
The normal churn in the USB gadget area is in here, as well as xhci
and other individual USB driver updates. The PHY tree is also in
here, as there were dependancies on the USB tree.
All of these have been in linux-next"
* tag 'usb-3.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (351 commits)
arm: omap3: twl: remove usb phy init data
usbip: fix error handling in stub_probe()
usb: gadget: udc: missing curly braces
USB: mos7720: delete some unneeded code
wusb: replace memset by memzero_explicit
usbip: remove unneeded structure
usb: xhci: fix comment for PORT_DEV_REMOVE
xhci: don't use the same variable for stopped and halted rings current TD
xhci: clear extra bits from slot context when setting max exit latency
xhci: cleanup finish_td function
USB: adutux: NULL dereferences on disconnect
usb: chipidea: fix platform_no_drv_owner.cocci warnings
usb: chipidea: Fixed a few typos in comments
Documentation: bindings: add doc for the USB2 ChipIdea USB driver
usb: chipidea: add a usb2 driver for ci13xxx
usb: chipidea: fix phy handling
usb: chipidea: remove duplicate dev_set_drvdata for host_start
usb: chipidea: parameter 'mode' isn't needed for hw_device_reset
usb: chipidea: add controller reset API
usb: chipidea: remove flag CI_HDRC_REQUIRE_TRANSCEIVER
...
Linus Torvalds [Sun, 14 Dec 2014 22:42:53 +0000 (14:42 -0800)]
Merge tag 'squashfs-updates' of git://git./linux/kernel/git/pkl/squashfs-next
Pull squashfs update from Phillip Lougher:
"These patches optionally add LZ4 compression support to Squashfs.
LZ4 is a lightweight compression algorithm which can be used on
embedded systems to reduce CPU and memory overhead (in comparison to
the standard zlib compression).
These patches add the wrapper code to allow Squashfs to use the
existing LZ4 decompression code, and the necessary configuration
option"
* tag 'squashfs-updates' of git://git.kernel.org/pub/scm/linux/kernel/git/pkl/squashfs-next:
Squashfs: Add LZ4 compression configuration option
Squashfs: add LZ4 compression support
Linus Torvalds [Sun, 14 Dec 2014 22:05:05 +0000 (14:05 -0800)]
Merge tag 'gpio-v3.19-2' of git://git./linux/kernel/git/linusw/linux-gpio
Pull take two of the GPIO updates:
"Same stuff as last time, now with a fixup patch for the previous
compile error plus I ran a few extra rounds of compile-testing.
This is the bulk of GPIO changes for the v3.19 series:
- A new API that allows setting more than one GPIO at the time. This
is implemented for the new descriptor-based API only and makes it
possible to e.g. toggle a clock and data line at the same time, if
the hardware can do this with a single register write. Both
consumers and drivers need new calls, and the core will fall back
to driving individual lines where needed. Implemented for the
MPC8xxx driver initially
- Patched the mdio-mux-gpio and the serial mctrl driver that drives
modems to use the new multiple-setting API to set several signals
simultaneously
- Get rid of the global GPIO descriptor array, and instead allocate
descriptors dynamically for each GPIO on a certain GPIO chip. This
moves us closer to getting rid of the limitation of using the
global, static GPIO numberspace
- New driver and device tree bindings for 74xx ICs
- New driver and device tree bindings for the VF610 Vybrid
- Support the RCAR r8a7793 and r8a7794
- Guidelines for GPIO device tree bindings trying to get things a bit
more strict with the advent of combined device properties
- Suspend/resume support for the MVEBU driver
- A slew of minor fixes and improvements"
* tag 'gpio-v3.19-2' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio: (33 commits)
gpio: mcp23s08: fix up compilation error
gpio: pl061: document gpio-ranges property for bindings file
gpio: pl061: hook request if gpio-ranges avaiable
gpio: mcp23s08: Add option to configure IRQ output polarity as active high
gpio: fix deferred probe detection for legacy API
serial: mctrl_gpio: use gpiod_set_array function
mdio-mux-gpio: Use GPIO descriptor interface and new gpiod_set_array function
gpio: remove const modifier from gpiod_get_direction()
gpio: remove gpio_descs global array
gpio: mxs: implement get_direction callback
gpio: em: Use dynamic allocation of GPIOs
gpio: Check if base is positive before calling gpio_is_valid()
gpio: mcp23s08: Add simple IRQ support for SPI devices
gpio: mcp23s08: request a shared interrupt
gpio: mcp23s08: Do not free unrequested interrupt
gpio: rcar: Add r8a7793 and r8a7794 support
gpio-mpc8xxx: add mpc8xxx_gpio_set_multiple function
gpiolib: allow simultaneous setting of multiple GPIO outputs
gpio: mvebu: add suspend/resume support
gpio: gpio-davinci: remove duplicate check on resource
..
Linus Torvalds [Sun, 14 Dec 2014 21:36:57 +0000 (13:36 -0800)]
Merge git://git.kvack.org/~bcrl/aio-next
Pull aio updates from Benjamin LaHaise.
* git://git.kvack.org/~bcrl/aio-next:
aio: Skip timer for io_getevents if timeout=0
aio: Make it possible to remap aio ring
Linus Torvalds [Sun, 14 Dec 2014 20:54:40 +0000 (12:54 -0800)]
Merge branch 'i2c/for-3.19' of git://git./linux/kernel/git/wsa/linux
Pull i2c updates from Wolfram Sang:
"For 3.19, the I2C subsystem has to offer special candy this time.
Right in time for Christmas :)
- I2C slave framework: finally, a generic mechanism for Linux being
an I2C slave (if the bus driver supports that). Docs are still
missing but will come later this cycle, the code is good enough to
go.
- I2C muxes represent their topology in sysfs much more detailed.
This will help users to navigate around much easier.
- irq population of i2c clients is now done at probe time, not device
creation time, to have better support for deferred probing.
- new drivers for Imagination SCB, Amlogic Meson
- DMA support added for Freescale IMX, Renesas SHMobile
- slightly bigger driver updates to OMAP, i801, AT91, and rk3x
(mostly quirk handling, timing updates, and using better kernel
interfaces)
- eeprom driver can now write with byte-access (very slow, but OK to
have)
- and the bunch of smaller fixes, cleanups, ID updates..."
* 'i2c/for-3.19' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux: (56 commits)
i2c: sh_mobile: remove unneeded DMA mask
i2c: rcar: add slave support
i2c: slave-eeprom: add eeprom simulator driver
i2c: core changes for slave support
MAINTAINERS: add I2C dt bindings also to I2C realm
i2c: designware: Fix falling time bindings doc
i2c: davinci: switch to use platform_get_irq
Documentation: i2c: Use PM ops instead of legacy suspend/resume
i2c: sh_mobile: optimize irq entry
i2c: pxa: add support for SCCB devices
omap: i2c: don't check bus state IP rev3.3 and earlier
i2c: s3c2410: Handle i2c sys_cfg register in i2c driver
i2c: rk3x: add Kconfig dependency on COMMON_CLK
i2c: omap: add notes related to i2c multimaster mode
i2c: omap: don't reset controller if Arbitration Lost detected
i2c: omap: implement workaround for handling invalid BB-bit values
i2c: omap: cleanup register definitions
i2c: rk3x: handle dynamic clock rate changes correctly
i2c: at91: enable probe deferring on dma channel request
i2c: at91: remove legacy DMA support
...
Linus Torvalds [Sun, 14 Dec 2014 20:13:05 +0000 (12:13 -0800)]
Merge tag 'md/3.19' of git://neil.brown.name/md
Pull md updates from Neil Brown:
"Three fixes for md.
I did have a largish set of locking changes queued, but late testing
showed they weren't quite as stable as I thought and while I fixed
what I found, I decided it safer to delay them a release ...
particularly as I'll be AFK for a few weeks. So expect a larger batch
next time :-)"
* tag 'md/3.19' of git://neil.brown.name/md:
md: Check MD_RECOVERY_RUNNING as well as ->sync_thread.
md: fix semicolon.cocci warnings
md/raid5: fetch_block must fetch all the blocks handle_stripe_dirtying wants.
Linus Torvalds [Sun, 14 Dec 2014 19:51:50 +0000 (11:51 -0800)]
Merge branch 'x86-urgent-for-linus' of git://git./linux/kernel/git/tip/tip
Pull x86 fixes from Ingo Molnar:
"Misc fixes (mainly Andy's TLS fixes), plus a cleanup"
* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/tls: Disallow unusual TLS segments
x86/tls: Validate TLS entries to protect espfix
MAINTAINERS: Add me as x86 VDSO submaintainer
x86/asm: Unify segment selector defines
x86/asm: Guard against building the 32/64-bit versions of the asm-offsets*.c file directly
x86_64, switch_to(): Load TLS descriptors before switching DS and ES
x86/mm: Use min() instead of min_t() in the e820 printout code
x86/mm: Fix zone ranges boot printout
x86/doc: Update documentation after file shuffling
Fabio Estevam [Sat, 13 Dec 2014 19:02:08 +0000 (11:02 -0800)]
Input: gpio_keys - fix warning regarding uninitialized 'button' variable
Commit
af906faabcf91eb1 ("Input: gpio_keys - fix warning regarding uninitialized
'irq' variable") introduced the following build warning:
drivers/input/keyboard/gpio_keys.c:625:16: warning: 'button' may be used uninitialized in this function [-Wmaybe-uninitialized]
Move the 'button' initialization to a proper location to avoid such warning.
Reported-by: Olof's autobuilder <build@lixom.net>
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Andy Lutomirski [Fri, 5 Dec 2014 00:48:17 +0000 (16:48 -0800)]
x86/tls: Disallow unusual TLS segments
Users have no business installing custom code segments into the
GDT, and segments that are not present but are otherwise valid
are a historical source of interesting attacks.
For completeness, block attempts to set the L bit. (Prior to
this patch, the L bit would have been silently dropped.)
This is an ABI break. I've checked glibc, musl, and Wine, and
none of them look like they'll have any trouble.
Note to stable maintainers: this is a hardening patch that fixes
no known bugs. Given the possibility of ABI issues, this
probably shouldn't be backported quickly.
Signed-off-by: Andy Lutomirski <luto@amacapital.net>
Acked-by: H. Peter Anvin <hpa@zytor.com>
Cc: stable@vger.kernel.org # optional
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: security@kernel.org <security@kernel.org>
Cc: Willy Tarreau <w@1wt.eu>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Andy Lutomirski [Fri, 5 Dec 2014 00:48:16 +0000 (16:48 -0800)]
x86/tls: Validate TLS entries to protect espfix
Installing a 16-bit RW data segment into the GDT defeats espfix.
AFAICT this will not affect glibc, Wine, or dosemu at all.
Signed-off-by: Andy Lutomirski <luto@amacapital.net>
Acked-by: H. Peter Anvin <hpa@zytor.com>
Cc: stable@vger.kernel.org
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: security@kernel.org <security@kernel.org>
Cc: Willy Tarreau <w@1wt.eu>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Andy Lutomirski [Sat, 13 Dec 2014 00:25:47 +0000 (16:25 -0800)]
MAINTAINERS: Add me as x86 VDSO submaintainer
Here goes... :)
Signed-off-by: Andy Lutomirski <luto@amacapital.net>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1042001e502f8e0deb0edfeeac209b68378650cf.1418430292.git.luto@amacapital.net
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Fam Zheng [Thu, 6 Nov 2014 12:44:36 +0000 (20:44 +0800)]
aio: Skip timer for io_getevents if timeout=0
In this case, it is basically a polling. Let's not involve timer at all
because that would hurt performance for application event loops.
In an arbitrary test I've done, io_getevents syscall elapsed time
reduces from 50000+ nanoseconds to a few hundereds.
Signed-off-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Benjamin LaHaise <bcrl@kvack.org>
Pavel Emelyanov [Thu, 18 Sep 2014 15:56:17 +0000 (19:56 +0400)]
aio: Make it possible to remap aio ring
There are actually two issues this patch addresses. Let me start with
the one I tried to solve in the beginning.
So, in the checkpoint-restore project (criu) we try to dump tasks'
state and restore one back exactly as it was. One of the tasks' state
bits is rings set up with io_setup() call. There's (almost) no problems
in dumping them, there's a problem restoring them -- if I dump a task
with aio ring originally mapped at address A, I want to restore one
back at exactly the same address A. Unfortunately, the io_setup() does
not allow for that -- it mmaps the ring at whatever place mm finds
appropriate (it calls do_mmap_pgoff() with zero address and without
the MAP_FIXED flag).
To make restore possible I'm going to mremap() the freshly created ring
into the address A (under which it was seen before dump). The problem is
that the ring's virtual address is passed back to the user-space as the
context ID and this ID is then used as search key by all the other io_foo()
calls. Reworking this ID to be just some integer doesn't seem to work, as
this value is already used by libaio as a pointer using which this library
accesses memory for aio meta-data.
So, to make restore work we need to make sure that
a) ring is mapped at desired virtual address
b) kioctx->user_id matches this value
Having said that, the patch makes mremap() on aio region update the
kioctx's user_id and mmap_base values.
Here appears the 2nd issue I mentioned in the beginning of this mail.
If (regardless of the C/R dances I do) someone creates an io context
with io_setup(), then mremap()-s the ring and then destroys the context,
the kill_ioctx() routine will call munmap() on wrong (old) address.
This will result in a) aio ring remaining in memory and b) some other
vma get unexpectedly unmapped.
What do you think?
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
Acked-by: Dmitry Monakhov <dmonakhov@openvz.org>
Signed-off-by: Benjamin LaHaise <bcrl@kvack.org>
Linus Torvalds [Sat, 13 Dec 2014 22:22:26 +0000 (14:22 -0800)]
Merge branch 'for-3.19/drivers' of git://git.kernel.dk/linux-block
Pull block layer driver updates from Jens Axboe:
- NVMe updates:
- The blk-mq conversion from Matias (and others)
- A stack of NVMe bug fixes from the nvme tree, mostly from Keith.
- Various bug fixes from me, fixing issues in both the blk-mq
conversion and generic bugs.
- Abort and CPU online fix from Sam.
- Hot add/remove fix from Indraneel.
- A couple of drbd fixes from the drbd team (Andreas, Lars, Philipp)
- With the generic IO stat accounting from 3.19/core, converting md,
bcache, and rsxx to use those. From Gu Zheng.
- Boundary check for queue/irq mode for null_blk from Matias. Fixes
cases where invalid values could be given, causing the device to hang.
- The xen blkfront pull request, with two bug fixes from Vitaly.
* 'for-3.19/drivers' of git://git.kernel.dk/linux-block: (56 commits)
NVMe: fix race condition in nvme_submit_sync_cmd()
NVMe: fix retry/error logic in nvme_queue_rq()
NVMe: Fix FS mount issue (hot-remove followed by hot-add)
NVMe: fix error return checking from blk_mq_alloc_request()
NVMe: fix freeing of wrong request in abort path
xen/blkfront: remove redundant flush_op
xen/blkfront: improve protection against issuing unsupported REQ_FUA
NVMe: Fix command setup on IO retry
null_blk: boundary check queue_mode and irqmode
block/rsxx: use generic io stats accounting functions to simplify io stat accounting
md: use generic io stats accounting functions to simplify io stat accounting
drbd: use generic io stats accounting functions to simplify io stat accounting
md/bcache: use generic io stats accounting functions to simplify io stat accounting
NVMe: Update module version major number
NVMe: fail pci initialization if the device doesn't have any BARs
NVMe: add ->exit_hctx() hook
NVMe: make setup work for devices that don't do INTx
NVMe: enable IO stats by default
NVMe: nvme_submit_async_admin_req() must use atomic rq allocation
NVMe: replace blk_put_request() with blk_mq_free_request()
...
Linus Torvalds [Sat, 13 Dec 2014 22:14:23 +0000 (14:14 -0800)]
Merge branch 'for-3.19/core' of git://git.kernel.dk/linux-block
Pull block driver core update from Jens Axboe:
"This is the pull request for the core block IO changes for 3.19. Not
a huge round this time, mostly lots of little good fixes:
- Fix a bug in sysfs blktrace interface causing a NULL pointer
dereference, when enabled/disabled through that API. From Arianna
Avanzini.
- Various updates/fixes/improvements for blk-mq:
- A set of updates from Bart, mostly fixing buts in the tag
handling.
- Cleanup/code consolidation from Christoph.
- Extend queue_rq API to be able to handle batching issues of IO
requests. NVMe will utilize this shortly. From me.
- A few tag and request handling updates from me.
- Cleanup of the preempt handling for running queues from Paolo.
- Prevent running of unmapped hardware queues from Ming Lei.
- Move the kdump memory limiting check to be in the correct
location, from Shaohua.
- Initialize all software queues at init time from Takashi. This
prevents a kobject warning when CPUs are brought online that
weren't online when a queue was registered.
- Single writeback fix for I_DIRTY clearing from Tejun. Queued with
the core IO changes, since it's just a single fix.
- Version X of the __bio_add_page() segment addition retry from
Maurizio. Hope the Xth time is the charm.
- Documentation fixup for IO scheduler merging from Jan.
- Introduce (and use) generic IO stat accounting helpers for non-rq
drivers, from Gu Zheng.
- Kill off artificial limiting of max sectors in a request from
Christoph"
* 'for-3.19/core' of git://git.kernel.dk/linux-block: (26 commits)
bio: modify __bio_add_page() to accept pages that don't start a new segment
blk-mq: Fix uninitialized kobject at CPU hotplugging
blktrace: don't let the sysfs interface remove trace from running list
blk-mq: Use all available hardware queues
blk-mq: Micro-optimize bt_get()
blk-mq: Fix a race between bt_clear_tag() and bt_get()
blk-mq: Avoid that __bt_get_word() wraps multiple times
blk-mq: Fix a use-after-free
blk-mq: prevent unmapped hw queue from being scheduled
blk-mq: re-check for available tags after running the hardware queue
blk-mq: fix hang in bt_get()
blk-mq: move the kdump check to blk_mq_alloc_tag_set
blk-mq: cleanup tag free handling
blk-mq: use 'nr_cpu_ids' as highest CPU ID count for hwq <-> cpu map
blk: introduce generic io stat accounting help function
blk-mq: handle the single queue case in blk_mq_hctx_next_cpu
genhd: check for int overflow in disk_expand_part_tbl()
blk-mq: add blk_mq_free_hctx_request()
blk-mq: export blk_mq_free_request()
blk-mq: use get_cpu/put_cpu instead of preempt_disable/preempt_enable
...
Linus Torvalds [Sat, 13 Dec 2014 22:04:41 +0000 (14:04 -0800)]
Merge tag 'trace-seq-buf-3.19-v2' of git://git./linux/kernel/git/rostedt/linux-trace
Pull tracing fixlet from Steven Rostedt:
"Remove unnecessary preempt_disable in printk()"
* tag 'trace-seq-buf-3.19-v2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
printk: Do not disable preemption for accessing printk_func
Linus Torvalds [Sat, 13 Dec 2014 22:01:11 +0000 (14:01 -0800)]
Merge tag 'trace-fixes-v3.18' of git://git./linux/kernel/git/rostedt/linux-trace
Pull tracing fixes from Steven Rostedt:
"Here's two fixes:
1) Discovered by Fengguang Wu's tests. I changed the parameters to
the function graph x86 prepare_ftrace_return call but forgot to
update the call from entry_32 (i386 version). This patch corrects
that.
2) I was tracing some code and found that the sched_switch tracepoint
was showing tasks in the INTERRUPTIBLE state as RUNNING. This was
due to the updates to convert preempt_count into a per_cpu
variable. The tracepoint logic was made to use the tasks
saved_preempt_count which could hold a stale "PREEMPT_ACTIVE",
instead of using the current preempt_count() call"
* tag 'trace-fixes-v3.18' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
tracing/sched: Check preempt_count() for current when reading task->state
ftrace/x86: Update i386 call to prepare_ftrace_return()
Linus Torvalds [Sat, 13 Dec 2014 21:41:28 +0000 (13:41 -0800)]
Merge branch 'upstream' of git://git.infradead.org/users/pcmoore/audit
Pull audit updates from Paul Moore:
"Two small patches from the audit next branch; only one of which has
any real significant code changes, the other is simply a MAINTAINERS
update for audit.
The single code patch is pretty small and rather straightforward, it
changes the audit "version" number reported to userspace from an
integer to a bitmap which is used to indicate the functionality of the
running kernel. This really doesn't have much impact on the kernel,
but it will make life easier for the audit userspace folks.
Thankfully we were still on a version number which allowed us to do
this without breaking userspace"
* 'upstream' of git://git.infradead.org/users/pcmoore/audit:
audit: convert status version to a feature bitmap
audit: add Paul Moore to the MAINTAINERS entry
Linus Torvalds [Sat, 13 Dec 2014 21:33:26 +0000 (13:33 -0800)]
Merge git://git./linux/kernel/git/herbert/crypto-2.6
Pull crypto update from Herbert Xu:
- The crypto API is now documented :)
- Disallow arbitrary module loading through crypto API.
- Allow get request with empty driver name through crypto_user.
- Allow speed testing of arbitrary hash functions.
- Add caam support for ctr(aes), gcm(aes) and their derivatives.
- nx now supports concurrent hashing properly.
- Add sahara support for SHA1/256.
- Add ARM64 version of CRC32.
- Misc fixes.
* git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: (77 commits)
crypto: tcrypt - Allow speed testing of arbitrary hash functions
crypto: af_alg - add user space interface for AEAD
crypto: qat - fix problem with coalescing enable logic
crypto: sahara - add support for SHA1/256
crypto: sahara - replace tasklets with kthread
crypto: sahara - add support for i.MX53
crypto: sahara - fix spinlock initialization
crypto: arm - replace memset by memzero_explicit
crypto: powerpc - replace memset by memzero_explicit
crypto: sha - replace memset by memzero_explicit
crypto: sparc - replace memset by memzero_explicit
crypto: algif_skcipher - initialize upon init request
crypto: algif_skcipher - removed unneeded code
crypto: algif_skcipher - Fixed blocking recvmsg
crypto: drbg - use memzero_explicit() for clearing sensitive data
crypto: drbg - use MODULE_ALIAS_CRYPTO
crypto: include crypto- module prefix in template
crypto: user - add MODULE_ALIAS
crypto: sha-mb - remove a bogus NULL check
crytpo: qat - Fix 64 bytes requests
...
Linus Torvalds [Sat, 13 Dec 2014 21:00:36 +0000 (13:00 -0800)]
Merge branch 'akpm' (second patch-bomb from Andrew)
Merge second patchbomb from Andrew Morton:
- the rest of MM
- misc fs fixes
- add execveat() syscall
- new ratelimit feature for fault-injection
- decompressor updates
- ipc/ updates
- fallocate feature creep
- fsnotify cleanups
- a few other misc things
* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (99 commits)
cgroups: Documentation: fix trivial typos and wrong paragraph numberings
parisc: percpu: update comments referring to __get_cpu_var
percpu: update local_ops.txt to reflect this_cpu operations
percpu: remove __get_cpu_var and __raw_get_cpu_var macros
fsnotify: remove destroy_list from fsnotify_mark
fsnotify: unify inode and mount marks handling
fallocate: create FAN_MODIFY and IN_MODIFY events
mm/cma: make kmemleak ignore CMA regions
slub: fix cpuset check in get_any_partial
slab: fix cpuset check in fallback_alloc
shmdt: use i_size_read() instead of ->i_size
ipc/shm.c: fix overly aggressive shmdt() when calls span multiple segments
ipc/msg: increase MSGMNI, remove scaling
ipc/sem.c: increase SEMMSL, SEMMNI, SEMOPM
ipc/sem.c: change memory barrier in sem_lock() to smp_rmb()
lib/decompress.c: consistency of compress formats for kernel image
decompress_bunzip2: off by one in get_next_block()
usr/Kconfig: make initrd compression algorithm selection not expert
fault-inject: add ratelimit option
ratelimit: add initialization macro
...
SeongJae Park [Sat, 13 Dec 2014 00:58:50 +0000 (16:58 -0800)]
cgroups: Documentation: fix trivial typos and wrong paragraph numberings
Signed-off-by: SeongJae Park <sj38.park@gmail.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Tejun Heo <tj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Christoph Lameter [Sat, 13 Dec 2014 00:58:47 +0000 (16:58 -0800)]
parisc: percpu: update comments referring to __get_cpu_var
__get_cpu_var was removed. Update comments to refer to
this_cpu_ptr() instead.
Signed-off-by: Christoph Lameter <cl@linux.com>
Cc: "James E.J. Bottomley" <James.Bottomley@HansenPartnership.com>
Cc: Tejun Heo <tj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Christoph Lameter [Sat, 13 Dec 2014 00:58:45 +0000 (16:58 -0800)]
percpu: update local_ops.txt to reflect this_cpu operations
Update the documentation to reflect changes due to the availability of
this_cpu operations.
Signed-off-by: Christoph Lameter <cl@linux.com>
Cc: Tejun Heo <tj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Christoph Lameter [Sat, 13 Dec 2014 00:58:42 +0000 (16:58 -0800)]
percpu: remove __get_cpu_var and __raw_get_cpu_var macros
No user is left in the kernel source tree. Therefore we can drop the
definitions.
This is the final merge of the transition away from __get_cpu_var. After
this patch the kernel will not build if anyone uses __get_cpu_var.
Signed-off-by: Christoph Lameter <cl@linux.com>
Cc: Tejun Heo <tj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Jan Kara [Sat, 13 Dec 2014 00:58:39 +0000 (16:58 -0800)]
fsnotify: remove destroy_list from fsnotify_mark
destroy_list is used to track marks which still need waiting for srcu
period end before they can be freed. However by the time mark is added to
destroy_list it isn't in group's list of marks anymore and thus we can
reuse fsnotify_mark->g_list for queueing into destroy_list. This saves
two pointers for each fsnotify_mark.
Signed-off-by: Jan Kara <jack@suse.cz>
Cc: Eric Paris <eparis@redhat.com>
Cc: Heinrich Schuchardt <xypron.glpk@gmx.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Jan Kara [Sat, 13 Dec 2014 00:58:36 +0000 (16:58 -0800)]
fsnotify: unify inode and mount marks handling
There's a lot of common code in inode and mount marks handling. Factor it
out to a common helper function.
Signed-off-by: Jan Kara <jack@suse.cz>
Cc: Eric Paris <eparis@redhat.com>
Cc: Heinrich Schuchardt <xypron.glpk@gmx.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Heinrich Schuchardt [Sat, 13 Dec 2014 00:58:34 +0000 (16:58 -0800)]
fallocate: create FAN_MODIFY and IN_MODIFY events
The fanotify and the inotify API can be used to monitor changes of the
file system. System call fallocate() modifies files. Hence it should
trigger the corresponding fanotify (FAN_MODIFY) and inotify (IN_MODIFY)
events. The most interesting case is FALLOC_FL_COLLAPSE_RANGE because
this value allows to create arbitrary file content from random data.
This patch adds the missing call to fsnotify_modify().
The FAN_MODIFY and IN_MODIFY event will be created when fallocate()
succeeds. It will even be created if the file length remains unchanged,
e.g. when calling fanotify with flag FALLOC_FL_KEEP_SIZE.
This logic was primarily chosen to keep the coding simple.
It resembles the logic of the write() system call.
When we call write() we always create a FAN_MODIFY event, even in the case
of overwriting with identical data.
Events FAN_MODIFY and IN_MODIFY do not provide any guarantee that data was
actually changed.
Furthermore even if if the filesize remains unchanged, fallocate() may
influence whether a subsequent write() will succeed and hence the
fallocate() call may be considered a modification.
The fallocate(2) man page teaches: After a successful call, subsequent
writes into the range specified by offset and len are guaranteed not to
fail because of lack of disk space.
So calling fallocate(fd, FALLOC_FL_KEEP_SIZE, offset, len) may result in
different outcomes of a subsequent write depending on the values of offset
and len.
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Jan Kara <jack@suse.cz>
Cc: Jan Kara <jack@suse.cz>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Eric Paris <eparis@parisplace.org>
Cc: John McCutchan <john@johnmccutchan.com>
Cc: Robert Love <rlove@rlove.org>
Cc: Michael Kerrisk <mtk.manpages@gmail.com>
Cc: Theodore Ts'o <tytso@mit.edu>
Cc: Dave Chinner <david@fromorbit.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Thierry Reding [Sat, 13 Dec 2014 00:58:31 +0000 (16:58 -0800)]
mm/cma: make kmemleak ignore CMA regions
kmemleak will add allocations as objects to a pool. The memory allocated
for each object in this pool is periodically searched for pointers to
other allocated objects. This only works for memory that is mapped into
the kernel's virtual address space, which happens not to be the case for
most CMA regions.
Furthermore, CMA regions are typically used to store data transferred to
or from a device and therefore don't contain pointers to other objects.
Without this, the kernel crashes on the first execution of the
scan_gray_list() because it tries to access highmem. Perhaps a more
appropriate fix would be to reject any object that can't map to a kernel
virtual address?
[akpm@linux-foundation.org: add comment]
[akpm@linux-foundation.org: fix comment, per Catalin]
[sfr@canb.auug.org.au: include linux/io.h for phys_to_virt()]
Signed-off-by: Thierry Reding <treding@nvidia.com>
Cc: Michal Nazarewicz <mina86@mina86.com>
Cc: Marek Szyprowski <m.szyprowski@samsung.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Vladimir Davydov [Sat, 13 Dec 2014 00:58:28 +0000 (16:58 -0800)]
slub: fix cpuset check in get_any_partial
If we fail to allocate from the current node's stock, we look for free
objects on other nodes before calling the page allocator (see
get_any_partial). While checking other nodes we respect cpuset
constraints by calling cpuset_zone_allowed. We enforce hardwall check.
As a result, we will fallback to the page allocator even if there are some
pages cached on other nodes, but the current cpuset doesn't have them set.
However, the page allocator uses softwall check for kernel allocations,
so it may allocate from one of the other nodes in this case.
Therefore we should use softwall cpuset check in get_any_partial to
conform with the cpuset check in the page allocator.
Signed-off-by: Vladimir Davydov <vdavydov@parallels.com>
Acked-by: Zefan Li <lizefan@huawei.com>
Acked-by: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Tejun Heo <tj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Vladimir Davydov [Sat, 13 Dec 2014 00:58:25 +0000 (16:58 -0800)]
slab: fix cpuset check in fallback_alloc
fallback_alloc is called on kmalloc if the preferred node doesn't have
free or partial slabs and there's no pages on the node's free list
(GFP_THISNODE allocations fail). Before invoking the reclaimer it tries
to locate a free or partial slab on other allowed nodes' lists. While
iterating over the preferred node's zonelist it skips those zones which
hardwall cpuset check returns false for. That means that for a task bound
to a specific node using cpusets fallback_alloc will always ignore free
slabs on other nodes and go directly to the reclaimer, which, however, may
allocate from other nodes if cpuset.mem_hardwall is unset (default). As a
result, we may get lists of free slabs grow without bounds on other nodes,
which is bad, because inactive slabs are only evicted by cache_reap at a
very slow rate and cannot be dropped forcefully.
To reproduce the issue, run a process that will walk over a directory tree
with lots of files inside a cpuset bound to a node that constantly
experiences memory pressure. Look at num_slabs vs active_slabs growth as
reported by /proc/slabinfo.
To avoid this we should use softwall cpuset check in fallback_alloc.
Signed-off-by: Vladimir Davydov <vdavydov@parallels.com>
Acked-by: Zefan Li <lizefan@huawei.com>
Acked-by: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Tejun Heo <tj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Dave Hansen [Sat, 13 Dec 2014 00:58:22 +0000 (16:58 -0800)]
shmdt: use i_size_read() instead of ->i_size
Andrew Morton noted
http://lkml.kernel.org/r/
20141104142027.
a7a0d010772d84560b445f59@linux-foundation.org
that the shmdt uses inode->i_size outside of i_mutex being held.
There is one more case in shm.c in shm_destroy(). This converts
both users over to use i_size_read().
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Manfred Spraul <manfred@colorfullife.com>
Cc: Davidlohr Bueso <dave@stgolabs.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Dave Hansen [Sat, 13 Dec 2014 00:58:19 +0000 (16:58 -0800)]
ipc/shm.c: fix overly aggressive shmdt() when calls span multiple segments
This is a highly-contrived scenario. But, a single shmdt() call can be
induced in to unmapping memory from mulitple shm segments. Example code
is here:
http://www.sr71.net/~dave/intel/shmfun.c
The fix is pretty simple: Record the 'struct file' for the first VMA we
encounter and then stick to it. Decline to unmap anything not from the
same file and thus the same segment.
I found this by inspection and the odds of anyone hitting this in practice
are pretty darn small.
Lightly tested, but it's a pretty small patch.
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Manfred Spraul <manfred@colorfullife.com>
Reviewed-by: Davidlohr Bueso <dave@stgolabs.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Manfred Spraul [Sat, 13 Dec 2014 00:58:17 +0000 (16:58 -0800)]
ipc/msg: increase MSGMNI, remove scaling
SysV can be abused to allocate locked kernel memory. For most systems, a
small limit doesn't make sense, see the discussion with regards to SHMMAX.
Therefore: increase MSGMNI to the maximum supported.
And: If we ignore the risk of locking too much memory, then an automatic
scaling of MSGMNI doesn't make sense. Therefore the logic can be removed.
The code preserves auto_msgmni to avoid breaking any user space applications
that expect that the value exists.
Notes:
1) If an administrator must limit the memory allocations, then he can set
MSGMNI as necessary.
Or he can disable sysv entirely (as e.g. done by Android).
2) MSGMAX and MSGMNB are intentionally not increased, as these values are used
to control latency vs. throughput:
If MSGMNB is large, then msgsnd() just returns and more messages can be queued
before a task switch to a task that calls msgrcv() is forced.
[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Manfred Spraul <manfred@colorfullife.com>
Cc: Davidlohr Bueso <dave@stgolabs.net>
Cc: Rafael Aquini <aquini@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Manfred Spraul [Sat, 13 Dec 2014 00:58:14 +0000 (16:58 -0800)]
ipc/sem.c: increase SEMMSL, SEMMNI, SEMOPM
a)
SysV can be abused to allocate locked kernel memory. For most systems, a
small limit doesn't make sense, see the discussion with regards to SHMMAX.
Therefore: Increase the sysv sem limits so that all known applications
will work with these defaults.
b)
With regards to the maximum supported:
Some of the specified hard limits are not correct anymore, therefore the
patch updates the documentation.
- SEMMNI must stay below IPCMNI, which is 32768.
As for SHMMAX: Stay a bit below this limit.
- SEMMSL was limited to 8k, to ensure that the kmalloc for the kernel array
was limited to 16 kB (order=2)
This doesn't apply anymore:
- the allocation size isn't sizeof(short)*nsems anymore.
- ipc_alloc falls back to vmalloc
- SEMOPM should stay below 1000, to limit the kmalloc in semtimedop() to an
order=1 allocation.
Therefore: Leave it at 500 (order=0 allocation).
Note:
If an administrator must limit the memory allocations, then he can set the
values as necessary.
Or he can disable sysv entirely (as e.g. done by Android).
Signed-off-by: Manfred Spraul <manfred@colorfullife.com>
Cc: Davidlohr Bueso <dave@stgolabs.net>
Acked-by: Rafael Aquini <aquini@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Manfred Spraul [Sat, 13 Dec 2014 00:58:11 +0000 (16:58 -0800)]
ipc/sem.c: change memory barrier in sem_lock() to smp_rmb()
When I fixed bugs in the sem_lock() logic, I was more conservative than
necessary. Therefore it is safe to replace the smp_mb() with smp_rmb().
And: With smp_rmb(), semop() syscalls are up to 10% faster.
The race we must protect against is:
sem->lock is free
sma->complex_count = 0
sma->sem_perm.lock held by thread B
thread A:
A: spin_lock(&sem->lock)
B: sma->complex_count++; (now 1)
B: spin_unlock(&sma->sem_perm.lock);
A: spin_is_locked(&sma->sem_perm.lock);
A: XXXXX memory barrier
A: if (sma->complex_count == 0)
Thread A must read the increased complex_count value, i.e. the read must
not be reordered with the read of sem_perm.lock done by spin_is_locked().
Since it's about ordering of reads, smp_rmb() is sufficient.
[akpm@linux-foundation.org: update sem_lock() comment, from Davidlohr]
Signed-off-by: Manfred Spraul <manfred@colorfullife.com>
Reviewed-by: Davidlohr Bueso <dave@stgolabs.net>
Acked-by: Rafael Aquini <aquini@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Haesung Kim [Sat, 13 Dec 2014 00:58:08 +0000 (16:58 -0800)]
lib/decompress.c: consistency of compress formats for kernel image
Magic number of compress formats for kernel image is defined by two bytes.
These numbers are written in hexadecimal number, nevertheless magic
number for only gunzip is written in octal number. The formats should be
consistent for readability. Therefore, magic numbers for gunzip are also
defined by hexadecimal number.
Signed-off-by: Haesung Kim <matia.kim@lge.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Dan Carpenter [Sat, 13 Dec 2014 00:58:05 +0000 (16:58 -0800)]
decompress_bunzip2: off by one in get_next_block()
"origPtr" is used as an offset into the bd->dbuf[] array. That array is
allocated in start_bunzip() and has "bd->dbufSize" number of elements so
the test here should be >= instead of >.
Later we check "origPtr" again before using it as an offset so I don't
know if this bug can be triggered in real life.
Fixes:
bc22c17e12c1 ('bzip2/lzma: library support for gzip, bzip2 and lzma decompression')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Cc: Alain Knaff <alain@knaff.lu>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Andi Kleen [Sat, 13 Dec 2014 00:58:03 +0000 (16:58 -0800)]
usr/Kconfig: make initrd compression algorithm selection not expert
The kernel has support for (nearly) every compression algorithm known to
man, each to handle some particular microscopic niche.
Unfortunately all of these always get compiled in if you want to support
INITRDs, and can be only disabled when CONFIG_EXPERT is set.
I don't see why I need to set EXPERT just to properly configure the initrd
compression algorithms, and not always include every possible algorithm
Usually the initrd is just compressed with gzip anyways, at least that's
true on all distributions I use.
Remove the dependencies for initrd compression on CONFIG_EXPERT.
Make the various options just default y, which should be good enough to
not break any previous configuration.
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Dmitry Monakhov [Sat, 13 Dec 2014 00:58:00 +0000 (16:58 -0800)]
fault-inject: add ratelimit option
Current debug levels are not optimal. Especially if one want to provoke
big numbers of faults(broken device simulator) then any verbose level will
produce giant numbers of identical logging messages. Let's add ratelimit
parameter for that purpose.
Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org>
Acked-by: Akinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Dmitry Monakhov [Sat, 13 Dec 2014 00:57:57 +0000 (16:57 -0800)]
ratelimit: add initialization macro
Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org>
Cc: Akinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Fabian Frederick [Sat, 13 Dec 2014 00:57:55 +0000 (16:57 -0800)]
fs/affs/file.c: remove obsolete pagesize check
linux kernel doesn't manage page sizes below 4kb.
Signed-off-by: Fabian Frederick <fabf@skynet.be>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Fabian Frederick [Sat, 13 Dec 2014 00:57:52 +0000 (16:57 -0800)]
fs/affs/file.c: add support to O_DIRECT
Based on ext2_direct_IO
Tested with O_DIRECT file open and sysbench/mariadb with 1% written
queries improvement (update_non_index test) on a volume created with
mkaffs.
Signed-off-by: Fabian Frederick <fabf@skynet.be>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Fabian Frederick [Sat, 13 Dec 2014 00:57:49 +0000 (16:57 -0800)]
fs/affs/amigaffs.c: use va_format instead of buffer/vnsprintf
-Remove ErrorBuffer and use %pV
-Add __printf to enable argument mistmatch warnings
Original patch by Joe Perches.
Signed-off-by: Fabian Frederick <fabf@skynet.be>
Cc: Joe Perches <joe@perches.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Fabian Frederick [Sat, 13 Dec 2014 00:57:47 +0000 (16:57 -0800)]
fs/affs/file.c: forward declaration clean-up
-Move file_operations to avoid forward declarations.
-Remove unused declarations.
Signed-off-by: Fabian Frederick <fabf@skynet.be>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>