Anton Blanchard [Wed, 10 Feb 2010 01:02:36 +0000 (01:02 +0000)]
powerpc: Use lwarx/ldarx hint in bit locks
This patch implements the lwarx/ldarx hint bit for bit locks.
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Anton Blanchard [Wed, 10 Feb 2010 00:57:28 +0000 (00:57 +0000)]
powerpc: Use lwarx hint in spinlocks
Recent versions of the PowerPC architecture added a hint bit to the larx
instructions to differentiate between an atomic operation and a lock operation:
> 0 Other programs might attempt to modify the word in storage addressed by EA
> even if the subsequent Store Conditional succeeds.
>
> 1 Other programs will not attempt to modify the word in storage addressed by
> EA until the program that has acquired the lock performs a subsequent store
> releasing the lock.
To avoid a binutils dependency this patch create macros for the extended lwarx
format and uses it in the spinlock code. To test this change I used a simple
test case that acquires and releases a global pthread mutex:
pthread_mutex_lock(&mutex);
pthread_mutex_unlock(&mutex);
On a 32 core POWER6, running 32 test threads we spend almost all our time in
the futex spinlock code:
94.37% perf [kernel] [k] ._raw_spin_lock
|
|--99.95%-- ._raw_spin_lock
| |
| |--63.29%-- .futex_wake
| |
| |--36.64%-- .futex_wait_setup
Which is a good test for this patch. The results (in lock/unlock operations per
second) are:
before:
1538203 ops/sec
after:
2189219 ops/sec
An improvement of 42%
A 32 core POWER7 improves even more:
before:
1279529 ops/sec
after:
2282076 ops/sec
An improvement of 78%
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Anton Blanchard [Sun, 31 Jan 2010 20:34:36 +0000 (20:34 +0000)]
powerpc: Convert global "BAD" interrupt to per cpu spurious
I often get asked if BAD interrupts are really bad. On some boxes (eg
IBM machines running a hypervisor) there are valid cases where are
presented with an interrupt that is not for us. These cases are common
enough to show up as thousands of BAD interrupts a day.
Tone them down by calling them spurious. Since they can be a significant cause
of OS jitter, we may as well log them per cpu so we know where they are
occurring.
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Anton Blanchard [Sun, 31 Jan 2010 20:34:06 +0000 (20:34 +0000)]
powerpc: Add timer, performance monitor and machine check counts to /proc/interrupts
With NO_HZ it is useful to know how often the decrementer is going off. The
patch below adds an entry for it and also adds it into the /proc/stat
summaries.
While here, I added performance monitoring and machine check exceptions.
I found it useful to keep an eye on the PMU exception rate
when using the perf tool. Since it's possible to take a completely
handled machine check on a System p box it also sounds like a good idea to
keep a machine check summary.
The event naming matches x86 to keep gratuitous differences to a minimum.
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Anton Blanchard [Sun, 31 Jan 2010 20:33:41 +0000 (20:33 +0000)]
powerpc: Remove whitespace in irq chip name fields
Now we use printf style alignment there is no need to manually space
these fields.
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Anton Blanchard [Sun, 31 Jan 2010 20:33:18 +0000 (20:33 +0000)]
powerpc: Rework /proc/interrupts
On a large machine I noticed the columns of /proc/interrupts failed to line up
with the header after CPU9. At sufficiently large numbers of CPUs it becomes
impossible to line up the CPU number with the counts.
While fixing this I noticed x86 has a number of updates that we may as well
pull in. On PowerPC we currently omit an interrupt completely if there is no
active handler, whereas on x86 it is printed if there is a non zero count.
The x86 code also spaces the first column correctly based on nr_irqs.
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Anton Blanchard [Sun, 31 Jan 2010 20:32:51 +0000 (20:32 +0000)]
powerpc: Reduce footprint of xics_ipi_struct
Right now we allocate a cacheline sized NR_CPUS array for xics IPI
communication. Use DECLARE_PER_CPU_SHARED_ALIGNED to put it in percpu
data in its own cacheline since it is written to by other cpus.
On a kernel with NR_CPUS=1024, this saves quite a lot of memory:
text data bss dec hex filename
8767779 2944260 1505724 13217763 c9afe3 vmlinux.irq_cpustat
8767555 2813444 1505724 13086723 c7b003 vmlinux.xics
A saving of around 128kB.
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Anton Blanchard [Sun, 31 Jan 2010 20:30:23 +0000 (20:30 +0000)]
powerpc: Reduce footprint of irq_stat
PowerPC is currently using asm-generic/hardirq.h which statically allocates an
NR_CPUS irq_stat array. Switch to an arch specific implementation which uses
per cpu data:
On a kernel with NR_CPUS=1024, this saves quite a lot of memory:
text data bss dec hex filename
8767938 2944132 1636796 13348866 cbb002 vmlinux.baseline
8767779 2944260 1505724 13217763 c9afe3 vmlinux.irq_cpustat
A saving of around 128kB.
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Breno Leitao [Wed, 3 Feb 2010 05:56:41 +0000 (05:56 +0000)]
powerpc/eeh: Fix a bug when pci structure is null
During a EEH recover, the pci_dev structure can be null, mainly if an
eeh event is detected during cpi config operation. In this case, the
pci_dev will not be known (and will be null) the kernel will crash
with the following message:
Unable to handle kernel paging request for data at address 0x000000a0
Faulting instruction address: 0xc00000000006b8b4
Oops: Kernel access of bad area, sig: 11 [#1]
NIP [
c00000000006b8b4] .eeh_event_handler+0x10c/0x1a0
LR [
c00000000006b8a8] .eeh_event_handler+0x100/0x1a0
Call Trace:
[
c0000003a80dff00] [
c00000000006b8a8] .eeh_event_handler+0x100/0x1a0
[
c0000003a80dff90] [
c000000000031f1c] .kernel_thread+0x54/0x70
The bug occurs because pci_name() tries to access a null pointer.
This patch just guarantee that pci_name() is not called on Null pointers.
Signed-off-by: Breno Leitao <leitao@linux.vnet.ibm.com>
Signed-off-by: Linas Vepstas <linasvepstas@gmail.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Corey Minyard [Wed, 3 Feb 2010 05:08:17 +0000 (05:08 +0000)]
powerpc: Add coherent_dma_mask to mv64x60 devices
DMA ops requires that coherent_dma_mask be set properly for a device,
but this was not being done for devices on the MV64x60 that use DMA.
Both the serial and ethernet devices need this or they won't be able
to allocate memory.
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Benjamin Herrenschmidt [Tue, 16 Feb 2010 23:00:42 +0000 (10:00 +1100)]
Merge commit 'origin/master' into next
Linus Torvalds [Tue, 16 Feb 2010 20:22:15 +0000 (12:22 -0800)]
Merge git://git./linux/kernel/git/agk/linux-2.6-dm
* git://git.kernel.org/pub/scm/linux/kernel/git/agk/linux-2.6-dm:
dm: sysfs revert add empty release function to avoid debug warning
dm mpath: fix stall when requeueing io
dm raid1: fix null pointer dereference in suspend
dm raid1: fail writes if errors are not handled and log fails
dm log: userspace fix overhead_size calcuations
dm snapshot: persistent annotate work_queue as on stack
dm stripe: avoid divide by zero with invalid stripe count
Linus Torvalds [Tue, 16 Feb 2010 19:59:01 +0000 (11:59 -0800)]
Merge branch 'release' of git://git./linux/kernel/git/aegl/linux-2.6
* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6:
[IA64] preserve personality flag bits across exec
Alasdair G Kergon [Tue, 16 Feb 2010 18:43:04 +0000 (18:43 +0000)]
dm: sysfs revert add empty release function to avoid debug warning
Revert commit
d2bb7df8cac647b92f51fb84ae735771e7adbfa7 at Greg's request.
Author: Milan Broz <mbroz@redhat.com>
Date: Thu Dec 10 23:51:53 2009 +0000
dm: sysfs add empty release function to avoid debug warning
This patch just removes an unnecessary warning:
kobject: 'dm': does not have a release() function,
it is broken and must be fixed.
The kobject is embedded in mapped device struct, so
code does not need to release memory explicitly here.
Cc: Greg KH <gregkh@suse.de>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Kiyoshi Ueda [Tue, 16 Feb 2010 18:43:01 +0000 (18:43 +0000)]
dm mpath: fix stall when requeueing io
This patch fixes the problem that system may stall if target's ->map_rq
returns DM_MAPIO_REQUEUE in map_request().
E.g. stall happens on 1 CPU box when a dm-mpath device with queue_if_no_path
bounces between all-paths-down and paths-up on I/O load.
When target's ->map_rq returns DM_MAPIO_REQUEUE, map_request() requeues
the request and returns to dm_request_fn(). Then, dm_request_fn()
doesn't exit the I/O dispatching loop and continues processing
the requeued request again.
This map and requeue loop can be done with interrupt disabled,
so 1 CPU system can be stalled if this situation happens.
For example, commands below can stall my 1 CPU box within 1 minute or so:
# dmsetup table mp
mp: 0
2097152 multipath 1 queue_if_no_path 0 1 1 service-time 0 1 2 8:144 1 1
# while true; do dd if=/dev/mapper/mp of=/dev/null bs=1M count=100; done &
# while true; do \
> dmsetup message mp 0 "fail_path 8:144" \
> dmsetup suspend --noflush mp \
> dmsetup resume mp \
> dmsetup message mp 0 "reinstate_path 8:144" \
> done
To fix the problem above, this patch changes dm_request_fn() to exit
the I/O dispatching loop once if a request is requeued in map_request().
Signed-off-by: Kiyoshi Ueda <k-ueda@ct.jp.nec.com>
Signed-off-by: Jun'ichi Nomura <j-nomura@ce.jp.nec.com>
Cc: stable@kernel.org
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Takahiro Yasui [Tue, 16 Feb 2010 18:42:58 +0000 (18:42 +0000)]
dm raid1: fix null pointer dereference in suspend
When suspending a failed mirror, bios are completed by mirror_end_io() and
__rh_lookup() in dm_rh_dec() returns NULL where a non-NULL return value is
required by design. Fix this by not changing the state of the recovery failed
region from DM_RH_RECOVERING to DM_RH_NOSYNC in dm_rh_recovery_end().
Issue
On 2.6.33-rc1 kernel, I hit the bug when I suspended the failed
mirror by dmsetup command.
BUG: unable to handle kernel NULL pointer dereference at
00000020
IP: [<
f94f38e2>] dm_rh_dec+0x35/0xa1 [dm_region_hash]
...
EIP: 0060:[<
f94f38e2>] EFLAGS:
00010046 CPU: 0
EIP is at dm_rh_dec+0x35/0xa1 [dm_region_hash]
EAX:
00000286 EBX:
00000000 ECX:
00000286 EDX:
00000000
ESI:
eff79eac EDI:
eff79e80 EBP:
f6915cd4 ESP:
f6915cc4
DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068
Process dmsetup (pid: 2849, ti=
f6914000 task=
eff03e80 task.ti=
f6914000)
...
Call Trace:
[<
f9530af6>] ? mirror_end_io+0x53/0x1b1 [dm_mirror]
[<
f9413104>] ? clone_endio+0x4d/0xa2 [dm_mod]
[<
f9530aa3>] ? mirror_end_io+0x0/0x1b1 [dm_mirror]
[<
f94130b7>] ? clone_endio+0x0/0xa2 [dm_mod]
[<
c02d6bcb>] ? bio_endio+0x28/0x2b
[<
f952f303>] ? hold_bio+0x2d/0x62 [dm_mirror]
[<
f952f942>] ? mirror_presuspend+0xeb/0xf7 [dm_mirror]
[<
c02aa3e2>] ? vmap_page_range+0xb/0xd
[<
f9414c8d>] ? suspend_targets+0x2d/0x3b [dm_mod]
[<
f9414ca9>] ? dm_table_presuspend_targets+0xe/0x10 [dm_mod]
[<
f941456f>] ? dm_suspend+0x4d/0x150 [dm_mod]
[<
f941767d>] ? dev_suspend+0x55/0x18a [dm_mod]
[<
c0343762>] ? _copy_from_user+0x42/0x56
[<
f9417fb0>] ? dm_ctl_ioctl+0x22c/0x281 [dm_mod]
[<
f9417628>] ? dev_suspend+0x0/0x18a [dm_mod]
[<
f9417d84>] ? dm_ctl_ioctl+0x0/0x281 [dm_mod]
[<
c02c3c4b>] ? vfs_ioctl+0x22/0x85
[<
c02c422c>] ? do_vfs_ioctl+0x4cb/0x516
[<
c02c42b7>] ? sys_ioctl+0x40/0x5a
[<
c0202858>] ? sysenter_do_call+0x12/0x28
Analysis
When recovery process of a region failed, dm_rh_recovery_end() function
changes the state of the region from RM_RH_RECOVERING to DM_RH_NOSYNC.
When recovery_complete() is executed between dm_rh_update_states() and
dm_writes() in do_mirror(), bios are processed with the region state,
DM_RH_NOSYNC. However, the region data is freed without checking its
pending count when dm_rh_update_states() is called next time.
When bios are finished by mirror_end_io(), __rh_lookup() in dm_rh_dec()
returns NULL even though a valid return value are expected.
Solution
Remove the state change of the recovery failed region from DM_RH_RECOVERING
to DM_RH_NOSYNC in dm_rh_recovery_end(). We can remove the state change
because:
- If the region data has been released by dm_rh_update_states(),
a new region data is created with the state of DM_RH_NOSYNC, and
bios are processed according to the DM_RH_NOSYNC state.
- If the region data has not been released by dm_rh_update_states(),
a state of the region is DM_RH_RECOVERING and bios are put in the
delayed_bio list.
The flag change from DM_RH_RECOVERING to DM_RH_NOSYNC in dm_rh_recovery_end()
was added in the following commit:
dm raid1: handle resync failures
author Jonathan Brassow <jbrassow@redhat.com>
Thu, 12 Jul 2007 16:29:04 +0000 (17:29 +0100)
http://git.kernel.org/linus/
f44db678edcc6f4c2779ac43f63f0b9dfa28b724
Signed-off-by: Takahiro Yasui <tyasui@redhat.com>
Reviewed-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Mikulas Patocka [Tue, 16 Feb 2010 18:42:55 +0000 (18:42 +0000)]
dm raid1: fail writes if errors are not handled and log fails
If the mirror log fails when the handle_errors option was not selected
and there is no remaining valid mirror leg, writes return success even
though they weren't actually written to any device. This patch
completes them with EIO instead.
This code path is taken:
do_writes:
bio_list_merge(&ms->failures, &sync);
do_failures:
if (!get_valid_mirror(ms)) (false)
else if (errors_handled(ms)) (false)
else bio_endio(bio, 0);
The logic in do_failures is based on presuming that the write was already
tried: if it succeeded at least on one leg (without handle_errors) it
is reported as success.
Reference: https://bugzilla.redhat.com/show_bug.cgi?id=555197
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Jonathan Brassow [Tue, 16 Feb 2010 18:42:53 +0000 (18:42 +0000)]
dm log: userspace fix overhead_size calcuations
This patch fixes two bugs that revolve around the miscalculation and
misuse of the variable 'overhead_size'. 'overhead_size' is the size of
the various header structures used during communication.
The first bug is the use of 'sizeof' with the pointer of a structure
instead of the structure itself - resulting in the wrong size being
computed. This is then used in a check to see if the payload
(data_size) would be to large for the preallocated structure. Since the
bug produces a smaller value for the overhead, it was possible for the
structure to be breached. (Although the current users of the code do
not currently send enough data to trigger this bug.)
The second bug is that the 'overhead_size' value is used to compute how
much of the preallocated space should be cleared before populating it
with fresh data. This should have simply been 'sizeof(struct cn_msg)'
not overhead_size. The fact that 'overhead_size' was computed
incorrectly made this problem "less bad" - leaving only a pointer's
worth of space at the end uncleared. Thus, this bug was never producing
a bad result, but still needs to be fixed - especially now that the
value is computed correctly.
Cc: stable@kernel.org
Signed-off-by: Jonathan Brassow <jbrassow@redhat.com
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Mike Snitzer [Tue, 16 Feb 2010 18:42:51 +0000 (18:42 +0000)]
dm snapshot: persistent annotate work_queue as on stack
chunk_io() declares its 'struct mdata_req' on the stack and then
initializes its 'struct work_struct' member. Annotate the
initialization of this workqueue with INIT_WORK_ON_STACK to suppress a
debugobjects warning seen when CONFIG_DEBUG_OBJECTS_WORK is enabled.
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Nikanth Karthikesan [Tue, 16 Feb 2010 18:42:47 +0000 (18:42 +0000)]
dm stripe: avoid divide by zero with invalid stripe count
If a table containing zero as stripe count is passed into stripe_ctr
the code attempts to divide by zero.
This patch changes DM_TABLE_LOAD to return -EINVAL if the stripe count
is zero.
We now get the following error messages:
device-mapper: table: 253:0: striped: Invalid stripe count
device-mapper: ioctl: error adding target to table
Signed-off-by: Nikanth Karthikesan <knikanth@suse.de>
Cc: stable@kernel.org
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Oleg Nesterov [Tue, 16 Feb 2010 14:24:01 +0000 (15:24 +0100)]
x86: ELF_PLAT_INIT() shouldn't worry about TIF_IA32
The 64-bit version of ELF_PLAT_INIT() clears TIF_IA32, but at this point
it has already been cleared by SET_PERSONALITY == set_personality_64bit.
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Oleg Nesterov [Tue, 16 Feb 2010 14:02:13 +0000 (15:02 +0100)]
x86: set_personality_ia32() misses force_personality32
05d43ed8a "x86: get rid of the insane TIF_ABI_PENDING bit" forgot about
force_personality32. Fix.
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Linus Torvalds [Tue, 16 Feb 2010 03:56:21 +0000 (19:56 -0800)]
Merge git://git./linux/kernel/git/mason/btrfs-unstable
* git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable:
Btrfs: btrfs_mark_extent_written uses the wrong slot
Linus Torvalds [Tue, 16 Feb 2010 03:54:54 +0000 (19:54 -0800)]
Merge branch 'for-linus' of git://git./linux/kernel/git/ieee1394/linux1394-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6:
firewire: ohci: retransmit isochronous transmit packets on cycle loss
firewire: net: fix panic in fwnet_write_complete
Linus Torvalds [Tue, 16 Feb 2010 03:54:18 +0000 (19:54 -0800)]
Merge branch 'fix/hda' of git://git./linux/kernel/git/tiwai/sound-2.6
* 'fix/hda' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6:
ALSA: hda - Correct ASUA blacklist for MSI brokenness
Chuck Lever [Mon, 15 Feb 2010 17:19:53 +0000 (12:19 -0500)]
NFS: Too many GETATTR and ACCESS calls after direct I/O
The cached read and write paths initialize fattr->time_start in their
setup procedures. The value of fattr->time_start is propagated to
read_cache_jiffies by nfs_update_inode(). Subsequent calls to
nfs_attribute_timeout() will then use a good time stamp when
computing the attribute cache timeout, and squelch unneeded GETATTR
calls.
Since the direct I/O paths erroneously leave the inode's
fattr->time_start field set to zero, read_cache_jiffies for that inode
is set to zero after any direct read or write operation. This
triggers an otw GETATTR or ACCESS call to update the file's attribute
and access caches properly, even when the NFS READ or WRITE replies
have usable post-op attributes.
Make sure the direct read and write setup code performs the same fattr
initialization as the cached I/O paths to prevent unnecessary GETATTR
calls.
This was likely introduced by commit
0e574af1 in 2.6.15, which appears
to add new nfs_fattr_init() call sites in the cached read and write
paths, but not in the equivalent places in fs/nfs/direct.c. A
subsequent commit in the same series,
33801147, introduces the
fattr->time_start field.
Interestingly, the direct write reschedule path already has a call to
nfs_fattr_init() in the right place.
Reported-by: Quentin Barnes <qbarnes@yahoo-inc.com>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Cc: stable@kernel.org
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Linus Torvalds [Tue, 16 Feb 2010 03:52:12 +0000 (19:52 -0800)]
Merge branch 'timers-fixes-for-linus' of git://git./linux/kernel/git/tip/linux-2.6-tip
* 'timers-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
hrtimer, softirq: Fix hrtimer->softirq trampoline
Linus Torvalds [Tue, 16 Feb 2010 03:51:45 +0000 (19:51 -0800)]
Merge branch 'reiserfs/kill-bkl' of git://git./linux/kernel/git/frederic/random-tracing
* 'reiserfs/kill-bkl' of git://git.kernel.org/pub/scm/linux/kernel/git/frederic/random-tracing:
reiserfs: Fix softlockup while waiting on an inode
Linus Torvalds [Tue, 16 Feb 2010 03:51:15 +0000 (19:51 -0800)]
Merge branch 'drm-linus' of git://git./linux/kernel/git/airlied/drm-2.6
* 'drm-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6:
drm/radeon/kms: make sure retry count increases.
drm/radeon/kms/atom: use get_unaligned_le32() for ctx->ps
drm/ttm: Fix a bug occuring when validating a buffer object in a range.
drm: Fix a bug in the range manager.
Linus Torvalds [Tue, 16 Feb 2010 03:50:34 +0000 (19:50 -0800)]
Merge branch 'sh/for-2.6.33' of git://git./linux/kernel/git/lethal/sh-2.6
* 'sh/for-2.6.33' of git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6:
sh64: fix tracing of signals.
Linus Torvalds [Tue, 16 Feb 2010 03:47:59 +0000 (19:47 -0800)]
Merge branch 'tracing-fixes-for-linus' of git://git./linux/kernel/git/tip/linux-2.6-tip
* 'tracing-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
tracing/kprobes: Fix probe parsing
tracing: Fix circular dead lock in stack trace
Linus Torvalds [Tue, 16 Feb 2010 03:47:48 +0000 (19:47 -0800)]
Merge branch 'perf-fixes-for-linus' of git://git./linux/kernel/git/tip/linux-2.6-tip
* 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
perf top: Fix help text alignment
perf: Fix hypervisor sample reporting
perf: Make bp_len type to u64 generic across the arch
Takashi Iwai [Mon, 15 Feb 2010 16:05:28 +0000 (17:05 +0100)]
ALSA: hda - Correct ASUA blacklist for MSI brokenness
The MSI blacklist entry for ASUS mobo added in the commit
8ce28d6abff34886d3797b25324c940471b99164 was based on the alsa-info
output wrongly posted. Fix the id to the right one now.
Reported-by: Sid Boyce <sboyce@blueyonder.co.uk>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Dave Airlie [Mon, 15 Feb 2010 05:24:48 +0000 (15:24 +1000)]
drm/radeon/kms: make sure retry count increases.
In testing I've never seen it go past 1 retry anyways but better
safe than sorry.
Reported by Droste on irc.
Signed-off-by: Dave Airlie <airlied@redhat.com>
Paul Mundt [Mon, 15 Feb 2010 05:17:45 +0000 (14:17 +0900)]
sh64: fix tracing of signals.
This follows the parisc change to ensure that tracehook_signal_handler()
is aware of when we are single-stepping in order to ptrace_notify()
appropriately. While this was implemented for 32-bit SH, sh64 neglected
to make use of TIF_SINGLESTEP when it was folded in with the 32-bit code,
resulting in ptrace_notify() never being called.
As sh64 uses all of the other abstractions already, this simply plugs in
the thread flag in the appropriate enable/disable paths and fixes up the
tracehook notification accordingly. With this in place, sh64 is brought
in line with what 32-bit is already doing.
Reported-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Matt Turner [Sun, 14 Feb 2010 01:20:19 +0000 (20:20 -0500)]
drm/radeon/kms/atom: use get_unaligned_le32() for ctx->ps
Noticed on a DEC Alpha.
Start up into console mode caused 15 unaligned accesses, and starting X
caused another 48.
Signed-off-by: Matt Turner <mattst88@gmail.com>
CC: Jerome Glisse <jglisse@redhat.com>
CC: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Thomas Hellstrom [Thu, 11 Feb 2010 23:18:00 +0000 (00:18 +0100)]
drm/ttm: Fix a bug occuring when validating a buffer object in a range.
If the buffer object was already in the requested memory type, but
outside of the requested range it was never moved into the requested range.
Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Thomas Hellstrom [Thu, 11 Feb 2010 23:17:59 +0000 (00:17 +0100)]
drm: Fix a bug in the range manager.
When searching for free space in a range, the function could return a node extending outside of the given range.
Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Frederic Weisbecker [Thu, 11 Feb 2010 12:13:10 +0000 (13:13 +0100)]
reiserfs: Fix softlockup while waiting on an inode
When we wait for an inode through reiserfs_iget(), we hold
the reiserfs lock. And waiting for an inode may imply waiting
for its writeback. But the inode writeback path may also require
the reiserfs lock, which leads to a deadlock.
We just need to release the reiserfs lock from reiserfs_iget()
to fix this.
Reported-by: Alexander Beregalov <a.beregalov@gmail.com>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Tested-by: Christian Kujau <lists@nerdbynature.de>
Cc: Chris Mason <chris.mason@oracle.com>
Clemens Ladisch [Mon, 8 Feb 2010 07:30:03 +0000 (08:30 +0100)]
firewire: ohci: retransmit isochronous transmit packets on cycle loss
In isochronous transmit DMA descriptors, link the skip address pointer
back to the descriptor itself. When a cycle is lost, the controller
will send the packet in the next cycle, instead of terminating the
entire DMA program.
There are two reasons for this:
* This behaviour is compatible with the old IEEE1394 stack. Old
applications would not expect the DMA program to stop in this case.
* Since the OHCI driver does not report any uncompleted packets, the
context would stop silently; clients would not have any chance to
detect and handle this error without a watchdog timer.
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Pieter Palmers notes:
"The reason I added this retry behavior to the old stack is because some
cards now and then fail to send a packet (e.g. the o2micro card in my
dell laptop). I couldn't figure out why exactly this happens, my best
guess is that the card cannot fetch the payload data on time. This
happens much more frequently when sending large packets, which leads me
to suspect that there are some contention issues with the DMA that fills
the transmit FIFO.
In the old stack it was a pretty critical issue as it resulted in a
freeze of the userspace application.
The omission of a packet doesn't necessarily have to be an issue. E.g.
in IEC61883 streams the DBC field can be used to detect discontinuities
in the stream. So as long as the other side doesn't bail when no
[packet] is present in a cycle, there is not really a problem.
I'm not convinced though that retrying is the proper solution, but it is
simple and effective for what it had to do. And I think there are no
reasons not to do it this way. Userspace can still detect this by
checking the cycle the descriptor was sent in."
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> (changelog, comment)
Kirill Smelkov [Fri, 12 Feb 2010 16:20:59 +0000 (19:20 +0300)]
perf top: Fix help text alignment
Print this:
Mapped keys:
[d] display refresh delay. (2)
[e] display entries (lines). (46)
[f] profile display filter (count). (5)
[F] annotate display filter (percent). (5%)
[s] annotate symbol. (NULL)
[S] stop annotation.
[K] hide kernel_symbols symbols. (no)
[U] hide user symbols. (no)
[z] toggle sample zeroing. (0)
[qQ] quit.
instead of:
Mapped keys:
[d] display refresh delay. (2)
[e] display entries (lines). (46)
[f] profile display filter (count). (5)
[F] annotate display filter (percent). (5%)
[s] annotate symbol. (NULL)
[S] stop annotation.
[K] hide kernel_symbols symbols. (no)
[U] hide user symbols. (no)
[z] toggle sample zeroing. (0)
[qQ] quit.
Signed-off-by: Kirill Smelkov <kirr@landau.phys.spbu.ru>
Acked-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
LKML-Reference: <
20100212162059.GA30041@landau.phys.spbu.ru>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Heiko Carstens [Wed, 10 Feb 2010 16:23:47 +0000 (17:23 +0100)]
tracing/kprobes: Fix probe parsing
Trying to add a probe like:
echo p:myprobe 0x10000 > /sys/kernel/debug/tracing/kprobe_events
will fail since the wrong pointer is passed to strict_strtoul
when trying to convert the address to an unsigned long.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Acked-by: Masami Hiramatsu <mhiramat@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
LKML-Reference: <
20100210162346.GA6933@osiris.boeblingen.de.ibm.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Shaohua Li [Thu, 11 Feb 2010 07:43:00 +0000 (07:43 +0000)]
Btrfs: btrfs_mark_extent_written uses the wrong slot
My test do: fallocate a big file and do write. The file is 512M, but
after file write is done btrfs-debug-tree shows:
item 6 key (257 EXTENT_DATA 0) itemoff 3516 itemsize 53
extent data disk byte
1103101952 nr
536870912
extent data offset 0 nr
399634432 ram
536870912
extent compression 0
Looks like a regression introducted by
6c7d54ac87f338c479d9729e8392eca3f76e11e1, where we set wrong slot.
Signed-off-by: Shaohua Li <shaohua.li@intel.com>
Acked-by: Yan Zheng <zheng.yan@oracle.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Linus Torvalds [Fri, 12 Feb 2010 19:07:45 +0000 (11:07 -0800)]
Linux 2.6.33-rc8
Linus Torvalds [Fri, 12 Feb 2010 18:12:28 +0000 (10:12 -0800)]
Merge branch 'fix/hda' of git://git./linux/kernel/git/tiwai/sound-2.6
* 'fix/hda' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6:
ALSA: hda - use WARN_ON_ONCE() for zero-division detection
Linus Torvalds [Fri, 12 Feb 2010 17:32:10 +0000 (09:32 -0800)]
Merge branch 'for-linus' of git://git./linux/kernel/git/anholt/drm-intel
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/anholt/drm-intel:
drm/i915: hold ref on flip object until it completes
drm/i915: Fix crash while aborting hibernation
drm/i915: Correctly return -ENOMEM on allocation failure in cmdbuf ioctls.
drm/i915: fix pipe source image setting in flip command
drm/i915: fix flip done interrupt on Ironlake
drm/i915: untangle page flip completion
drm/i915: handle FBC and self-refresh better
drm/i915: Increase fb alignment to 64k
drm/i915: Update write_domains on active list after flush.
drm/i915: Rework DPLL calculation parameters for Ironlake
Takashi Iwai [Fri, 12 Feb 2010 17:17:06 +0000 (18:17 +0100)]
ALSA: hda - use WARN_ON_ONCE() for zero-division detection
Replace the zero-division warning message with WARN_ON_ONCE() per the
advice by Linus. This shouldn't happen, but if it happens, it's
possible that the bug happens often due to buggy IRQs.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Kyle McMartin [Fri, 12 Feb 2010 15:53:08 +0000 (10:53 -0500)]
parisc: fix tracing of signals
Mike Frysinger pointed out that calling tracehook_signal_handler with
stepping=0 missed testing the thread flags, resulting in not calling
ptrace_notify. Fix this by testing if we're single stepping or branch
stepping and setting the flag accordingly.
Tested, seems to work.
Reported-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Kyle McMartin <kyle@mcmartin.ca>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Linus Torvalds [Fri, 12 Feb 2010 16:48:47 +0000 (08:48 -0800)]
Merge branch 'fix/hda' of git://git./linux/kernel/git/tiwai/sound-2.6
* 'fix/hda' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6:
ALSA: hda-intel: Avoid divide by zero crash
Linus Torvalds [Fri, 12 Feb 2010 16:48:35 +0000 (08:48 -0800)]
Merge branch 'for-linus' of git://git./linux/kernel/git/lrg/voltage-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/lrg/voltage-2.6:
regulator/lp3971: vol_map out of bounds in lp3971_{ldo,dcdc}_set_voltage()
regulator: Fix display of null constraints for regulators
Linus Torvalds [Fri, 12 Feb 2010 16:46:23 +0000 (08:46 -0800)]
Merge git://git./linux/kernel/git/steve/gfs2-2.6-fixes
* git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-2.6-fixes:
GFS2: Fix bmap allocation corner-case bug
GFS2: Fix error code
Tony Luck [Fri, 12 Feb 2010 16:17:58 +0000 (08:17 -0800)]
[IA64] preserve personality flag bits across exec
In its <asm/elf.h> ia64 defines SET_PERSONALITY in a way that unconditionally
sets the personality of the current process to PER_LINUX, losing any flag bits
from the upper 3 bytes of current->personality. This is wrong. Those bits are
intended to be inherited across exec (other code takes care of ensuring that
security sensitive bits like ADDR_NO_RANDOMIZE are not passed to unsuspecting
setuid/setgid applications).
Signed-off-by: Tony Luck <tony.luck@intel.com>
Roel Kluin [Fri, 12 Feb 2010 11:30:21 +0000 (12:30 +0100)]
regulator/lp3971: vol_map out of bounds in lp3971_{ldo,dcdc}_set_voltage()
After `for (val = LDO_VOL_MIN_IDX; val <= LDO_VOL_MAX_IDX; val++)', if no break
occurs, val reaches LDO_VOL_MIN_IDX + 1, which is out of bounds for
ldo45_voltage_map[] and ldo123_voltage_map[].
Similarly BUCK_TARGET_VOL_MAX_IDX + 1 is out of bounds for buck_voltage_map[].
Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
Mark Brown [Thu, 11 Feb 2010 19:20:48 +0000 (19:20 +0000)]
regulator: Fix display of null constraints for regulators
If the regulator constraints are empty and there is no voltage
reported then nothing will be added to the text displayed for the
constraints, leading to random stack data being printed. This is
unlikely to happen for practical regulators since most will at
least report a voltage but should still be fixed.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Cc: stable@kernel.org
Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
Steven Whitehouse [Fri, 12 Feb 2010 10:10:55 +0000 (10:10 +0000)]
GFS2: Fix bmap allocation corner-case bug
This patch solves a corner case during allocation which occurs if both
metadata (indirect) and data blocks are required but there is an
obstacle in the filesystem (e.g. a resource group header or another
allocated block) such that when the allocation is requested only
enough blocks for the metadata are returned.
By changing the exit condition of this loop, we ensure that a
minimum of one data block will always be returned.
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
Abhijith Das [Fri, 5 Feb 2010 23:25:41 +0000 (18:25 -0500)]
GFS2: Fix error code
We need this one-liner to signal the mount helper of the 'insufficient journals' condition.
Signed-off-by: Abhijith Das <adas@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
Linus Torvalds [Thu, 11 Feb 2010 22:28:03 +0000 (14:28 -0800)]
Merge branch 'omap-fixes-for-linus' of git://git./linux/kernel/git/tmlind/linux-omap-2.6
* 'omap-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap-2.6:
OMAP: hsmmc: fix memory leak
Linus Torvalds [Thu, 11 Feb 2010 22:07:13 +0000 (14:07 -0800)]
Merge branch 'for-linus' of git://git./linux/kernel/git/bp/bp
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/bp/bp:
amd64_edac: Do not falsely trigger kerneloops
Linus Torvalds [Thu, 11 Feb 2010 22:07:00 +0000 (14:07 -0800)]
Merge branch 'for-linus' of git://git.kernel.dk/linux-2.6-block
* 'for-linus' of git://git.kernel.dk/linux-2.6-block:
cciss: Make cciss_seq_show handle holes in the h->drv[] array
cfq-iosched: split seeky coop queues after one slice
Linus Torvalds [Thu, 11 Feb 2010 22:06:28 +0000 (14:06 -0800)]
Merge branch 'bugfixes' of git://git.linux-nfs.org/projects/trondmy/nfs-2.6
* 'bugfixes' of git://git.linux-nfs.org/projects/trondmy/nfs-2.6:
NFS: Fix the mapping of the NFSERR_SERVERFAULT error
NFS: Remove a redundant check for PageFsCache in nfs_migrate_page()
NFS: Fix a bug in nfs_fscache_release_page()
Linus Torvalds [Thu, 11 Feb 2010 22:06:15 +0000 (14:06 -0800)]
Merge git://git.infradead.org/users/cbou/battery-2.6.33
* git://git.infradead.org/users/cbou/battery-2.6.33:
wm97xx_battery: Handle missing platform data gracefully
Linus Torvalds [Thu, 11 Feb 2010 22:05:55 +0000 (14:05 -0800)]
Merge git://git./linux/kernel/git/jejb/scsi-rc-fixes-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-rc-fixes-2.6:
[SCSI] qla2xxx: Obtain proper host structure during response-queue processing.
[SCSI] compat_ioct: fix bsg SG_IO
[SCSI] qla2xxx: make msix interrupt handler safe for irq
[SCSI] zfcp: Report FC BSG errors in correct field
[SCSI] mptfusion : mptscsih_abort return value should be SUCCESS instead of value 0.
Linus Torvalds [Thu, 11 Feb 2010 22:03:42 +0000 (14:03 -0800)]
Merge branch 'for-linus' of git://git./linux/kernel/git/dtor/input
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
Input: psmouse - make sure we don't schedule reconnects after cleanup
Linus Torvalds [Thu, 11 Feb 2010 22:03:28 +0000 (14:03 -0800)]
Merge branch 'drm-linus' of git://git./linux/kernel/git/airlied/drm-2.6
* 'drm-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6: (30 commits)
vgaarb: fix incorrect dereference of userspace pointer.
drm/radeon/kms: retry auxch on 0x20 timeout value.
drm/radeon: Skip dma copy test in benchmark if card doesn't have dma engine.
drm/vmwgfx: Fix a circular locking dependency bug.
drm/vmwgfx: Drop scanout flag compat and add execbuf ioctl parameter members. Bumps major.
drm/vmwgfx: Report propper framebuffer_{max|min}_{width|height}
drm/vmwgfx: Update the user-space interface.
drm/radeon/kms: fix screen clearing before fbcon.
nouveau: fix state detection with switchable graphics
drm/nouveau: move dereferences after null checks
drm/nv50: make the pgraph irq handler loop like the pre-nv50 version
drm/nv50: delete ramfc object after disabling fifo, not before
drm/nv50: avoid unloading pgraph context when ctxprog is running
drm/nv50: align size of buffer object to the right boundaries.
drm/nv50: disregard dac outputs in nv50_sor_dpms()
drm/nv50: prevent multiple init tables being parsed at the same time
drm/nouveau: make dp auxch xfer len check for reads only
drm/nv40: make INIT_COMPUTE_MEM a NOP, just like nv50
drm/nouveau: Add proper vgaarb support.
drm/nouveau: Fix fbcon on mixed pre-NV50 + NV50 multicard.
...
Linus Torvalds [Thu, 11 Feb 2010 22:02:27 +0000 (14:02 -0800)]
Merge branch 'fixes' of git://git./linux/kernel/git/djbw/async_tx
* 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/async_tx:
drivers/dma: Correct NULL test
async-tx: fix buffer submission error handling in ipu_idma.c
dmaengine: correct onstack wait_queue_head declaration
ioat: fix infinite timeout checking in ioat2_quiesce
dmaengine: fix memleak in dma_async_device_unregister
Linus Torvalds [Thu, 11 Feb 2010 22:01:46 +0000 (14:01 -0800)]
Merge branch 'upstream' of git://ftp.linux-mips.org/upstream-linus
* 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus:
MIPS: Don't probe reserved EntryHi bits.
MIPS: SNI: Correct NULL test
MIPS: Fix __devinit __cpuinit confusion in cpu_cache_init
MIPS: IP27: Make defconfig useful again.
MIPS: Fixup of the r4k timer
Linus Torvalds [Thu, 11 Feb 2010 22:01:25 +0000 (14:01 -0800)]
Merge branch 'for-linus' of git://git./linux/kernel/git/roland/infiniband
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband:
RDMA/cm: Revert association of an RDMA device when binding to loopback
Linus Torvalds [Thu, 11 Feb 2010 22:01:10 +0000 (14:01 -0800)]
Merge branch 'x86-fixes-for-linus' of git://git./linux/kernel/git/tip/linux-2.6-tip
* 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
x86, apic: Don't use logical-flat mode when CPU hotplug may exceed 8 CPUs
x86-32: Make AT_VECTOR_SIZE_ARCH=2
x86/agp: Fix amd64-agp module initialization regression
x86, doc: Fix minor spelling error in arch/x86/mm/gup.c
Linus Torvalds [Thu, 11 Feb 2010 22:00:27 +0000 (14:00 -0800)]
Merge git://git./linux/kernel/git/davem/sparc-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6:
sparc32: Fix thinko in previous change.
sparc: Align clone and signal stacks to 16 bytes.
Michael Neuling [Wed, 10 Feb 2010 21:56:42 +0000 (13:56 -0800)]
fs/exec.c: restrict initial stack space expansion to rlimit
When reserving stack space for a new process, make sure we're not
attempting to expand the stack by more than rlimit allows.
This fixes a bug caused by
b6a2fea39318e43fee84fa7b0b90d68bed92d2ba ("mm:
variable length argument support") and unmasked by
fc63cf237078c86214abcb2ee9926d8ad289da9b ("exec: setup_arg_pages() fails
to return errors").
This bug means that when limiting the stack to less the 20*PAGE_SIZE (eg.
80K on 4K pages or 'ulimit -s 79') all processes will be killed before
they start. This is particularly bad with 64K pages, where a ulimit below
1280K will kill every process.
To test, do:
'ulimit -s 15; ls'
before and after the patch is applied. Before it's applied, 'ls' should
be killed. After the patch is applied, 'ls' should no longer be killed.
A stack limit of 15KB since it's small enough to trigger 20*PAGE_SIZE.
Also 15KB not a multiple of PAGE_SIZE, which is a trickier case to handle
correctly with this code.
4K pages should be fine to test with.
[kosaki.motohiro@jp.fujitsu.com: cleanup]
[akpm@linux-foundation.org: cleanup cleanup]
Signed-off-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Americo Wang <xiyou.wangcong@gmail.com>
Cc: Anton Blanchard <anton@samba.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: James Morris <jmorris@namei.org>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Serge Hallyn <serue@us.ibm.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Andreas Schwab [Wed, 10 Feb 2010 21:56:40 +0000 (13:56 -0800)]
compat_ioctl: add compat handler for TIOCGSID ioctl
This is used by tcgetsid(3).
Signed-off-by: Andreas Schwab <schwab@linux-m68k.org>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Rishikesh [Wed, 10 Feb 2010 21:56:40 +0000 (13:56 -0800)]
MAINTAINERS: changed LTP maintainership responsibilities
Change the LTP maintainer responsibities from 2010.
Ref: http://marc.info/?l=ltp-list&m=
126502242912536&w=2
Signed-off-by : Rishikesh K Rajak <risrajak@linux.vnet.ibm.com>
Cc: Subrata Modak <subrata@linux.vnet.ibm.com>
Cc: Mike Frysinger <vapier@gentoo.org>
Cc: Garrett Cooper <yanegomi@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Peter Tyser [Wed, 10 Feb 2010 21:56:37 +0000 (13:56 -0800)]
edac: mpc85xx fix build regression by removing unused debug code
Some unused, unsupported debug code existed in the mpc85xx EDAC driver
that resulted in a build failure when CONFIG_EDAC_DEBUG was defined:
drivers/edac/mpc85xx_edac.c: In function 'mpc85xx_mc_err_probe':
drivers/edac/mpc85xx_edac.c:1031: error: implicit declaration of function 'edac_mc_register_mcidev_debug'
drivers/edac/mpc85xx_edac.c:1031: error: 'debug_attr' undeclared (first use in this function)
drivers/edac/mpc85xx_edac.c:1031: error: (Each undeclared identifier is reported only once
drivers/edac/mpc85xx_edac.c:1031: error: for each function it appears in.)
Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
Signed-off-by: Doug Thompson <dougthompson@xmission.com
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Peter Tyser [Wed, 10 Feb 2010 21:56:36 +0000 (13:56 -0800)]
edac: mpc85xx fix bad page calculation
Commit
b4846251727a38a7f248e41308c060995371dd05 ("edac: mpc85xx add
mpc83xx support") accidentally broke how a chip select's first and last
page addresses are calculated. The page addresses are being shifted too
far right by PAGE_SHIFT. This results in errors such as:
EDAC MPC85xx MC1: Err addr: 0x003075c0
EDAC MPC85xx MC1: PFN: 0x00000307
EDAC MPC85xx MC1: PFN out of range!
EDAC MC1: INTERNAL ERROR: row out of range (4 >= 4)
EDAC MC1: CE - no information available: INTERNAL ERROR
The vaule of PAGE_SHIFT is already being taken into consideration during
the calculation of the 'start' and 'end' variables, thus it is not
necessary to account for it again when setting a chip select's first and
last page address.
Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
Signed-off-by: Doug Thompson <dougthompson@xmission.com>
Cc: Ira W. Snyder <iws@ovro.caltech.edu>
Cc: Kumar Gala <galak@gate.crashing.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Johan Kristell [Wed, 10 Feb 2010 21:56:34 +0000 (13:56 -0800)]
mmc_test: block addressed cards
This patch fixes a bug in the multiblock write tests where the written
data is read back for verifying one block at a time. The tests in
mmc_test assumes that all cards are byte addressable.
This will cause the multi block write tests to fail, leading the user of
the mmc_test driver thinking there is something wrong with the sdhci
driver they are testing.
The start address for the block is calculated as: blocknum * 512. For
block addressable cards the blocknum alone should be used.
Signed-off-by: Johan Kristell <johan.kristell@axis.com>
Cc: <linux-mmc@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Marcel Selhorst [Wed, 10 Feb 2010 21:56:32 +0000 (13:56 -0800)]
tpm_infineon: fix suspend/resume handler for pnp_driver
When suspending, tpm_infineon calls the generic suspend function of the
TPM framework. However, the TPM framework does not return and the system
hangs upon suspend. When sending the necessary command "TPM_SaveState"
directly within the driver, suspending and resuming works fine.
Signed-off-by: Marcel Selhorst <m.selhorst@sirrix.com>
Cc: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
Cc: Debora Velarde <debora@linux.vnet.ibm.com>
Cc: Rajiv Andrade <srajiv@linux.vnet.ibm.com>
Cc: <stable@kernel.org> [2.6.32.x]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
David S. Miller [Thu, 11 Feb 2010 20:29:16 +0000 (12:29 -0800)]
sparc32: Fix thinko in previous change.
Should mask stack with 0xf not "0x15".
Noticed by Blue Swirl <blauwirbel@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Borislav Petkov [Thu, 11 Feb 2010 16:15:57 +0000 (17:15 +0100)]
amd64_edac: Do not falsely trigger kerneloops
An unfortunate "WARNING" in the message amd64_edac dumps when the system
doesn't support DRAM ECC or ECC checking is not enabled in the BIOS
used to trigger kerneloops which qualified the message as an OOPS thus
misleading the users. See, e.g.
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/422536
http://bugzilla.kernel.org/show_bug.cgi?id=15238
Downgrade the message level to KERN_NOTICE and fix the formulation.
Cc: stable@kernel.org # .32.x
Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
Acked-by: Doug Thompson <dougthompson@xmission.com>
Andy Getzendanner [Thu, 11 Feb 2010 04:04:48 +0000 (14:04 +1000)]
vgaarb: fix incorrect dereference of userspace pointer.
This patch corrects a userspace pointer dereference in the VGA arbiter
in 2.6.32.1.
copy_from_user() is used at line 822 to copy the contents of buf into
kbuf, but a call to strncmp() on line 964 uses buf rather than kbuf. This
problem led to a GPF in strncmp() when X was started on my x86_32 systems.
X triggered the behavior with a write of "target PCI:0000:01:00.0" to
/dev/vga_arbiter.
The patch has been tested against 2.6.32.1 and observed to correct the GPF
observed when starting X or manually writing the string "target
PCI:0000:01:00.0" to /dev/vga_arbiter.
Signed-off-by: Andy Getzendanner <james.getzendanner@students.olin.edu>
Cc: Jesse Barnes <jbarnes@virtuousgeek.org>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Dave Airlie [Thu, 11 Feb 2010 04:03:51 +0000 (14:03 +1000)]
Merge branch 'drm-radeon-linus' of ../drm-next
* 'drm-radeon-linus' of ../drm-next:
drm/radeon/kms: retry auxch on 0x20 timeout value.
drm/radeon: Skip dma copy test in benchmark if card doesn't have dma engine.
drm/radeon/kms: fix screen clearing before fbcon.
drm/radeon/kms: add quirk for VGA without DDC on rv730 XFX card.
drm/radeon/kms: don't crash if no DDC bus on VGA/DVI connector.
drm/radeon/kms: change Kconfig text to reflect the new option.
drm/radeon/kms: suspend and resume audio stuff
Dave Airlie [Wed, 10 Feb 2010 06:52:45 +0000 (16:52 +1000)]
drm/radeon/kms: retry auxch on 0x20 timeout value.
ATOM appears to return 0x20 which seems to mean some sort of timeout.
retry the transaction up to 10 times before failing, this
makes DP->VGA convertor we bought work at least a bit more predictably.
Signed-off-by: Dave Airlie <airlied@redhat.com>
Pauli Nieminen [Wed, 10 Feb 2010 22:10:33 +0000 (00:10 +0200)]
drm/radeon: Skip dma copy test in benchmark if card doesn't have dma engine.
radeon_copy_dma is only available for r200 or newer cards.
Call to radeon_copy_dma would result to NULL pointer
dereference if benchmarking asic without dma engine.
Signed-off-by: Pauli Nieminen <suokkos@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Dave Airlie [Thu, 11 Feb 2010 02:10:48 +0000 (12:10 +1000)]
Merge remote branch 'nouveau/for-airlied' of nouveau-2.6
* 'nouveau/for-airlied' of /home/airlied/kernel/drm-next:
nouveau: fix state detection with switchable graphics
drm/nouveau: move dereferences after null checks
drm/nv50: make the pgraph irq handler loop like the pre-nv50 version
drm/nv50: delete ramfc object after disabling fifo, not before
drm/nv50: avoid unloading pgraph context when ctxprog is running
drm/nv50: align size of buffer object to the right boundaries.
drm/nv50: disregard dac outputs in nv50_sor_dpms()
drm/nv50: prevent multiple init tables being parsed at the same time
drm/nouveau: make dp auxch xfer len check for reads only
drm/nv40: make INIT_COMPUTE_MEM a NOP, just like nv50
drm/nouveau: Add proper vgaarb support.
drm/nouveau: Fix fbcon on mixed pre-NV50 + NV50 multicard.
drivers/gpu/drm/nouveau/nouveau_grctx.c: correct NULL test
drm/nouveau: call ttm_bo_wait with the bo lock held to prevent hang
drm/nouveau: Fixup semaphores on pre-nv50 cards.
drm/nouveau: Add getparam to get available PGRAPH units.
drm/nouveau: Add module options to disable acceleration.
drm/nouveau: fix non-vram notifier blocks
Thomas Hellstrom [Mon, 8 Feb 2010 09:57:25 +0000 (09:57 +0000)]
drm/vmwgfx: Fix a circular locking dependency bug.
Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Jakob Bornecrantz [Tue, 9 Feb 2010 21:29:47 +0000 (21:29 +0000)]
drm/vmwgfx: Drop scanout flag compat and add execbuf ioctl parameter members. Bumps major.
Even if this bumps the version to 1 it does not mean the driver is
out of staging. From what we know this is the last backwards
incompatible change to the driver.
Signed-off-by: Jakob Bornecrantz <jakob@vmware.com>
Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Jakob Bornecrantz [Tue, 9 Feb 2010 19:41:57 +0000 (19:41 +0000)]
drm/vmwgfx: Report propper framebuffer_{max|min}_{width|height}
Signed-off-by: Jakob Bornecrantz <jakob@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Thomas Hellstrom [Tue, 9 Feb 2010 19:41:55 +0000 (19:41 +0000)]
drm/vmwgfx: Update the user-space interface.
When time-based throttling is implemented, we need to bump minor.
When the old way of detecting scanout is removed, we need to bump major.
In the meantime, this change should not break existing user-space.
Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: Jakob Bornecrantz <jakob@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Jesse Barnes [Wed, 10 Feb 2010 23:09:44 +0000 (15:09 -0800)]
drm/i915: hold ref on flip object until it completes
This will prevent things from falling over if the user frees the flip
buffer before we complete the flip, since we'll hold an internal
reference.
Reported-by: Kristian Høgsberg <krh@bitplanet.net>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Eric Anholt <eric@anholt.net>
Rafael J. Wysocki [Sun, 7 Feb 2010 20:48:24 +0000 (21:48 +0100)]
drm/i915: Fix crash while aborting hibernation
Commit
cbda12d77ea590082edb6d30bd342a67ebc459e0 (drm/i915: implement
new pm ops for i915) introduced the problem that if s2disk hibernation
is aborted, the system will crash, because i915_pm_freeze() does
nothing, while it should at least reverse some operations carried out
by i915_suspend().
Fix this issue by splitting the i915 suspend into a freeze part a
suspend part, where the latter is not executed before creating a
hibernation image, and the i915 resume into a "low-level" resume part
and a thaw part, where the former is not executed after the image has
been created.
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Tested-by: Alan Jenkins <alan-jenkins@tuffmail.co.uk>
Signed-off-by: Eric Anholt <eric@anholt.net>
Dave Airlie [Tue, 9 Feb 2010 02:31:08 +0000 (12:31 +1000)]
drm/radeon/kms: fix screen clearing before fbcon.
This memset_io was added to debug something way back and got
left behind, memset the fb to black so the borders don't be all white.
Signed-off-by: Dave Airlie <airlied@redhat.com>
Matthew Garrett [Wed, 10 Feb 2010 10:50:34 +0000 (20:50 +1000)]
nouveau: fix state detection with switchable graphics
Signed-off-by: Matthew Garrett <mjg@redhat.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Marcin Slusarz [Sat, 30 Jan 2010 14:41:00 +0000 (15:41 +0100)]
drm/nouveau: move dereferences after null checks
Reported-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: Marcin Slusarz <marcin.slusarz@gmail.com>
Signed-off-by: Maarten Maathuis <madman2003@gmail.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Owain Ainsworth [Tue, 9 Feb 2010 14:25:55 +0000 (14:25 +0000)]
drm/i915: Correctly return -ENOMEM on allocation failure in cmdbuf ioctls.
Signed-off-by: Owain G. Ainsworth <oga@openbsd.org>
Signed-off-by: Eric Anholt <eric@anholt.net>
Zhenyu Wang [Tue, 9 Feb 2010 01:46:20 +0000 (09:46 +0800)]
drm/i915: fix pipe source image setting in flip command
The MI_DISPLAY_FLIP command needs to be set the same pipe
source image like in pipe source register, e.g source image
size minus one. This fixes screen corrupt issue on Ironlake.
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Signed-off-by: Eric Anholt <eric@anholt.net>
Zhenyu Wang [Tue, 9 Feb 2010 01:46:19 +0000 (09:46 +0800)]
drm/i915: fix flip done interrupt on Ironlake
On Ironlake plane flip interrupt means flip done event already, the
behavior is not like old chips, and perform like other usual interrupt.
So only need to handle flip done event when receiving that interrupt.
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Signed-off-by: Eric Anholt <eric@anholt.net>
Jesse Barnes [Tue, 26 Jan 2010 22:40:05 +0000 (14:40 -0800)]
drm/i915: untangle page flip completion
When a new page flip is requested, we need to both queue an unpin for
the current framebuffer, and also increment the flip pending count on
the newly submitted buffer.
At flip finish time, we need to unpin the old fb and decrement the flip
pending count on the new buffer.
The old code was conflating the two, and led to hangs when new direct
rendered apps were started, replacing the existing frame buffer. This
patch splits out the buffers and prevents the hangs.
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Kristian Høgsberg <krh@bitplanet.net>
Signed-off-by: Eric Anholt <eric@anholt.net>
Jesse Barnes [Sat, 6 Feb 2010 18:41:53 +0000 (10:41 -0800)]
drm/i915: handle FBC and self-refresh better
On 945, we need to avoid entering self-refresh if the compressor is
busy, or we may cause display FIFO underruns leading to ugly flicker.
Fixes fdo bug #24314, kernel bug #15043.
Tested-by: Alexander Lam <lambchop468@gmail.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Tested-by: Julien Cristau <jcristau@debian.org> (fd.o #25371)
Cc: stable@kernel.org
Signed-off-by: Eric Anholt <eric@anholt.net>
Chris Wilson [Tue, 9 Feb 2010 14:14:36 +0000 (14:14 +0000)]
drm/i915: Increase fb alignment to 64k
An untiled framebuffer must be aligned to 64k. This is normally handled
by intel_pin_and_fence_fb_obj(), but the intelfb_create() likes to be
different and do the pinning itself. However, it aligns the buffer
object incorrectly for pre-i965 chipsets causing a PGTBL_ERR when it is
installed onto the output.
Fixes:
KMS error message while initializing modesetting -
render error detected: EIR: 0x10 [i915]
http://bugs.freedesktop.org/show_bug.cgi?id=22936
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: stable@kernel.org
Signed-off-by: Eric Anholt <eric@anholt.net>
Daniel Vetter [Sun, 7 Feb 2010 15:20:18 +0000 (16:20 +0100)]
drm/i915: Update write_domains on active list after flush.
Before changing the status of a buffer with a pending write we will await
upon a new flush for that buffer. So we can take advantage of any flushes
posted whilst the buffer is active and pending processing by the GPU, by
clearing its write_domain and updating its last_rendering_seqno -- thus
saving a potential flush in deep queues and improves flushing behaviour
upon eviction for both GTT space and fences.
In order to reduce the time spent searching the active list for matching
write_domains, we move those to a separate list whose elements are
the buffers belong to the active/flushing list with pending writes.
Orignal patch by Chris Wilson <chris@chris-wilson.co.uk>, forward-ported
by me.
In addition to better performance, this also fixes a real bug. Before
this changes, i915_gem_evict_everything didn't work as advertised. When
the gpu was actually busy and processing request, the flush and subsequent
wait would not move active and dirty buffers to the inactive list, but
just to the flushing list. Which triggered the BUG_ON at the end of this
function. With the more tight dirty buffer tracking, all currently busy and
dirty buffers get moved to the inactive list by one i915_gem_flush operation.
I've left the BUG_ON I've used to prove this in there.
References:
Bug 25911 - 2.10.0 causes kernel oops and system hangs
http://bugs.freedesktop.org/show_bug.cgi?id=25911
Bug 26101 - [i915] xf86-video-intel 2.10.0 (and git) triggers kernel oops
within seconds after login
http://bugs.freedesktop.org/show_bug.cgi?id=26101
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Tested-by: Adam Lantos <hege@playma.org>
Cc: stable@kernel.org
Signed-off-by: Eric Anholt <eric@anholt.net>
David Daney [Mon, 8 Feb 2010 20:27:00 +0000 (12:27 -0800)]
MIPS: Don't probe reserved EntryHi bits.
The patch that adds cpu_probe_vmbits is erroneously writing to reserved
bit 12. Since we are really only probing high bits, don't write this bit
with a one.
Signed-off-by: David Daney <ddaney@caviumnetworks.com>
To: linux-mips@linux-mips.org
Cc: Guenter Roeck <guenter.roeck@ericsson.com>
Patchwork: http://patchwork.linux-mips.org/patch/949/
Acked-by: Guenter Roeck <guenter.roeck@ericsson.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>