GitHub/LineageOS/android_kernel_samsung_universal7580.git
14 years agofremap: get rid of broken 'end' variable
Linus Torvalds [Fri, 24 Sep 2010 21:13:57 +0000 (14:13 -0700)]
fremap: get rid of broken 'end' variable

Thomas Pollet points out that the 'end' variable is broken.  It was
computed based on start/size before they were page-aligned, and as such
doesn't actually match any of the other actions we take.  The overflow
test on end was also redundant, since we had already tested it with the
properly aligned version.

So just get rid of it entirely.  The one remaining use for that broken
variable can just use 'start+size' like all the other cases already did.

Reported-by: Thomas Pollet <thomas.pollet@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
14 years agoMerge branch 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jlbec...
Linus Torvalds [Fri, 24 Sep 2010 21:08:15 +0000 (14:08 -0700)]
Merge branch 'upstream-linus' of git://git./linux/kernel/git/jlbec/ocfs2

* 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jlbec/ocfs2:
  o2dlm: force free mles during dlm exit
  ocfs2: Sync inode flags with ext2.
  ocfs2: Move 'wanted' into parens of ocfs2_resmap_resv_bits.
  ocfs2: Use cpu_to_le16 for e_leaf_clusters in ocfs2_bg_discontig_add_extent.
  ocfs2: update ctime when changing the file's permission by setfacl
  ocfs2/net: fix uninitialized ret in o2net_send_message_vec()
  Ocfs2: Handle empty list in lockres_seq_start() for dlmdebug.c
  Ocfs2: Re-access the journal after ocfs2_insert_extent() in dxdir codes.
  ocfs2: Fix lockdep warning in reflink.
  ocfs2/lockdep: Move ip_xattr_sem out of ocfs2_xattr_get_nolock.

14 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6
Linus Torvalds [Fri, 24 Sep 2010 20:55:29 +0000 (13:55 -0700)]
Merge git://git./linux/kernel/git/gregkh/usb-2.6

* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6:
  USB: update Kconfig help text for CONFIG_USB_SUSPEND
  usb: musb: gadget: restart request on clearing endpoint halt
  usb: musb: host: Issue a memory barrier before starting DMA
  usb: musb: gadget: fix dma length in txstate
  usb: musb: gadget: complete request only if data is transfered over
  usb: musb: gadget: fix DMA length for OUT transfer
  usb: musb: gadget: enable autoclear for OUT transfer in both DMA 0 and DMA 1
  usb: musb: gadget: fix bulk IN infinit hangs in double buffer case
  usb: musb: gadget: fix kernel panic if using out ep with FIFO_TXRX style
  USB: fix bug in initialization of interface minor numbers

14 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging-2.6
Linus Torvalds [Fri, 24 Sep 2010 20:55:12 +0000 (13:55 -0700)]
Merge git://git./linux/kernel/git/gregkh/staging-2.6

* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging-2.6:
  Staging: ti-st: remove st_get_plat_device

14 years agoMerge branch 'drm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied...
Linus Torvalds [Fri, 24 Sep 2010 20:55:01 +0000 (13:55 -0700)]
Merge branch 'drm-fixes' of git://git./linux/kernel/git/airlied/drm-2.6

* 'drm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6:
  vgaarb: trivial fix
  drm: radeon cleanup fixes...
  drm: fix trivial coding errors
  drm: ttm sparse fixes.
  drm/nouveau: fix panels using straps-based mode detection
  drm/ttm: Clear the ghost cpu_writers flag on ttm_buffer_object_transfer.
  drm/radeon: don't allow device to be opened if powered down

14 years agom32r: fix breakage from "m32r: use generic ptrace_resume code"
Al Viro [Fri, 24 Sep 2010 05:25:34 +0000 (06:25 +0100)]
m32r: fix breakage from "m32r: use generic ptrace_resume code"

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
14 years agom32r: hole in shifting pc back
Al Viro [Fri, 24 Sep 2010 05:24:53 +0000 (06:24 +0100)]
m32r: hole in shifting pc back

It's a userland pointer; worse, an untrustable one since ptrace
has just provided a chance to modify it.

X-Roothole-Covering-Cabal: TINRCC
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
14 years agom32r: don't block signals if sigframe setup has failed
Al Viro [Fri, 24 Sep 2010 05:23:57 +0000 (06:23 +0100)]
m32r: don't block signals if sigframe setup has failed

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
14 years agomake m32r handle multiple pending signals
Al Viro [Fri, 24 Sep 2010 05:22:30 +0000 (06:22 +0100)]
make m32r handle multiple pending signals

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
14 years agom32r: fix rt_sigsuspend()
Al Viro [Fri, 24 Sep 2010 05:20:35 +0000 (06:20 +0100)]
m32r: fix rt_sigsuspend()

do_signal() should know about saved_mask for it to work...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
14 years agoUSB: update Kconfig help text for CONFIG_USB_SUSPEND
Alan Stern [Fri, 24 Sep 2010 15:41:46 +0000 (11:41 -0400)]
USB: update Kconfig help text for CONFIG_USB_SUSPEND

This patch (as1429) updates the Kconfig help text for
CONFIG_USB_SUSPEND.  The power/level file is now deprecated; we should
tell people to use power/control instead.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agousb: musb: gadget: restart request on clearing endpoint halt
Sergei Shtylyov [Sat, 11 Sep 2010 18:23:12 +0000 (13:23 -0500)]
usb: musb: gadget: restart request on clearing endpoint halt

Commit 46034dca515bc4ddca0399ae58106d1f5f0d809f (USB: musb_gadget_ep0: stop
abusing musb_gadget_set_halt()) forgot to restart a queued request after
clearing the endpoint halt feature. This results in a couple of USB resets
while enumerating the file-backed storage gadget due to CSW packet not being
sent for the MODE SENSE(10) command.

Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Cc: stable@kernel.org
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agousb: musb: host: Issue a memory barrier before starting DMA
Santosh Shilimkar [Mon, 20 Sep 2010 07:32:07 +0000 (10:32 +0300)]
usb: musb: host: Issue a memory barrier before starting DMA

This patch fixes the issue which was observed while transfering
a large file ( > 20MB) over USB (OMAP MUSB controller acts as USB host)
to an attached USB thumb drive.

It was found that CDB field of CBW packet was set to 0x0. This was
due to missing a barrier before DMA engine starts transfer.
This  buffer is  allocated using dma_alloc_coherent which gives
non-cacheble but bufferable memory and hence needed a write
memory barrier to flush the write buffer.

More info on this thread is here:
http://www.spinics.net/lists/linux-omap/msg33987.html

Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Signed-off-by: Maulik Mankad <x0082077@ti.com>
Cc: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agousb: musb: gadget: fix dma length in txstate
Ming Lei [Mon, 20 Sep 2010 07:32:06 +0000 (10:32 +0300)]
usb: musb: gadget: fix dma length in txstate

DMA length should not go beyond the availabe space
of request buffer, so fix it.

Also set max_len of cppi dma channel as max size of
int type, so make musb dma handling happier.

Signed-off-by: Ming Lei <tom.leiming@gmail.com>
Cc: David Brownell <dbrownell@users.sourceforge.net>
Cc: Anand Gadiyar <gadiyar@ti.com>
Cc: Mike Frysinger <vapier@gentoo.org>
Cc: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agousb: musb: gadget: complete request only if data is transfered over
Ming Lei [Mon, 20 Sep 2010 07:32:05 +0000 (10:32 +0300)]
usb: musb: gadget: complete request only if data is transfered over

Complete the current request only if the data transfer is over.

Signed-off-by: Ming Lei <tom.leiming@gmail.com>
Cc: David Brownell <dbrownell@users.sourceforge.net>
Cc: Anand Gadiyar <gadiyar@ti.com>
Cc: Mike Frysinger <vapier@gentoo.org>
Cc: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agousb: musb: gadget: fix DMA length for OUT transfer
Ming Lei [Mon, 20 Sep 2010 07:32:04 +0000 (10:32 +0300)]
usb: musb: gadget: fix DMA length for OUT transfer

DMA length should not go beyond the availabe space of request buffer,
so fix it.

Signed-off-by: Ming Lei <tom.leiming@gmail.com>
Acked-by: Anand Gadiyar <gadiyar@ti.com>
Cc: David Brownell <dbrownell@users.sourceforge.net>
Cc: Anand Gadiyar <gadiyar@ti.com>
Cc: Mike Frysinger <vapier@gentoo.org>
Cc: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agousb: musb: gadget: enable autoclear for OUT transfer in both DMA 0 and DMA 1
Ming Lei [Mon, 20 Sep 2010 07:32:03 +0000 (10:32 +0300)]
usb: musb: gadget: enable autoclear for OUT transfer in both DMA 0 and DMA 1

This patch fixes one bugs of OUT transfer in double buffer case:

-the current code only enable autoclear for dma mode 1, and not
for dma mode 0

Without this patch, test #5 of usbtest can't be passed if we
configure musb as g_zero and use fifo mode 3 to enable double
buffer mode.

With this patch and the following patch(fix dma length),
on my beagle B5, test#5(queued bulk out) may go beyond
18Mbyte/s(seems dma mode 0 is quicker in double buffer case)
if musb is configured as g_zero and fifo mode 3 is taken, follows
the test command:

    #./testusb -D DEV_NAME -c 1024 -t 5 -s 32768 -g 8   [1]

Also I have tested this patch can't make g_ether broken.

[1],source of testusb : tools/usb/testusb.c under linux kernel;

Signed-off-by: Ming Lei <tom.leiming@gmail.com>
Cc: David Brownell <dbrownell@users.sourceforge.net>
Cc: Anand Gadiyar <gadiyar@ti.com>
Cc: Mike Frysinger <vapier@gentoo.org>
Cc: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agousb: musb: gadget: fix bulk IN infinit hangs in double buffer case
Ming Lei [Mon, 20 Sep 2010 07:32:02 +0000 (10:32 +0300)]
usb: musb: gadget: fix bulk IN infinit hangs in double buffer case

This patch fixes one infinite hang of bulk IN transfer in double buffer
case, the hang can be observed easily by test #6 of usbtest if musb is
configured as g_zero and fifo mode 3 is taken to enable double fifo.

In fact, the patch only removes the check for non-empty fifo before
loading data from new request into fifo since the check is not correct:

-in double buffer case, fifo may accommodate more than one packet,
even though it has contained one packet already and is non-empty

-since last DMA is completed before calling musb_g_tx, it is sure
that fifo may accommodate at least one packet

Without applying the patch, new requst enqueued from .complte may not
have a chance to be loaded into fifo, then will never be completed and
cause infinite hangs.

With the patch, on my beagle B5, test#6(queued bulk in) can be passed and
test result may go beyond 33Mbyte/s if musb is configured as g_zero and
fifo mode 3 is taken, follows the test command:

#testusb -D DEV_NAME -c 1024 -t 6 -s 32768 -g 8   [1]

[1],
    -source of testusb : tools/usb/testusb.c under linux kernel;

Signed-off-by: Ming Lei <tom.leiming@gmail.com>
Acked-by: Anand Gadiyar <gadiyar@ti.com>
Cc: David Brownell <dbrownell@users.sourceforge.net>
Cc: Anand Gadiyar <gadiyar@ti.com>
Cc: Mike Frysinger <vapier@gentoo.org>
Cc: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agousb: musb: gadget: fix kernel panic if using out ep with FIFO_TXRX style
Ming Lei [Mon, 20 Sep 2010 07:32:01 +0000 (10:32 +0300)]
usb: musb: gadget: fix kernel panic if using out ep with FIFO_TXRX style

For shared fifo hw endpoint(with FIFO_TXRX style), only ep_in
field of musb_hw_ep is intialized in musb_g_init_endpoints, and
ep_out is not initialized, but musb_g_rx and rxstate may access
ep_out field of musb_hw_ep by the method below:

musb_ep = &musb->endpoints[epnum].ep_out

which can cause the kernel panic[1] below, this patch fixes the issue
by getting 'musb_ep' from '&musb->endpoints[epnum].ep_in' for shared fifo
endpoint.

[1], kernel panic
[root@OMAP3EVM /]# musb_interrupt 1583: ** IRQ peripheral usb0008 tx0000 rx4000
musb_stage0_irq 460: <== Power=f0, DevCtl=99, int_usb=0x8
musb_g_rx 772: <== (null), rxcsr 4007 ffffffe8
musb_g_rx 786:  iso overrun on ffffffe8
Unable to handle kernel NULL pointer dereference at virtual address 00000008
pgd = c0004000
[00000008] *pgd=00000000
Internal error: Oops: 17 [#1] PREEMPT
last sysfs file: /sys/devices/platform/musb_hdrc/usb1/usb_device/usbdev1.1/dev
Modules linked in: g_zero
CPU: 0    Tainted: G        W    (2.6.35-rc6-gkh-wl+ #92)
PC is at musb_g_rx+0xfc/0x2ec
LR is at vprintk+0x3f4/0x458
pc : [<c02c07a4>]    lr : [<c006ccb0>]    psr: 20000193
sp : c760bd78  ip : c03c9d70  fp : c760bdbc
r10: 00000000  r9 : fa0ab1e0  r8 : 0000000e
r7 : c7e80158  r6 : ffffffe8  r5 : 00000001  r4 : 00004003
r3 : 00010003  r2 : c760bcd8  r1 : c03cd030  r0 : 0000002e
Flags: nzCv  IRQs off  FIQs on  Mode SVC_32  ISA ARM  Segment kernel
Control: 10c5387d  Table: 8778c019  DAC: 00000017
Process kmemleak (pid: 421, stack limit = 0xc760a2e8)
Stack: (0xc760bd78 to 0xc760c000)
bd60:                                                       ffffffe8 c04b1b58
bd80: ffffffe8 c7c01ac0 00000000 c7e80d24 c0084238 00000001 00000001 c7e80158
bda0: 0000000e 00000008 00000099 000000f0 c760be04 c760bdc0 c02bcd68 c02c06b4
bdc0: 00000099 00000008 00004000 c760bdd8 c03cc4f8 00000000 00000002 c7e80158
bde0: c7d2e300 60000193 c760a000 0000005c 00000000 00000000 c760be24 c760be08
be00: c02bcecc c02bc1ac c7d2e300 c7d2e300 0000005c c760a000 c760be54 c760be28
be20: c00ad698 c02bce6c 00000000 c7d2e300 c067c258 0000005c c067c294 00000001
be40: c760a000 00000000 c760be74 c760be58 c00af984 c00ad5fc 0000005c 00000000
be60: 00000000 00000002 c760be8c c760be78 c0039080 c00af8d0 ffffffff fa200000
be80: c760beec c760be90 c0039b6c c003900c 00000001 00000000 c7d1e240 00000000
bea0: 00000000 c068bae8 00000000 60000013 00000001 00000000 00000000 c760beec
bec0: c0064ecc c760bed8 c00ff7d0 c003a0a8 60000013 ffffffff 00000000 c068bae8
bee0: c760bf24 c760bef0 c00ff7d0 c0064ec4 00000001 00000000 c00ff700 00000000
bf00: c0087f00 00000000 60000013 c0d76a70 c0e23795 00000001 c760bf4c c760bf28
bf20: c00ffdd8 c00ff70c c068bb08 c068bae8 60000013 c0100938 c068bb30 00000000
bf40: c760bf84 c760bf50 c010014c c00ffd84 00000001 00000000 c010000c 00012c00
bf60: c7c33f04 00012c00 c7c33f04 00000000 c0100938 00000000 c760bf9c c760bf88
bf80: c01009a8 c0100018 c760bfa8 c7c33f04 c760bff4 c760bfa0 c0088000 c0100944
bfa0: c760bf98 00000000 00000000 00000001 dead4ead ffffffff ffffffff c08ba2bc
bfc0: 00000000 c049e7fa 00000000 c0087f70 c760bfd0 c760bfd0 c7c33f04 c0087f70
bfe0: c006f5e8 00000013 00000000 c760bff8 c006f5e8 c0087f7c 7f0004ff df2000ff
Backtrace:
[<c02c06a8>] (musb_g_rx+0x0/0x2ec) from [<c02bcd68>] (musb_interrupt+0xbc8/0xcc0)
[<c02bc1a0>] (musb_interrupt+0x0/0xcc0) from [<c02bcecc>] (generic_interrupt+0x6c/0x84)
[<c02bce60>] (generic_interrupt+0x0/0x84) from [<c00ad698>] (handle_IRQ_event+0xa8/0x1ec)
 r7:c760a000 r6:0000005c r5:c7d2e300 r4:c7d2e300
[<c00ad5f0>] (handle_IRQ_event+0x0/0x1ec) from [<c00af984>] (handle_level_irq+0xc0/0x13c)
[<c00af8c4>] (handle_level_irq+0x0/0x13c) from [<c0039080>] (asm_do_IRQ+0x80/0xa0)
 r7:00000002 r6:00000000 r5:00000000 r4:0000005c
[<c0039000>] (asm_do_IRQ+0x0/0xa0) from [<c0039b6c>] (__irq_svc+0x4c/0xb4)
Exception stack(0xc760be90 to 0xc760bed8)
be80:                                     00000001 00000000 c7d1e240 00000000
bea0: 00000000 c068bae8 00000000 60000013 00000001 00000000 00000000 c760beec
bec0: c0064ecc c760bed8 c00ff7d0 c003a0a8 60000013 ffffffff
 r5:fa200000 r4:ffffffff
[<c0064eb8>] (sub_preempt_count+0x0/0x100) from [<c00ff7d0>] (find_and_get_object+0xd0/0x110)
 r5:c068bae8 r4:00000000
[<c00ff700>] (find_and_get_object+0x0/0x110) from [<c00ffdd8>] (scan_block+0x60/0x104)
 r8:00000001 r7:c0e23795 r6:c0d76a70 r5:60000013 r4:00000000
[<c00ffd78>] (scan_block+0x0/0x104) from [<c010014c>] (kmemleak_scan+0x140/0x484)
[<c010000c>] (kmemleak_scan+0x0/0x484) from [<c01009a8>] (kmemleak_scan_thread+0x70/0xcc)
 r8:00000000 r7:c0100938 r6:00000000 r5:c7c33f04 r4:00012c00
[<c0100938>] (kmemleak_scan_thread+0x0/0xcc) from [<c0088000>] (kthread+0x90/0x98)
 r5:c7c33f04 r4:c760bfa8
[<c0087f70>] (kthread+0x0/0x98) from [<c006f5e8>] (do_exit+0x0/0x684)
 r7:00000013 r6:c006f5e8 r5:c0087f70 r4:c7c33f04
Code: e3002312 e58d6000 e2833e16 eb0422d5 (e5963020)
---[ end trace f3d5e96f75c297b7 ]---

Signed-off-by: Ming Lei <tom.leiming@gmail.com>
Reviewed-by: Sergei Shtylyov <sshtylyov@mvista.com>
Cc: David Brownell <dbrownell@users.sourceforge.net>
Cc: Anand Gadiyar <gadiyar@ti.com>
Cc: Mike Frysinger <vapier@gentoo.org>
Cc: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Cc: stable <stable@kernel.org>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agoUSB: fix bug in initialization of interface minor numbers
Alan Stern [Tue, 21 Sep 2010 19:01:53 +0000 (15:01 -0400)]
USB: fix bug in initialization of interface minor numbers

Recent changes in the usbhid layer exposed a bug in usbcore.  If
CONFIG_USB_DYNAMIC_MINORS is enabled then an interface may be assigned
a minor number of 0.  However interfaces that aren't registered as USB
class devices also have their minor number set to 0, during
initialization.  As a result usb_find_interface() may return the
wrong interface, leading to a crash.

This patch (as1418) fixes the problem by initializing every
interface's minor number to -1.  It also cleans up the
usb_register_dev() function, which besides being somewhat awkwardly
written, does not unwind completely on all its error paths.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Tested-by: Philip J. Turmel <philip@turmel.org>
Tested-by: Gabriel Craciunescu <nix.or.die@googlemail.com>
Tested-by: Alex Riesen <raa.lkml@gmail.com>
Tested-by: Matthias Bayer <jackdachef@gmail.com>
CC: Jiri Kosina <jkosina@suse.cz>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agoStaging: ti-st: remove st_get_plat_device
Pavan Savoy [Thu, 19 Aug 2010 18:08:51 +0000 (14:08 -0400)]
Staging: ti-st: remove st_get_plat_device

In order to support multiple ST platform devices, a new symbol
'st_get_plat_device' earlier needed to be exported by the arch/XX/brd-XX.c
file which intends to add the ST platform device.

On removing this dependency, now inside ST driver maintain the array of
ST platform devices that would be registered.
As of now let id=0, as and when we end up having such platforms
where mutliple ST devices can exist, id would come from
protocol drivers (BT, FM and GPS) as to on which platform device
they want to register to.

Signed-off-by: Pavan Savoy <pavan_savoy@ti.com>
Acked-by: Randy Dunlap <randy.dunlap@oracle.com>
Cc: Anca Emanuel <anca.emanuel@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agohugetlb, rmap: add BUG_ON(!PageLocked) in hugetlb_add_anon_rmap()
Naoya Horiguchi [Fri, 10 Sep 2010 04:23:06 +0000 (13:23 +0900)]
hugetlb, rmap: add BUG_ON(!PageLocked) in hugetlb_add_anon_rmap()

Confirming page lock is held in hugetlb_add_anon_rmap() may be useful
to detect possible future problems.

Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Acked-by: Rik van Riel <riel@redhat.com>
Acked-by: Andrea Arcangeli <aarcange@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
14 years agohugetlb, rmap: fix confusing page locking in hugetlb_cow()
Naoya Horiguchi [Fri, 10 Sep 2010 04:23:04 +0000 (13:23 +0900)]
hugetlb, rmap: fix confusing page locking in hugetlb_cow()

The "if (!trylock_page)" block in the avoidcopy path of hugetlb_cow()
looks confusing and is buggy.  Originally this trylock_page() was
intended to make sure that old_page is locked even when old_page !=
pagecache_page, because then only pagecache_page is locked.

This patch fixes it by moving page locking into hugetlb_fault().

Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Acked-by: Rik van Riel <riel@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
14 years agohugetlb, rmap: use hugepage_add_new_anon_rmap() in hugetlb_cow()
Naoya Horiguchi [Fri, 10 Sep 2010 04:23:04 +0000 (13:23 +0900)]
hugetlb, rmap: use hugepage_add_new_anon_rmap() in hugetlb_cow()

Obviously, setting anon_vma for COWed hugepage should be done
by hugepage_add_new_anon_rmap() to scan vmas faster.
This patch fixes it.

Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Acked-by: Andrea Arcangeli <aarcange@redhat.com>
Reviewed-by: Rik van Riel <riel@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
14 years agohugetlb, rmap: always use anon_vma root pointer
Naoya Horiguchi [Fri, 10 Sep 2010 04:23:03 +0000 (13:23 +0900)]
hugetlb, rmap: always use anon_vma root pointer

This patch applies Andrea's fix given by the following patch into hugepage
rmapping code:

  commit 288468c334e98aacbb7e2fb8bde6bc1adcd55e05
  Author: Andrea Arcangeli <aarcange@redhat.com>
  Date:   Mon Aug 9 17:19:09 2010 -0700

This patch uses anon_vma->root and avoids unnecessary overwriting when
anon_vma is already set up.

Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Acked-by: Andrea Arcangeli <aarcange@redhat.com>
Reviewed-by: Rik van Riel <riel@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
14 years agovgaarb: trivial fix
Daniel J Blueman [Wed, 22 Sep 2010 17:05:35 +0000 (18:05 +0100)]
vgaarb: trivial fix

Correct function being needlessly visible outside compilation unit
when the only users are internal.

Signed-off-by: Daniel J Blueman <daniel.blueman@gmail.com>
Reviewed-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
14 years agoMerge branch 'kvm-updates/2.6.36' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Linus Torvalds [Fri, 24 Sep 2010 00:13:17 +0000 (17:13 -0700)]
Merge branch 'kvm-updates/2.6.36' of git://git./virt/kvm/kvm

* 'kvm-updates/2.6.36' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
  KVM: Fix reboot on Intel hosts
  KVM: fix irqfd assign/deassign race

14 years agodrm: radeon cleanup fixes...
Daniel J Blueman [Wed, 22 Sep 2010 16:57:19 +0000 (17:57 +0100)]
drm: radeon cleanup fixes...

Fix string interpreted as trigraph and typo.

Signed-off-by: Daniel J Blueman <daniel.blueman@gmail.com>
Reviewed-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
14 years agodrm: fix trivial coding errors
Daniel J Blueman [Fri, 24 Sep 2010 00:10:23 +0000 (10:10 +1000)]
drm: fix trivial coding errors

Correct function storage class, and correct assignment type.

Signed-off-by: Daniel J Blueman <daniel.blueman@gmail.com>
Reviewed-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
14 years agodrm: ttm sparse fixes.
Daniel J Blueman [Wed, 22 Sep 2010 16:45:45 +0000 (17:45 +0100)]
drm: ttm sparse fixes.

Correct allocation flags type and function prototype for ANSI C compliance.

[airlied: whitespace fixed]

Signed-off-by: Daniel J Blueman <daniel.blueman@gmail.com>
Reviewed-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
14 years agodrm/nouveau: fix panels using straps-based mode detection
Ben Skeggs [Thu, 23 Sep 2010 06:44:01 +0000 (16:44 +1000)]
drm/nouveau: fix panels using straps-based mode detection

nouveau_bios_fp_mode() zeroes the mode struct before filling in relevant
entries.  This nukes the mode id initialised by drm_mode_create(), and
causes warnings from idr when we try to remove the mode.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
14 years agoo2dlm: force free mles during dlm exit
Srinivas Eeda [Tue, 21 Sep 2010 23:27:26 +0000 (16:27 -0700)]
o2dlm: force free mles during dlm exit

While umounting, a block mle doesn't get freed if dlm is shutdown after
master request is received but before assert master. This results in unclean
shutdown of dlm domain.

This patch frees all mles that lie around after other nodes were notified about
exiting the dlm and marking dlm state as leaving. Only block mles are expected
to be around, so we log ERROR for other mles but still free them.

Signed-off-by: Srinivas Eeda <srinivas.eeda@oracle.com>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
14 years agoocfs2: Sync inode flags with ext2.
Tao Ma [Sun, 19 Sep 2010 05:42:29 +0000 (13:42 +0800)]
ocfs2: Sync inode flags with ext2.

We sync our inode flags with ext2 and define them by hex
values. But actually in commit 3669567(4 years ago), all
these values are moved to include/linux/fs.h. So we'd
better also use them as what ext2 did. So sync our inode
flags with ext2 by using FS_*.

Signed-off-by: Tao Ma <tao.ma@oracle.com>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
14 years agoocfs2: Move 'wanted' into parens of ocfs2_resmap_resv_bits.
Tao Ma [Sun, 19 Sep 2010 05:42:28 +0000 (13:42 +0800)]
ocfs2: Move 'wanted' into parens of ocfs2_resmap_resv_bits.

The first time I read the function ocfs2_resmap_resv_bits, I consider
about what 'wanted' will be used and consider about the comments.
Then I find it is only used if the reservation is empty. ;)

So we'd better move it to the parens so that it make the code more
readable, what's more, ocfs2_resmap_resv_bits is used so frequently
and we should save some cpus.

Acked-by: Mark Fasheh <mfasheh@suse.com>
Signed-off-by: Tao Ma <tao.ma@oracle.com>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
14 years agoocfs2: Use cpu_to_le16 for e_leaf_clusters in ocfs2_bg_discontig_add_extent.
Tao Ma [Mon, 13 Sep 2010 07:13:50 +0000 (15:13 +0800)]
ocfs2: Use cpu_to_le16 for e_leaf_clusters in ocfs2_bg_discontig_add_extent.

e_leaf_clusters is a le16, so use cpu_to_le16 instead
of cpu_to_le32.

What's more, we change 'clusters' to unsigned int to
signify that the size of 'clusters' isn't important here.

Signed-off-by: Tao Ma <tao.ma@oracle.com>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
14 years agoocfs2: update ctime when changing the file's permission by setfacl
Tao Ma [Mon, 13 Sep 2010 06:00:23 +0000 (14:00 +0800)]
ocfs2: update ctime when changing the file's permission by setfacl

In commit 30e2bab, ext3 fixed it. So change it accordingly in ocfs2.

Steps to reproduce:
# touch aaa
# stat -c %Z aaa
1283760364
# setfacl -m  'u::x,g::x,o::x' aaa
# stat -c %Z aaa
1283760364

Signed-off-by: Tao Ma <tao.ma@oracle.com>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
14 years agoMerge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mjg59/platf...
Linus Torvalds [Thu, 23 Sep 2010 20:30:13 +0000 (13:30 -0700)]
Merge branch 'for_linus' of git://git./linux/kernel/git/mjg59/platform-drivers-x86

* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mjg59/platform-drivers-x86:
  thinkpad-acpi: avoid keymap pitfall
  Change MSI LAPTOP driver maintainer to Lee, Chun-Yi

14 years agothinkpad-acpi: avoid keymap pitfall
Henrique de Moraes Holschuh [Sat, 18 Sep 2010 00:53:41 +0000 (21:53 -0300)]
thinkpad-acpi: avoid keymap pitfall

Change the code so that it will use the correct size for keymap entries.
Do it in a way that makes it harder to screw it up in the future.

Reported-by: Jaime Velasco Juan <jsagarribay@gmail.com>
Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Signed-off-by: Matthew Garrett <mjg@redhat.com>
14 years agoChange MSI LAPTOP driver maintainer to Lee, Chun-Yi
Lee, Chun-Yi [Fri, 10 Sep 2010 08:04:19 +0000 (08:04 +0000)]
Change MSI LAPTOP driver maintainer to Lee, Chun-Yi

Change MSI LAPTOP driver maintainer from Lennart Poettering to Lee, Chun-Yi.

MSI is a Taiwan OEM company, Lee, Chun-Yi can more easy to contact with MSI
and maintain msi-laptop driver.
Thank's for Lennart Poettering's contribute, Lee, Chun-Yi will base on his
article to continue maintain the msi-laptop driver.

Signed-off-by: Lee, Chun-Yi <jlee@novell.com>
Signed-off-by: Matthew Garrett <mjg@redhat.com>
14 years agoMN10300: Arch doesn't support HAVE_ARCH_TRACEHOOK
Mark Salter [Thu, 23 Sep 2010 17:04:33 +0000 (18:04 +0100)]
MN10300: Arch doesn't support HAVE_ARCH_TRACEHOOK

Remove specification of HAVE_ARCH_TRACEHOOK for MN10300 as the arch does not
support it at this time.

Signed-off-by: Mark Salter <msalter@redhat.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
14 years agoMN10300: Fix SIGRTMAX
Mark Salter [Thu, 23 Sep 2010 17:04:28 +0000 (18:04 +0100)]
MN10300: Fix SIGRTMAX

SIGRTMAX should be _NSIG not _NSIG-1.

Signed-off-by: Mark Salter <msalter@redhat.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
14 years agoMN10300: Fix endianess of ext2 bitops
Mark Salter [Thu, 23 Sep 2010 15:40:22 +0000 (16:40 +0100)]
MN10300: Fix endianess of ext2 bitops

The MN10300 arch ext2 bitops assume a big-endian kernel, but the MN10300
arch only runs in little-endian mode.

Reported-by: Akira Takeuchi <takeuchi.akr@jp.panasonic.com>
Signed-off-by: Mark Salter <msalter@redhat.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
14 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu
Linus Torvalds [Thu, 23 Sep 2010 15:06:55 +0000 (08:06 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/tj/percpu

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu:
  percpu: fix pcpu_last_unit_cpu

14 years agoKVM: Fix reboot on Intel hosts
Avi Kivity [Tue, 21 Sep 2010 17:59:43 +0000 (19:59 +0200)]
KVM: Fix reboot on Intel hosts

When we reboot, we disable vmx extensions or otherwise INIT gets blocked.
If a task on another cpu hits a vmx instruction, it will fault if vmx is
disabled.  We trap that to avoid a nasty oops and spin until the reboot
completes.

Problem is, we sleep with interrupts disabled.  This blocks smp_send_stop()
from running, and the reboot process halts.

Fix by enabling interrupts before spinning.

KVM-Stable-Tag.
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
14 years agoKVM: fix irqfd assign/deassign race
Michael S. Tsirkin [Sun, 19 Sep 2010 17:02:31 +0000 (19:02 +0200)]
KVM: fix irqfd assign/deassign race

I think I see the following (theoretical) race:

During irqfd assign, we drop irqfds lock before we
schedule inject work. Therefore, deassign running
on another CPU could cause shutdown and flush to run
before inject, causing user after free in inject.

A simple fix it to schedule inject under the lock.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Gregory Haskins <ghaskins@novell.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
14 years agoipmi: fix hardcoded ipmi device exit path warning
Yinghai Lu [Wed, 22 Sep 2010 20:05:15 +0000 (13:05 -0700)]
ipmi: fix hardcoded ipmi device exit path warning

When modprobe.conf has
options ipmi_si type="kcs" ports=0xCA2 regspacings="4"

ipmi_si can be loaded properly, but when try to unload it get:

Sep 20 15:00:27 xx abrt: Kerneloops: Reported 1 kernel oopses to Abrt
Sep 20 15:00:27 xx abrtd: Directory 'kerneloops-1285020027-1' creation detected
Sep 20 15:00:27 xx abrtd: New crash /var/spool/abrt/kerneloops-1285020027-1, processing
Sep 20 15:01:09 xx kernel: ------------[ cut here ]------------
Sep 20 15:01:09 xx kernel: WARNING: at drivers/base/driver.c:262 driver_unregister+0x8a/0xa0()
Sep 20 15:01:09 xx kernel: Hardware name: Sun Fire x4800
Sep 20 15:01:09 xx kernel: Unexpected driver unregister!
Sep 20 15:01:09 xx kernel: Modules linked in: ipmi_si(-) ipmi_msghandler ip6table_filter ip6_tables ebtable_nat ebtables ipt_MASQUERADE iptable_nat nf_nat bridge stp llc autofs4 sunrpc cpufreq_ondemand acpi_cpufreq freq_table mperf xt_physdev be2iscsi iscsi_boot_sysfs bnx2i cnic uio cxgb3i iw_cxgb3 cxgb3 mdio ib_iser rdma_cm ib_cm iw_cm ib_sa ib_mad ib_core ib_addr ipv6 iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi dm_mirror dm_region_hash dm_log dm_mod vhost_net macvtap macvlan tun kvm_intel kvm uinput sg ses enclosure ahci libahci pcspkr i2c_i801 i2c_core iTCO_wdt iTCO_vendor_support igb dca i7core_edac edac_core ext3 jbd mbcache sd_mod crc_t10dif megaraid_sas [last unloaded: ipmi_devintf]
Sep 20 15:01:09 xx kernel: Pid: 10625, comm: modprobe Tainted: G        W   2.6.36-rc5-tip+ #6
Sep 20 15:01:09 xx kernel: Call Trace:
Sep 20 15:01:09 xx kernel: [<ffffffff810600df>] warn_slowpath_common+0x7f/0xc0
Sep 20 15:01:09 xx kernel: [<ffffffff810601d6>] warn_slowpath_fmt+0x46/0x50
Sep 20 15:01:09 xx kernel: [<ffffffff812ff60a>] driver_unregister+0x8a/0xa0
Sep 20 15:01:09 xx kernel: [<ffffffff812ae112>] pnp_unregister_driver+0x12/0x20
Sep 20 15:01:09 xx kernel: [<ffffffffa01d0327>] cleanup_ipmi_si+0x3c/0xa7 [ipmi_si]
Sep 20 15:01:09 xx kernel: [<ffffffff81099a60>] sys_delete_module+0x1a0/0x270
Sep 20 15:01:09 xx kernel: [<ffffffff814b7070>] ? do_page_fault+0x150/0x320
Sep 20 15:01:09 xx kernel: [<ffffffff8100b072>] system_call_fastpath+0x16/0x1b
Sep 20 15:01:09 xx kernel: ---[ end trace 0d1967161adcee0d ]---

We need to check if ipmi_pnp_driver is loaded before we try to unload it.

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Cc: Corey Minyard <minyard@acm.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
14 years agortc: s3c: balance state changes of wakeup flag
Vladimir Zapolskiy [Wed, 22 Sep 2010 20:05:13 +0000 (13:05 -0700)]
rtc: s3c: balance state changes of wakeup flag

This change resolves a problem about unbalanced calls of
enable_irq_wakeup() and disable_irq_wakeup() for alarm interrupt.

Bug reproduction:

root@eb600:~# echo 0 > /sys/class/rtc/rtc0/wakealarm

WARNING: at kernel/irq/manage.c:361 set_irq_wake+0x7c/0xe4()
 Unbalanced IRQ 46 wake disable
Modules linked in:
[<c0025708>] (unwind_backtrace+0x0/0xd8) from [<c003358c>] (warn_slowpath_common+0x44/0x5c)
[<c003358c>] (warn_slowpath_common+0x44/0x5c) from [<c00335dc>] (warn_slowpath_fmt+0x24/0x30)
[<c00335dc>] (warn_slowpath_fmt+0x24/0x30) from [<c0058c20>] (set_irq_wake+0x7c/0xe4)
[<c0058c20>] (set_irq_wake+0x7c/0xe4) from [<c01b5e80>] (s3c_rtc_setalarm+0xa8/0xb8)
[<c01b5e80>] (s3c_rtc_setalarm+0xa8/0xb8) from [<c01b47a0>] (rtc_set_alarm+0x60/0x74)
[<c01b47a0>] (rtc_set_alarm+0x60/0x74) from [<c01b5a98>] (rtc_sysfs_set_wakealarm+0xc8/0xd8)
[<c01b5a98>] (rtc_sysfs_set_wakealarm+0xc8/0xd8) from [<c01891ec>] (dev_attr_store+0x20/0x24)
[<c01891ec>] (dev_attr_store+0x20/0x24) from [<c00be934>] (sysfs_write_file+0x104/0x13c)
[<c00be934>] (sysfs_write_file+0x104/0x13c) from [<c0080e7c>] (vfs_write+0xb0/0x158)
[<c0080e7c>] (vfs_write+0xb0/0x158) from [<c0080fcc>] (sys_write+0x3c/0x68)
[<c0080fcc>] (sys_write+0x3c/0x68) from [<c0020ec0>] (ret_fast_syscall+0x0/0x28)

Signed-off-by: Vladimir Zapolskiy <vzapolskiy@gmail.com>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: Ben Dooks <ben@fluff.org.uk>
Cc: Atul Dahiya <atul.dahiya@samsung.com>
Cc: Taekgyun Ko <taeggyun.ko@samsung.com>
Cc: Kukjin Kim <kgene.kim@samsung.com>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
14 years agommap: call unlink_anon_vmas() in __split_vma() in case of error
Andrea Arcangeli [Wed, 22 Sep 2010 20:05:12 +0000 (13:05 -0700)]
mmap: call unlink_anon_vmas() in __split_vma() in case of error

If __split_vma fails because of an out of memory condition the
anon_vma_chain isn't teardown and freed potentially leading to rmap walks
accessing freed vma information plus there's a memleak.

Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Acked-by: Johannes Weiner <jweiner@redhat.com>
Acked-by: Rik van Riel <riel@redhat.com>
Acked-by: Hugh Dickins <hughd@google.com>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
14 years agormap: fix walk during fork
Andrea Arcangeli [Wed, 22 Sep 2010 20:05:12 +0000 (13:05 -0700)]
rmap: fix walk during fork

The below bug in fork led to the rmap walk finding the parent huge-pmd
twice instead of just once, because the anon_vma_chain objects of the
child vma still point to the vma->vm_mm of the parent.

The patch fixes it by making the rmap walk accurate during fork.  It's not
a big deal normally but it worth being accurate considering the cost is
the same.

Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Acked-by: Johannes Weiner <jweiner@redhat.com>
Acked-by: Rik van Riel <riel@redhat.com>
Acked-by: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
14 years agodrivers/pci/intel-iommu.c: fix build with older gcc's
Andrew Morton [Wed, 22 Sep 2010 20:05:11 +0000 (13:05 -0700)]
drivers/pci/intel-iommu.c: fix build with older gcc's

drivers/pci/intel-iommu.c: In function `__iommu_calculate_agaw':
drivers/pci/intel-iommu.c:437: sorry, unimplemented: inlining failed in call to 'width_to_agaw': function body not available
drivers/pci/intel-iommu.c:445: sorry, unimplemented: called from here

Move the offending function (and its siblings) to top-of-file, remove the
forward declaration.

Addresses https://bugzilla.kernel.org/show_bug.cgi?id=17441

Reported-by: Martin Mokrejs <mmokrejs@ribosome.natur.cuni.cz>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Jesse Barnes <jbarnes@virtuousgeek.org>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
14 years agooom: filter unkillable tasks from tasklist dump
David Rientjes [Wed, 22 Sep 2010 20:05:10 +0000 (13:05 -0700)]
oom: filter unkillable tasks from tasklist dump

/proc/sys/vm/oom_dump_tasks is enabled by default, so it's necessary to
limit as much information as possible that it should emit.

The tasklist dump should be filtered to only those tasks that are eligible
for oom kill.  This is already done for memcg ooms, but this patch extends
it to both cpuset and mempolicy ooms as well as init.

In addition to suppressing irrelevant information, this also reduces
confusion since users currently don't know which tasks in the tasklist
aren't eligible for kill (such as those attached to cpusets or bound to
mempolicies with a disjoint set of mems or nodes, respectively) since that
information is not shown.

Signed-off-by: David Rientjes <rientjes@google.com>
Reviewed-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
14 years agodrivers/video/sis/sis_main.c: prevent reading uninitialized stack memory
Dan Rosenberg [Wed, 22 Sep 2010 20:05:09 +0000 (13:05 -0700)]
drivers/video/sis/sis_main.c: prevent reading uninitialized stack memory

The FBIOGET_VBLANK device ioctl allows unprivileged users to read 16 bytes
of uninitialized stack memory, because the "reserved" member of the
fb_vblank struct declared on the stack is not altered or zeroed before
being copied back to the user.  This patch takes care of it.

Signed-off-by: Dan Rosenberg <dan.j.rosenberg@gmail.com>
Cc: Thomas Winischhofer <thomas@winischhofer.net>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
14 years agouml: fix compile warning
Richard Weinberger [Wed, 22 Sep 2010 20:05:07 +0000 (13:05 -0700)]
uml: fix compile warning

This fixes:
incompatible pointer type:  => 89
       arch/um/kernel/exec.c: warning: passing argument 2 of 'execve1' from
incompatible pointer type:  => 69, 85
       arch/um/kernel/exec.c: warning: passing argument 3 of 'execve1' from
incompatible pointer type:  => 69, 85

which was introduced by d7627467b7a8d ("Make do_execve() take a const
filename pointer")

Signed-off-by: Richard Weinberger <richard@nod.at>
Cc: David Howells <dhowells@redhat.com>
Cc: Jeff Dike <jdike@addtoit.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
14 years ago/proc/pid/smaps: fix dirty pages accounting
KOSAKI Motohiro [Wed, 22 Sep 2010 20:05:06 +0000 (13:05 -0700)]
/proc/pid/smaps: fix dirty pages accounting

Currently, /proc/<pid>/smaps has wrong dirty pages accounting.
Shared_Dirty and Private_Dirty output only pte dirty pages and ignore
PG_dirty page flag.  It is difference against documentation, but also
inconsistent against Referenced field.  (Referenced checks both pte and
page flags)

This patch fixes it.

Test program:

 large-array.c
 ---------------------------------------------------
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>

 char array[1*1024*1024*1024L];

 int main(void)
 {
         memset(array, 1, sizeof(array));
         pause();

         return 0;
 }
 ---------------------------------------------------

Test case:
 1. run ./large-array
 2. cat /proc/`pidof large-array`/smaps
 3. swapoff -a
 4. cat /proc/`pidof large-array`/smaps again

Test result:
 <before patch>

00601000-40601000 rw-p 00000000 00:00 0
Size:            1048576 kB
Rss:             1048576 kB
Pss:             1048576 kB
Shared_Clean:          0 kB
Shared_Dirty:          0 kB
Private_Clean:    218992 kB   <-- showed pages as clean incorrectly
Private_Dirty:    829584 kB
Referenced:       388364 kB
Swap:                  0 kB
KernelPageSize:        4 kB
MMUPageSize:           4 kB

 <after patch>

00601000-40601000 rw-p 00000000 00:00 0
Size:            1048576 kB
Rss:             1048576 kB
Pss:             1048576 kB
Shared_Clean:          0 kB
Shared_Dirty:          0 kB
Private_Clean:         0 kB
Private_Dirty:   1048576 kB  <-- fixed
Referenced:       388480 kB
Swap:                  0 kB
KernelPageSize:        4 kB
MMUPageSize:           4 kB

Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Acked-by: Hugh Dickins <hughd@google.com>
Cc: Matt Mackall <mpm@selenic.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
14 years agofbcon: fix lockdep warning from fbcon_deinit()
Jarek Poplawski [Wed, 22 Sep 2010 20:05:05 +0000 (13:05 -0700)]
fbcon: fix lockdep warning from fbcon_deinit()

Fix the lockdep warning:

[   13.657164] INFO: trying to register non-static key.
[   13.657169] the code is fine but needs lockdep annotation.
[   13.657171] turning off the locking correctness validator.
[   13.657177] Pid: 622, comm: modprobe Not tainted 2.6.36-rc3c #8
[   13.657180] Call Trace:
[   13.657194]  [<c13002c8>] ? printk+0x18/0x20
[   13.657202]  [<c1056cf6>] register_lock_class+0x336/0x350
[   13.657208]  [<c1058bf9>] __lock_acquire+0x449/0x1180
[   13.657215]  [<c1059997>] lock_acquire+0x67/0x80
[   13.657222]  [<c1042bf1>] ? __cancel_work_timer+0x51/0x230
[   13.657227]  [<c1042c23>] __cancel_work_timer+0x83/0x230
[   13.657231]  [<c1042bf1>] ? __cancel_work_timer+0x51/0x230
[   13.657236]  [<c10582b2>] ? mark_held_locks+0x62/0x80
[   13.657243]  [<c10b3a2f>] ? kfree+0x7f/0xe0
[   13.657248]  [<c105853c>] ? trace_hardirqs_on_caller+0x11c/0x160
[   13.657253]  [<c105858b>] ? trace_hardirqs_on+0xb/0x10
[   13.657259]  [<c117f4cd>] ? fbcon_deinit+0x16d/0x1e0
[   13.657263]  [<c117f4cd>] ? fbcon_deinit+0x16d/0x1e0
[   13.657268]  [<c1042dea>] cancel_work_sync+0xa/0x10
[   13.657272]  [<c117f444>] fbcon_deinit+0xe4/0x1e0
...

The warning is caused by trying to cancel an uninitialized work from
fbcon_exit().  Fix it by adding a check for queue.func, similarly to other
places in this code.

Signed-off-by: Jarek Poplawski <jarkao2@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
14 years agoefifb: support the EFI framebuffer on more Apple hardware
Luke Macken [Wed, 22 Sep 2010 20:05:04 +0000 (13:05 -0700)]
efifb: support the EFI framebuffer on more Apple hardware

Enable the EFI framebuffer on 14 more Macs, including the iMac11,1
iMac10,1 iMac8,1 Macmini3,1 Macmini4,1 MacBook5,1 MacBook6,1 MacBook7,1
MacBookPro2,2 MacBookPro5,2 MacBookPro5,3 MacBookPro6,1 MacBookPro6,2 and
MacBookPro7,1

Information gathered from various user submissions.

    https://bugzilla.redhat.com/show_bug.cgi?id=528232
    http://ubuntuforums.org/showthread.php?t=1557326

[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Luke Macken <lmacken@redhat.com>
Signed-off-by: Peter Jones <pjones@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
14 years agoefifb: check that the base address is plausible on pci systems
Peter Jones [Wed, 22 Sep 2010 20:05:04 +0000 (13:05 -0700)]
efifb: check that the base address is plausible on pci systems

Some Apple machines have identical DMI data but different memory
configurations for the video.  Given that, check that the address in our
table is actually within the range of a PCI BAR on a VGA device in the
machine.

This also fixes up the return value from set_system(), which has always
been wrong, but never resulted in bad behavior since there's only ever
been one matching entry in the dmi table.

The patch

1) stops people's machines from crashing when we get their display wrong,
   which seems to be unfortunately inevitable,

2) allows us to support identical dmi data with differing video memory
   configurations

This also adds me as the efifb maintainer, since I've effectively been
acting as such for quite some time.

Signed-off-by: Peter Jones <pjones@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
14 years agoaio: do not return ERESTARTSYS as a result of AIO
Jan Kara [Wed, 22 Sep 2010 20:05:03 +0000 (13:05 -0700)]
aio: do not return ERESTARTSYS as a result of AIO

OCFS2 can return ERESTARTSYS from its write function when the process is
signalled while waiting for a cluster lock (and the filesystem is mounted
with intr mount option).  Generally, it seems reasonable to allow
filesystems to return this error code from its IO functions.  As we must
not leak ERESTARTSYS (and similar error codes) to userspace as a result of
an AIO operation, we have to properly convert it to EINTR inside AIO code
(restarting the syscall isn't really an option because other AIO could
have been already submitted by the same io_submit syscall).

Signed-off-by: Jan Kara <jack@suse.cz>
Reviewed-by: Jeff Moyer <jmoyer@redhat.com>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Zach Brown <zach.brown@oracle.com>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
14 years agovmscan: check all_unreclaimable in direct reclaim path
Minchan Kim [Wed, 22 Sep 2010 20:05:01 +0000 (13:05 -0700)]
vmscan: check all_unreclaimable in direct reclaim path

M.  Vefa Bicakci reported 2.6.35 kernel hang up when hibernation on his
32bit 3GB mem machine.
(https://bugzilla.kernel.org/show_bug.cgi?id=16771). Also he bisected
the regression to

  commit bb21c7ce18eff8e6e7877ca1d06c6db719376e3c
  Author: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
  Date:   Fri Jun 4 14:15:05 2010 -0700

     vmscan: fix do_try_to_free_pages() return value when priority==0 reclaim failure

At first impression, this seemed very strange because the above commit
only chenged function return value and hibernate_preallocate_memory()
ignore return value of shrink_all_memory().  But it's related.

Now, page allocation from hibernation code may enter infinite loop if the
system has highmem.  The reasons are that vmscan don't care enough OOM
case when oom_killer_disabled.

The problem sequence is following as.

1. hibernation
2. oom_disable
3. alloc_pages
4. do_try_to_free_pages
       if (scanning_global_lru(sc) && !all_unreclaimable)
               return 1;

If kswapd is not freozen, it would set zone->all_unreclaimable to 1 and
then shrink_zones maybe return true(ie, all_unreclaimable is true).  So at
last, alloc_pages could go to _nopage_.  If it is, it should have no
problem.

This patch adds all_unreclaimable check to protect in direct reclaim path,
too.  It can care of hibernation OOM case and help bailout
all_unreclaimable case slightly.

Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Signed-off-by: Minchan Kim <minchan.kim@gmail.com>
Reported-by: M. Vefa Bicakci <bicave@superonline.com>
Reported-by: <caiqian@redhat.com>
Reviewed-by: Johannes Weiner <hannes@cmpxchg.org>
Tested-by: <caiqian@redhat.com>
Acked-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Rik van Riel <riel@redhat.com>
Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Balbir Singh <balbir@in.ibm.com>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
14 years agodrivers/rtc/rtc-ab3100.c: add missing platform_set_drvdata() in ab3100_rtc_probe()
Axel Lin [Wed, 22 Sep 2010 20:04:59 +0000 (13:04 -0700)]
drivers/rtc/rtc-ab3100.c: add missing platform_set_drvdata() in ab3100_rtc_probe()

Otherwise, calling platform_get_drvdata() in ab3100_rtc_remove() returns
NULL.

Signed-off-by: Axel Lin <axel.lin@gmail.com>
Acked-by:Wan ZongShun <mcuos.com@gmail.com>
Acked-by: Linus Walleij <linus.walleij@stericsson.com>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
14 years agoMAINTAINERS: change AVR32 and AT32AP maintainer
Hans-Christian Egtvedt [Wed, 22 Sep 2010 20:04:58 +0000 (13:04 -0700)]
MAINTAINERS: change AVR32 and AT32AP maintainer

Alter the maintainer of the AVR32 architecture and the AVR32/AT32AP
machine support to me.  Haavard is moving on to new challenges, and we've
found it better to transfer the maintainer part to me.  I will have good
contact with Haavard anyway.

Signed-off-by: Hans-Christian Egtvedt <hans-christian.egtvedt@atmel.com>
Acked-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
14 years agovmware balloon: rename module
Dmitry Torokhov [Wed, 22 Sep 2010 20:04:57 +0000 (13:04 -0700)]
vmware balloon: rename module

In an effort to minimize customer confusion we want to unify naming
convention for VMware-provided kernel modules.  This change renames the
balloon driver from vmware_ballon to vmw_balloon.

We expect to follow this naming convention (vmw_<module_name>) for all
modules that are part of mainline kernel and/or being distributed by
VMware, with the sole exception of vmxnet3 driver (since the name of
mainline driver happens to match with the name used in VMware Tools).

Signed-off-by: Dmitry Torokhov <dtor@vmware.com>
Acked-by: Bhavesh Davda <bhavesh@vmware.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
14 years agoarm: fix "arm: fix pci_set_consistent_dma_mask for dmabounce devices"
FUJITA Tomonori [Wed, 22 Sep 2010 20:04:55 +0000 (13:04 -0700)]
arm: fix "arm: fix pci_set_consistent_dma_mask for dmabounce devices"

This fixes the regression caused by the commit 6fee48cd330c68
("dma-mapping: arm: use generic pci_set_dma_mask and
pci_set_consistent_dma_mask").

ARM needs to clip the dma coherent mask for dmabounce devices. This
restores the old trick.

Note that strictly speaking, the DMA API doesn't allow architectures to do
such but I'm not sure it's worth adding the new API to set the dma mask
that allows architectures to clip it.

Reported-by: Krzysztof Halasa <khc@pm.waw.pl>
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Acked-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
14 years ago/proc/vmcore: fix seeking
Arnd Bergmann [Wed, 22 Sep 2010 20:04:54 +0000 (13:04 -0700)]
/proc/vmcore: fix seeking

Commit 73296bc611 ("procfs: Use generic_file_llseek in /proc/vmcore")
broke seeking on /proc/vmcore.  This changes it back to use default_llseek
in order to restore the original behaviour.

The problem with generic_file_llseek is that it only allows seeks up to
inode->i_sb->s_maxbytes, which is zero on procfs and some other virtual
file systems.  We should merge generic_file_llseek and default_llseek some
day and clean this up in a proper way, but for 2.6.35/36, reverting vmcore
is the safer solution.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Reported-by: CAI Qian <caiqian@redhat.com>
Tested-by: CAI Qian <caiqian@redhat.com>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
14 years agoipmi: fix acpi probe print
Yinghai Lu [Wed, 22 Sep 2010 20:04:53 +0000 (13:04 -0700)]
ipmi: fix acpi probe print

After d9e1b6c45059ccf ("ipmi: fix ACPI detection with regspacing") we get

[   11.026326] ipmi_si: probing via ACPI
[   11.030019] ipmi_si 00:09: (null) regsize 1 spacing 1 irq 0
[   11.035594] ipmi_si: Adding ACPI-specified kcs state machine

on an old system with only one range for ipmi kcs range.

Try to fix it by adding another res pointer.

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
14 years agooom: always return a badness score of non-zero for eligible tasks
David Rientjes [Wed, 22 Sep 2010 20:04:52 +0000 (13:04 -0700)]
oom: always return a badness score of non-zero for eligible tasks

A task's badness score is roughly a proportion of its rss and swap
compared to the system's capacity.  The scale ranges from 0 to 1000 with
the highest score chosen for kill.  Thus, this scale operates on a
resolution of 0.1% of RAM + swap.  Admin tasks are also given a 3% bonus,
so the badness score of an admin task using 3% of memory, for example,
would still be 0.

It's possible that an exceptionally large number of tasks will combine to
exhaust all resources but never have a single task that uses more than
0.1% of RAM and swap (or 3.0% for admin tasks).

This patch ensures that the badness score of any eligible task is never 0
so the machine doesn't unnecessarily panic because it cannot find a task
to kill.

Signed-off-by: David Rientjes <rientjes@google.com>
Cc: Dave Hansen <dave@linux.vnet.ibm.com>
Cc: Nitin Gupta <ngupta@vflare.org>
Cc: Pekka Enberg <penberg@cs.helsinki.fi>
Cc: Minchan Kim <minchan.kim@gmail.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
14 years agoPrevent freeing uninitialized pointer in compat_do_readv_writev
Dan Rosenberg [Wed, 22 Sep 2010 18:32:56 +0000 (14:32 -0400)]
Prevent freeing uninitialized pointer in compat_do_readv_writev

In 32-bit compatibility mode, the error handling for
compat_do_readv_writev() may free an uninitialized pointer, potentially
leading to all sorts of ugly memory corruption.  This is reliably
triggerable by unprivileged users by invoking the readv()/writev()
syscalls with an invalid iovec pointer.  The below patch fixes this to
emulate the non-compat version.

Introduced by commit b83733639a49 ("compat: factor out
compat_rw_copy_check_uvector from compat_do_readv_writev")

Signed-off-by: Dan Rosenberg <dan.j.rosenberg@gmail.com>
Cc: stable@kernel.org (2.6.35)
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
14 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6
Linus Torvalds [Wed, 22 Sep 2010 19:09:46 +0000 (12:09 -0700)]
Merge git://git./linux/kernel/git/davem/sparc-2.6

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6:
  sparc: Prevent no-handler signal syscall restart recursion.
  sparc: Don't mask signal when we can't setup signal frame.
  sparc64: Fix race in signal instruction flushing.
  sparc64: Support RAW perf events.

14 years agopowerpc: fix double syscall restarts
Al Viro [Mon, 20 Sep 2010 20:48:57 +0000 (21:48 +0100)]
powerpc: fix double syscall restarts

Make sigreturn zero regs->trap, make do_signal() do the same on all
paths.  As it is, signal interrupting e.g. read() from fd 512 (==
ERESTARTSYS) with another signal getting unblocked when the first
handler finishes will lead to restart one insn earlier than it ought
to.  Same for multiple signals with in-kernel handlers interrupting
that sucker at the same time.  Same for multiple signals of any kind
interrupting that sucker on 64bit...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Acked-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
14 years agoMerge branch 'for-linus' of git://git.kernel.dk/linux-2.6-block
Linus Torvalds [Wed, 22 Sep 2010 16:12:37 +0000 (09:12 -0700)]
Merge branch 'for-linus' of git://git.kernel.dk/linux-2.6-block

* 'for-linus' of git://git.kernel.dk/linux-2.6-block:
  bdi: Fix warnings in __mark_inode_dirty for /dev/zero and friends
  char: Mark /dev/zero and /dev/kmem as not capable of writeback
  bdi: Initialize noop_backing_dev_info properly
  cfq-iosched: fix a kernel OOPs when usb key is inserted
  block: fix blk_rq_map_kern bio direction flag
  cciss: freeing uninitialized data on error path

14 years agobdi: Fix warnings in __mark_inode_dirty for /dev/zero and friends
Jan Kara [Tue, 21 Sep 2010 09:51:01 +0000 (11:51 +0200)]
bdi: Fix warnings in __mark_inode_dirty for /dev/zero and friends

Inodes of devices such as /dev/zero can get dirty for example via
utime(2) syscall or due to atime update. Backing device of such inodes
(zero_bdi, etc.) is however unable to handle dirty inodes and thus
__mark_inode_dirty complains.  In fact, inode should be rather dirtied
against backing device of the filesystem holding it. This is generally a
good rule except for filesystems such as 'bdev' or 'mtd_inodefs'. Inodes
in these pseudofilesystems are referenced from ordinary filesystem
inodes and carry mapping with real data of the device. Thus for these
inodes we have to use inode->i_mapping->backing_dev_info as we did so
far. We distinguish these filesystems by checking whether sb->s_bdi
points to a non-trivial backing device or not.

Example: Assume we have an ext3 filesystem on /dev/sda1 mounted on /.
There's a device inode A described by a path "/dev/sdb" on this
filesystem. This inode will be dirtied against backing device "8:0"
after this patch. bdev filesystem contains block device inode B coupled
with our inode A. When someone modifies a page of /dev/sdb, it's B that
gets dirtied and the dirtying happens against the backing device "8:16".
Thus both inodes get filed to a correct bdi list.

Cc: stable@kernel.org
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
14 years agochar: Mark /dev/zero and /dev/kmem as not capable of writeback
Jan Kara [Tue, 21 Sep 2010 09:49:01 +0000 (11:49 +0200)]
char: Mark /dev/zero and /dev/kmem as not capable of writeback

These devices don't do any writeback but their device inodes still can get
dirty so mark bdi appropriately so that bdi code does the right thing and files
inodes to lists of bdi carrying the device inodes.

Cc: stable@kernel.org
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
14 years agobdi: Initialize noop_backing_dev_info properly
Jan Kara [Tue, 21 Sep 2010 09:48:55 +0000 (11:48 +0200)]
bdi: Initialize noop_backing_dev_info properly

Properly initialize this backing dev info so that writeback code does not
barf when getting to it e.g. via sb->s_bdi.

Cc: stable@kernel.org
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
14 years agosparc: Prevent no-handler signal syscall restart recursion.
David S. Miller [Wed, 22 Sep 2010 05:30:13 +0000 (22:30 -0700)]
sparc: Prevent no-handler signal syscall restart recursion.

Explicitly clear the "in-syscall" bit when we have no signal
handler and back up the program counters to back up the system
call.

Reported-by: Al Viro <viro@ZenIV.linux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
14 years agosparc: Don't mask signal when we can't setup signal frame.
David S. Miller [Wed, 22 Sep 2010 04:41:12 +0000 (21:41 -0700)]
sparc: Don't mask signal when we can't setup signal frame.

Don't invoke the signal handler tracehook in that situation
either.

Reported-by: Al Viro <viro@ZenIV.linux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
14 years agodrm/ttm: Clear the ghost cpu_writers flag on ttm_buffer_object_transfer.
Francisco Jerez [Tue, 21 Sep 2010 00:15:15 +0000 (02:15 +0200)]
drm/ttm: Clear the ghost cpu_writers flag on ttm_buffer_object_transfer.

It makes sense for a BO to move after a process has requested
exclusive RW access on it (e.g. because the BO used to be located in
unmappable VRAM and we intercepted the CPU access from the fault
handler).

If we let the ghost object inherit cpu_writers from the original
object, ttm_bo_release_list() will raise a kernel BUG when the ghost
object is destroyed. This can be reproduced with the nouveau driver on
nv5x.

Reported-by: Marcin Slusarz <marcin.slusarz@gmail.com>
Reviewed-by: Jerome Glisse <jglisse@redhat.com>
Tested-by: Marcin Slusarz <marcin.slusarz@gmail.com>
Signed-off-by: Francisco Jerez <currojerez@riseup.net>
Signed-off-by: Dave Airlie <airlied@redhat.com>
14 years agodrm/radeon: don't allow device to be opened if powered down
Dave Airlie [Wed, 22 Sep 2010 02:31:46 +0000 (12:31 +1000)]
drm/radeon: don't allow device to be opened if powered down

If the switcheroo has switched the device off, don't let X open it.

Signed-off-by: Dave Airlie <airlied@redhat.com>
14 years agoMerge branch 'for-linus/i2c/2636-rc5' of git://git.fluff.org/bjdooks/linux
Linus Torvalds [Wed, 22 Sep 2010 01:21:05 +0000 (18:21 -0700)]
Merge branch 'for-linus/i2c/2636-rc5' of git://git.fluff.org/bjdooks/linux

* 'for-linus/i2c/2636-rc5' of git://git.fluff.org/bjdooks/linux:
  i2c-omap: Make sure i2c bus is free before setting it to idle

14 years agofs: {lock,unlock}_flocks() stubs to prepare for BKL removal
Sage Weil [Tue, 21 Sep 2010 21:35:37 +0000 (14:35 -0700)]
fs: {lock,unlock}_flocks() stubs to prepare for BKL removal

The lock structs are currently protected by the BKL, but are accessed by
code in fs/locks.c and misc file system and DLM code.  These stubs will
allow all users to switch to the new interface before the implementation
is changed to a spinlock.

Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Sage Weil <sage@newdream.net>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
14 years agoi2c-omap: Make sure i2c bus is free before setting it to idle
Mathias Nyman [Thu, 26 Aug 2010 07:36:44 +0000 (07:36 +0000)]
i2c-omap: Make sure i2c bus is free before setting it to idle

If the i2c bus receives an interrupt with both BB (bus busy) and
ARDY (register access ready) statuses set during the tranfer of the last message
the bus was put to idle while still busy.

This caused bus to timeout.

Signed-off-by: Mathias Nyman <mathias.nyman@nokia.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
14 years agoMerge branch 'sched-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Tue, 21 Sep 2010 20:22:10 +0000 (13:22 -0700)]
Merge branch 'sched-fixes-for-linus' of git://git./linux/kernel/git/tip/linux-2.6-tip

* 'sched-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  sched: Fix nohz balance kick
  sched: Fix user time incorrectly accounted as system time on 32-bit

14 years agoMerge branch 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Tue, 21 Sep 2010 20:21:42 +0000 (13:21 -0700)]
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:
  hw breakpoints: Fix pid namespace bug
  x86: Fix instruction breakpoint encoding
  oprofile: Add Support for Intel CPU Family 6 / Model 22 (Intel Celeron 540)
  kprobes: Fix Kconfig dependency

14 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph...
Linus Torvalds [Tue, 21 Sep 2010 18:20:10 +0000 (11:20 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/sage/ceph-client

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client:
  ceph: select CRYPTO
  ceph: check mapping to determine if FILE_CACHE cap is used
  ceph: only send one flushsnap per cap_snap per mds session
  ceph: fix cap_snap and realm split
  ceph: stop sending FLUSHSNAPs when we hit a dirty capsnap
  ceph: correctly set 'follows' in flushsnap messages
  ceph: fix dn offset during readdir_prepopulate
  ceph: fix file offset wrapping at 4GB on 32-bit archs
  ceph: fix reconnect encoding for old servers
  ceph: fix pagelist kunmap tail
  ceph: fix null pointer deref on anon root dentry release

14 years agoMerge branch 'drm-intel-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/ickle...
Linus Torvalds [Tue, 21 Sep 2010 18:00:30 +0000 (11:00 -0700)]
Merge branch 'drm-intel-fixes' of git://git./linux/kernel/git/ickle/drm-intel

* 'drm-intel-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/ickle/drm-intel:
  drm/i915: Hold a reference to the object whilst unbinding the eviction list
  drm/i915,agp/intel: Add second set of PCI-IDs for B43
  drm/i915: Fix Sandybridge fence registers
  drm/i915/crt: Downgrade warnings for hotplug failures
  drm/i915: Ensure that the crtcinfo is populated during mode_fixup()

14 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus
Linus Torvalds [Tue, 21 Sep 2010 18:00:09 +0000 (11:00 -0700)]
Merge git://git./linux/kernel/git/rusty/linux-2.6-for-linus

* git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus:
  lguest: update comments to reflect LHCALL_LOAD_GDT_ENTRY.
  virtio: console: Prevent userspace from submitting NULL buffers
  virtio: console: Fix poll blocking even though there is data to read

14 years agosched: Fix nohz balance kick
Suresh Siddha [Mon, 13 Sep 2010 18:02:21 +0000 (11:02 -0700)]
sched: Fix nohz balance kick

There's a situation where the nohz balancer will try to wake itself:

cpu-x is idle which is also ilb_cpu
got a scheduler tick during idle
and the nohz_kick_needed() in trigger_load_balance() checks for
rq_x->nr_running which might not be zero (because of someone waking a
task on this rq etc) and this leads to the situation of the cpu-x
sending a kick to itself.

And this can cause a lockup.

Avoid this by not marking ourself eligible for kicking.

Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <1284400941.2684.19.camel@sbsiddha-MOBL3.sc.intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
14 years agocfq-iosched: fix a kernel OOPs when usb key is inserted
Vivek Goyal [Tue, 14 Sep 2010 06:47:11 +0000 (08:47 +0200)]
cfq-iosched: fix a kernel OOPs when usb key is inserted

Mike reported a kernel crash when a usb key hotplug is performed while all
kernel thrads are not in a root cgroup and are running in one of the child
cgroups of blkio controller.

BUG: unable to handle kernel NULL pointer dereference at 0000002c
IP: [<c11c7b08>] cfq_get_queue+0x232/0x412
*pde = 00000000
Oops: 0000 [#1] PREEMPT
last sysfs file: /sys/devices/pci0000:00/0000:00:1d.7/usb2/2-1/2-1:1.0/host3/scsi_host/host3/uevent

[..]
Pid: 30039, comm: scsi_scan_3 Not tainted 2.6.35.2-fg.roam #1 Volvi2                         /Aspire 4315
EIP: 0060:[<c11c7b08>] EFLAGS: 00010086 CPU: 0
EIP is at cfq_get_queue+0x232/0x412
EAX: f705f9c0 EBX: e977abac ECX: 00000000 EDX: 00000000
ESI: f00da400 EDI: f00da4ec EBP: e977a800 ESP: dff8fd00
 DS: 007b ES: 007b FS: 0000 GS: 0000 SS: 0068
Process scsi_scan_3 (pid: 30039, ti=dff8e000 task=f6b6c9a0 task.ti=dff8e000)
Stack:
 00000000 00000000 00000001 01ff0000 f00da508 00000000 f00da524 f00da540
<0> e7994940 dd631750 f705f9c0 e977a820 e977ac44 f00da4d0 00000001 f6b6c9a0
<0> 00000010 00008010 0000000b 00000000 00000001 e977a800 dd76fac0 00000246
Call Trace:
 [<c11c7f10>] ? cfq_set_request+0x228/0x34c
 [<c11c7ce8>] ? cfq_set_request+0x0/0x34c
 [<c11bb3b9>] ? elv_set_request+0xf/0x1c
 [<c11bdd51>] ? get_request+0x1ad/0x22f
 [<c11bddf2>] ? get_request_wait+0x1f/0x11a
 [<c11d013b>] ? kvasprintf+0x33/0x3b
 [<c127b537>] ? scsi_execute+0x1d/0x103
 [<c127b675>] ? scsi_execute_req+0x58/0x83
 [<c127c391>] ? scsi_probe_and_add_lun+0x188/0x7c2
 [<c12718c6>] ? attribute_container_add_device+0x15/0xfa
 [<c11c95d1>] ? kobject_get+0xf/0x13
 [<c126d1db>] ? get_device+0x10/0x14
 [<c127be93>] ? scsi_alloc_target+0x217/0x24d
 [<c127cbd8>] ? __scsi_scan_target+0x95/0x480
 [<c10204eb>] ? dequeue_entity+0x14/0x1fe
 [<c1020491>] ? update_curr+0x165/0x1ab
 [<c1020491>] ? update_curr+0x165/0x1ab
 [<c127d00d>] ? scsi_scan_channel+0x4a/0x76
 [<c127d0b0>] ? scsi_scan_host_selected+0x77/0xad
 [<c127d13c>] ? do_scan_async+0x0/0x11a
 [<c127d137>] ? do_scsi_scan_host+0x51/0x56
 [<c127d13c>] ? do_scan_async+0x0/0x11a
 [<c127d14a>] ? do_scan_async+0xe/0x11a
 [<c127d13c>] ? do_scan_async+0x0/0x11a
 [<c10354c5>] ? kthread+0x5e/0x63
 [<c1035467>] ? kthread+0x0/0x63
 [<c1002af6>] ? kernel_thread_helper+0x6/0x10
Code: 44 24 1c 54 83 44 24 18 54 83 fa 03 75 94 8b 06 c7 86 64 02 00 00 01 00 00 00 83 e0 03 09 f0 89 06 8b 44 24 28 8b 90 58 01 00 00 <8b> 42 2c 85 c0 75 03 8b 42 08 8d 54 24 48 52 8d 4c 24 50 51 68
EIP: [<c11c7b08>] cfq_get_queue+0x232/0x412 SS:ESP 0068:dff8fd00
CR2: 000000000000002c
---[ end trace 9a88306573f69b12 ]---

The problem here is that we don't have bdi->dev information available when
thread does some IO.  Hence when dev_name() tries to access bdi->dev, it
crashes.

This problem does not happen if kernel threads are in root group as root
group is statically allocated at device initialization time and we don't
hit this piece of code.

Fix it by delaying the filling of major and minor number information of
device in blk_group.  Initially a blk_group is created with 0 as device
information and this information is filled later once some more IO comes
in from same group.

Reported-by: Mike Kazantsev <mk.fraggod@gmail.com>
Signed-off-by: Vivek Goyal <vgoyal@redhat.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
14 years agoblock: fix blk_rq_map_kern bio direction flag
Benny Halevy [Mon, 13 Sep 2010 19:32:19 +0000 (21:32 +0200)]
block: fix blk_rq_map_kern bio direction flag

This bug was introduced in 7b6d91daee5cac6402186ff224c3af39d79f4a0e
"block: unify flags for struct bio and struct request"

Cc: Boaz Harrosh <bharrosh@panasas.com>
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
14 years agocciss: freeing uninitialized data on error path
Dan Carpenter [Mon, 13 Sep 2010 12:09:33 +0000 (14:09 +0200)]
cciss: freeing uninitialized data on error path

The "h->scatter_list" is allocated inside a for loop.  If any of those
allocations fail, then the rest of the list is uninitialized data.  When
we free it we should start from the top and free backwards so that we
don't call kfree() on uninitialized pointers.

Also if the allocation for "h->scatter_list" fails then we would get an
Oops here.  I should have noticed this when I send: 4ee69851c "cciss:
handle allocation failure."  but I didn't.  Sorry about that.

Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
14 years agoMerge remote branch 'linus' into drm-intel-fixes
Chris Wilson [Tue, 21 Sep 2010 08:14:55 +0000 (09:14 +0100)]
Merge remote branch 'linus' into drm-intel-fixes

14 years agosparc64: Fix race in signal instruction flushing.
David S. Miller [Tue, 21 Sep 2010 06:24:52 +0000 (23:24 -0700)]
sparc64: Fix race in signal instruction flushing.

If another cpu does a very wide munmap() on the signal frame area,
it can tear down the page table hierarchy from underneath us.

Borrow an idea from the 64-bit fault path's get_user_insn(), and
disable cross call interrupts during the page table traversal
to lock them in place while we operate.

Reported-by: Al Viro <viro@ZenIV.linux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
14 years agopercpu: fix pcpu_last_unit_cpu
Tejun Heo [Tue, 21 Sep 2010 05:57:19 +0000 (07:57 +0200)]
percpu: fix pcpu_last_unit_cpu

pcpu_first/last_unit_cpu are used to track which cpu has the first and
last units assigned.  This in turn is used to determine the span of a
chunk for man/unmap cache flushes and whether an address belongs to
the first chunk or not in per_cpu_ptr_to_phys().

When the number of possible CPUs isn't power of two, a chunk may
contain unassigned units towards the end of a chunk.  The logic to
determine pcpu_last_unit_cpu was incorrect when there was an unused
unit at the end of a chunk.  It failed to ignore the unused unit and
assigned the unused marker NR_CPUS to pcpu_last_unit_cpu.

This was discovered through kdump failure which was caused by
malfunctioning per_cpu_ptr_to_phys() on a kvm setup with 50 possible
CPUs by CAI Qian.

Signed-off-by: Tejun Heo <tj@kernel.org>
Reported-by: CAI Qian <caiqian@redhat.com>
Cc: stable@kernel.org
14 years agolguest: update comments to reflect LHCALL_LOAD_GDT_ENTRY.
Rusty Russell [Tue, 21 Sep 2010 16:54:01 +0000 (10:54 -0600)]
lguest: update comments to reflect LHCALL_LOAD_GDT_ENTRY.

We used to have a hypercall which reloaded the entire GDT, then we
switched to one which loaded a single entry (to match the IDT code).

Some comments were not updated, so fix them.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Reported by: Eviatar Khen <eviatarkhen@gmail.com>

14 years agovirtio: console: Prevent userspace from submitting NULL buffers
Amit Shah [Tue, 14 Sep 2010 07:56:16 +0000 (13:26 +0530)]
virtio: console: Prevent userspace from submitting NULL buffers

A userspace could submit a buffer with 0 length to be written to the
host.  Prevent such a situation.

This was not needed previously, but recent changes in the way write()
works exposed this condition to trigger a virtqueue event to the host,
causing a NULL buffer to be sent across.

Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
CC: stable@kernel.org
14 years agovirtio: console: Fix poll blocking even though there is data to read
Hans de Goede [Thu, 16 Sep 2010 09:13:08 +0000 (14:43 +0530)]
virtio: console: Fix poll blocking even though there is data to read

I found this while working on a Linux agent for spice, the symptom I was
seeing was select blocking on the spice vdagent virtio serial port even
though there were messages queued up there.

virtio_console's port_fops_poll checks port->inbuf != NULL to determine
if read won't block. However if an application reads enough bytes from
inbuf through port_fops_read, to empty the current port->inbuf,
port->inbuf will be NULL even though there may be buffers left in the
virtqueue.

This causes poll() to block even though there is data to be read,
this patch fixes this by using will_read_block(port) instead of the
port->inbuf != NULL check.

Signed-off-By: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Cc: stable@kernel.org
14 years agoLinux 2.6.36-rc5
Linus Torvalds [Mon, 20 Sep 2010 23:56:53 +0000 (16:56 -0700)]
Linux 2.6.36-rc5

14 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging-2.6
Linus Torvalds [Mon, 20 Sep 2010 23:45:08 +0000 (16:45 -0700)]
Merge git://git./linux/kernel/git/gregkh/staging-2.6

* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging-2.6:
  Staging: vt6655: fix buffer overflow
  Revert: "Staging: batman-adv: Adding netfilter-bridge hooks"

14 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6
Linus Torvalds [Mon, 20 Sep 2010 23:44:40 +0000 (16:44 -0700)]
Merge git://git./linux/kernel/git/gregkh/usb-2.6

* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6:
  USB: musb: MAINTAINERS: Fix my mail address
  USB: serial/mos*: prevent reading uninitialized stack memory
  USB: otg: twl4030: fix phy initialization(v1)
  USB: EHCI: Disable langwell/penwell LPM capability
  usb: musb_debugfs: don't use the struct file private_data field with seq_files

14 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty-2.6
Linus Torvalds [Mon, 20 Sep 2010 23:44:24 +0000 (16:44 -0700)]
Merge git://git./linux/kernel/git/gregkh/tty-2.6

* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty-2.6:
  serial: mfd: fix bug in serial_hsu_remove()
  serial: amba-pl010: fix set_ldisc

14 years agoStaging: vt6655: fix buffer overflow
Dan Carpenter [Mon, 6 Sep 2010 12:32:30 +0000 (14:32 +0200)]
Staging: vt6655: fix buffer overflow

"param->u.wpa_associate.wpa_ie_len" comes from the user.  We should
check it so that the copy_from_user() doesn't overflow the buffer.

Also further down in the function, we assume that if
"param->u.wpa_associate.wpa_ie_len" is set then "abyWPAIE[0]" is
initialized.  To make that work, I changed the test here to say that if
"wpa_ie_len" is set then "wpa_ie" has to be a valid pointer or we return
-EINVAL.

Oddly, we only use the first element of the abyWPAIE[] array.  So I
suspect there may be some other issues in this function.

Signed-off-by: Dan Carpenter <error27@gmail.com>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>