Commit Graph

234195 Commits

Author SHA1 Message Date
Chris Mason 31339acd07 Btrfs: deal with short returns from copy_from_user
When copy_from_user is only able to copy some of the bytes we requested,
we may end up creating a partially up to date page.  To avoid garbage in
the page, we need to treat a partial copy as a zero length copy.

This makes the rest of the file_write code drop the page and
retry the whole copy instead of marking the partially up to
date page as dirty.

Signed-off-by: Chris Mason <chris.mason@oracle.com>
cc: stable@kernel.org
2011-03-07 11:10:24 -05:00
Chris Mason b1bf862e9d Btrfs: fix regressions in copy_from_user handling
Commit 914ee295af fixed deadlocks in
btrfs_file_write where we would catch page faults on pages we had
locked.

But, there were a few problems:

1) The x86-32 iov_iter_copy_from_user_atomic code always fails to copy
data when the amount to copy is more than 4K and the offset to start
copying from is not page aligned.  The result was btrfs_file_write
looping forever retrying the iov_iter_copy_from_user_atomic

We deal with this by changing btrfs_file_write to drop down to single
page copies when iov_iter_copy_from_user_atomic starts returning failure.

2) The btrfs_file_write code was leaking delalloc reservations when
iov_iter_copy_from_user_atomic returned zero.  The looping above would
result in the entire filesystem running out of delalloc reservations and
constantly trying to flush things to disk.

3) btrfs_file_write will lock down page cache pages, make sure
any writeback is finished, do the copy_from_user and then release them.
Before the loop runs we check the first and last pages in the write to
see if they are only being partially modified.  If the start or end of
the write isn't aligned, we make sure the corresponding pages are
up to date so that we don't introduce garbage into the file.

With the copy_from_user changes, we're allowing the VM to reclaim the
pages after a partial update from copy_from_user, but we're not
making sure the page cache page is up to date when we loop around to
resume the write.

We deal with this by pushing the up to date checks down into the page
prep code.  This fits better with how the rest of file_write works.

Signed-off-by: Chris Mason <chris.mason@oracle.com>
Reported-by: Mitch Harder <mitch.harder@sabayonlinux.org>
cc: stable@kernel.org
2011-03-07 10:42:27 -05:00
Chris Wilson 467cffba85 drm/i915: Rebind the buffer if its alignment constraints changes with tiling
Early gen3 and gen2 chipset do not have the relaxed per-surface tiling
constraints of the later chipsets, so we need to check that the GTT
alignment is correct for the new tiling. If it is not, we need to
rebind.

Reported-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
2011-03-07 11:02:16 +00:00
Chris Wilson a1656b9090 drm/i915: Disable GPU semaphores by default
Andi Kleen narrowed his GPU hangs on his Sugar Bay (SNB desktop) rev 09
down to the use of GPU semaphores, and we already know that they appear
broken up to Huron River (mobile) rev 08. (I'm optimistic that disabling
GPU semaphores is simply hiding another bug by the latency and
side-effects of the additional device interaction it introduces...)

However, use of semaphores is a massive performance improvement... Only
as long as the system remains stable. Enable at your peril.

Reported-by: Andi Kleen <andi-fd@firstfloor.org>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=33921
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
2011-03-07 11:00:59 +00:00
Rajendra Nayak 120bdaa47c i2c-omap: Program I2C_WE on OMAP4 to enable i2c wakeup
For the I2C module to be wakeup capable, programming I2C_WE register (which
was skipped for OMAP4430) is needed even on OMAP4.

This fixes i2c controller timeouts which were seen recently with the static
dependency being cleared between MPU and L4PER clockdomains.

Signed-off-by: Rajendra Nayak <rnayak@ti.com>
[ben-linux@fluff.org: re-flowed description]
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2011-03-07 09:53:38 +00:00
Dmitry Kravkov 9b3de1ef1b bnx2x: fix MaxBW configuration
Increase resolution of MaxBW algorithm to suit
Min Bandwidth configuration.

Signed-off-by: Dmitry Kravkov <dmitry@broadcom.com>
Signed-off-by: Eilon Greenstein <eilong@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2011-03-06 18:06:04 -08:00
Dmitry Kravkov e3835b9933 bnx2x: (NPAR) prevent HW access in D3 state
Changing speed setting in NPAR requires HW access, this patch
delays the access to D0 state when performed in D3.

Signed-off-by: Dmitry Kravkov <dmitry@broadcom.com>
Signed-off-by: Eilon Greenstein <eilong@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2011-03-06 18:06:03 -08:00
Dmitry Kravkov 9fdc3e9566 bnx2x: fix link notification
Report link to OS and other PFs after HW is fully reconfigured
according to new link parameters. (Affected only Multi Function modes).

Signed-off-by: Dmitry Kravkov <dmitry@broadcom.com>
Signed-off-by: Eilon Greenstein <eilong@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2011-03-06 18:06:03 -08:00
Dmitry Kravkov c4154f25c8 bnx2x: fix non-pmf device load flow
Remove port MAX BW configuration from non-pmf functions,
which caused reconfigure of HW according to 10G (fake) link.

Signed-off-by: Dmitry Kravkov <dmitry@broadcom.com>
Signed-off-by: Eilon Greenstein <eilong@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2011-03-06 18:06:02 -08:00
Linus Torvalds 6277d53a9f Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6:
  ALSA: hda - Don't set to D3 in Cirrus errata init verbs
  ALSA: hda - add new Fermi 5xx codec IDs to snd-hda
  ASoC: WM8994: Ensure late enable events are processed for the ADCs
  ASoC: WM8994: Don't disable the AIF[1|2]CLK_ENA unconditionaly
  ASoC: Fix WM9081 platform data initialisation
  ALSA: hda - Fix unable to record issue on ASUS N82JV
  ALSA: HDA: Realtek: Fixup jack detection to input subsystem
2011-03-06 10:44:49 -08:00
Amit Shah d7a62cd033 virtio: console: Don't access vqs if device was unplugged
If a virtio-console device gets unplugged while a port is open, a
subsequent close() call on the port accesses vqs to free up buffers.
This can lead to a crash.

The buffers are already freed up as a result of the call to
unplug_ports() from virtcons_remove().  The fix is to simply not access
vq information if port->portdev is NULL.

Reported-by: juzhang <juzhang@redhat.com>
CC: stable@kernel.org
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-03-06 10:44:13 -08:00
Takashi Iwai 2133991d58 Merge branch 'fix/asoc' into for-linus 2011-03-06 12:37:42 +01:00
Chris Wilson 9135583464 drm/i915: Do not overflow the MMADDR write FIFO
Whilst the GT is powered down (rc6), writes to MMADDR are placed in a
FIFO by the System Agent. This is a limited resource, only 64 entries, of
which 20 are reserved for Display and PCH writes, and so we must take
care not to queue up too many writes. To avoid this, there is counter
which we can poll to ensure there are sufficient free entries in the
fifo.

"Issuing a write to a full FIFO is not supported; at worst it could
result in corruption or a system hang."

Reported-and-Tested-by: Matt Turner <mattst88@gmail.com>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=34056
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
2011-03-06 09:07:46 +00:00
Chris Wilson 0ee537abbd Revert "drm/i915: fix corruptions on i8xx due to relaxed fencing"
This reverts commit c2e0eb1670.

As it turns out, userspace already depends upon being able to enable
tiling on existing bo which it promises to be large enough for its
purposes i.e. it will not access beyond the end of the last full-tile
row.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=35016
Reported-and-tested-by: Kamal Mostafa <kamal@canonical.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
2011-03-06 09:07:45 +00:00
Linus Torvalds fb62c00a6d Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client:
  ceph: no .snap inside of snapped namespace
  libceph: fix msgr standby handling
  libceph: fix msgr keepalive flag
  libceph: fix msgr backoff
  libceph: retry after authorization failure
  libceph: fix handling of short returns from get_user_pages
  ceph: do not clear I_COMPLETE from d_release
  ceph: do not set I_COMPLETE
  Revert "ceph: keep reference to parent inode on ceph_dentry"
2011-03-05 10:43:22 -08:00
Andi Kleen 5c4b4be3b6 mm: use correct numa policy node for transparent hugepages
Pass down the correct node for a transparent hugepage allocation.  Most
callers continue to use the current node, however the hugepaged daemon
now uses the previous node of the first to be collapsed page instead.
This ensures that khugepaged does not mess up local memory for an
existing process which uses local policy.

The choice of node is somewhat primitive currently: it just uses the
node of the first page in the pmd range.  An alternative would be to
look at multiple pages and use the most popular node.  I used the
simplest variant for now which should work well enough for the case of
all pages being on the same node.

[akpm@linux-foundation.org: coding-style fixes]
Acked-by: Andrea Arcangeli <aarcange@redhat.com>
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Reviewed-by: 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>
2011-03-04 17:53:39 -08:00
Andi Kleen 19ee151e14 mm: preserve original node for transparent huge page copies
This makes a difference for LOCAL policy, where the node cannot be
determined from the policy itself, but has to be gotten from the original
page.

Acked-by: Andrea Arcangeli <aarcange@redhat.com>
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Reviewed-by: 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>
2011-03-04 17:53:39 -08:00
Andi Kleen 236344d6b4 mm: add alloc_page_vma_node()
Add a alloc_page_vma_node that allows passing the "local" node in.  Used
in a followon patch.

Acked-by: Andrea Arcangeli <aarcange@redhat.com>
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Reviewed-by: 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>
2011-03-04 17:53:39 -08:00
Andi Kleen 2f5f9486f8 mm: change alloc_pages_vma to pass down the policy node for local policy
Currently alloc_pages_vma() always uses the local node as policy node for
the LOCAL policy.  Pass this node down as an argument instead.

No behaviour change from this patch, but will be needed for followons.

Acked-by: Andrea Arcangeli <aarcange@redhat.com>
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Reviewed-by: 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>
2011-03-04 17:53:39 -08:00
Alexandre Bounine b8bc1dd397 RapidIO: Update MAINTAINERS
Signed-off-by: Alexandre Bounine <alexandre.bounine@idt.com>
Cc: Matt Porter <mporter@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-03-04 17:53:38 -08:00
Axel Lin 9dab51daef drivers/video/backlight/ltv350qv.c: fix a memory leak
Signed-off-by: Axel Lin <axel.lin@gmail.com>
Cc: Haavard Skinnemoen <hskinnemoen@atmel.com>
Cc: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-03-04 17:53:38 -08:00
Kyungmin Park 10ffa96407 MAINTAINERS: add maintainer of Samsung Mobile Machine support
Add maintainer of Samsung Mobile machine support.  Currently, Aquila,
Goni, Universal (C210), and Nuri board are supported.

Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Cc: Joe Perches <joe@perches.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Russell King <rmk@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-03-04 17:53:38 -08:00
Thomas Gleixner 95b90afec3 pps: make pps_gen_parport depend on BROKEN
This driver causes hard lockups, when the active clock soure is jiffies.

The reason is that it loops with interrupts disabled waiting for a
timestamp to be reached by polling getnstimeofday().  Though with a
jiffies clocksource, when that code runs on the same CPU which is
responsible for updating jiffies, then we loop in circles for ever
simply because the timer interrupt cannot update jiffies.  So both UP
and SMP can be affected.

There is no easy fix for that problem so make it depend on BROKEN for
now.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Alexander Gordeev <lasaine@lvk.cs.msu.su>
Cc: Rodolfo Giometti <giometti@linux.it>
Cc: john stultz <johnstul@us.ibm.com>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-03-04 17:53:38 -08:00
Axel Lin 97e419a082 drivers/misc/bmp085.c: add MODULE_DEVICE_TABLE
The device table is required to load modules based on modaliases.

Signed-off-by: Axel Lin <axel.lin@gmail.com>
Cc: Shubhrajyoti D <shubhrajyoti@ti.com>
Cc: Christoph Mair <christoph.mair@gmail.com>
Cc: Jonathan Cameron <jic23@cam.ac.uk>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-03-04 17:53:38 -08:00
Li Zefan b75f38d659 cpuset: add a missing unlock in cpuset_write_resmask()
Don't forget to release cgroup_mutex if alloc_trial_cpuset() fails.

[akpm@linux-foundation.org: avoid multiple return points]
Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Cc: Paul Menage <menage@google.com>
Acked-by: David Rientjes <rientjes@google.com>
Cc: Miao Xie <miaox@cn.fujitsu.com>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-03-04 17:53:38 -08:00
Axel Lin 2ec38a0359 drivers/rtc/rtc-s3c.c: fix prototype for s3c_rtc_setaie()
Fix s3c_rtc_setaie() prototype to eliminate the following compile
warning:

  drivers/rtc/rtc-s3c.c:383: warning: initialization from incompatible pointer type

(akpm: the rtc_class_ops.alarm_irq_enable() handler is being passed two
arguments where it expects just one, presumably with undesired effects)

Signed-off-by: Axel Lin <axel.lin@gmail.com>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-03-04 17:53:38 -08:00
Linus Torvalds 212e3499b2 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/vapier/blackfin
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/vapier/blackfin:
  Blackfin: iflush: update anomaly 05000491 workaround
  Blackfin: outs[lwb]: make sure count is greater than 0
2011-03-04 17:31:43 -08:00
Linus Torvalds 971a967bce Merge branch 'rmobile-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6
* 'rmobile-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6:
  ARM: mach-shmobile: mackerel: modify LCDC clock divider value
  ARM: mach-shmobile: ap4evb: modify LCDC clock divider value
  ARM: mach-shmobile: mackerel: fixup memory initialize for zboot
  ARM: mach-shmobile: ap4evb: fixup memory initialize for zboot
  ARM: mach-shmobile: Add sh73a0 MIPI-CSI and CEU clocks
  ARM: mach-shmobile: AG5EVM MIPI-DSI LCD reset delay fix
2011-03-04 17:31:19 -08:00
Linus Torvalds f0678f3237 Merge branch 'sh-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6
* 'sh-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6:
  sh: Change __nosave_XXX symbols to long
  sh: Flush executable pages in copy_user_highpage
  sh: Ensure ST40-300 BogoMIPS value is consistent
  sh: sh7750: Fix incompatible pointer type
  sh: sh7750: move machtypes.h to include/generated
2011-03-04 17:31:01 -08:00
Linus Torvalds be91bfebf2 Merge branch 'drm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6
* 'drm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6:
  drm/nouveau: allocate kernel's notifier object at end of block
2011-03-04 17:30:32 -08:00
Neil Horman e9e3d724e2 nfs4: Ensure that ACL pages sent over NFS were not allocated from the slab (v3)
The "bad_page()" page allocator sanity check was reported recently (call
chain as follows):

  bad_page+0x69/0x91
  free_hot_cold_page+0x81/0x144
  skb_release_data+0x5f/0x98
  __kfree_skb+0x11/0x1a
  tcp_ack+0x6a3/0x1868
  tcp_rcv_established+0x7a6/0x8b9
  tcp_v4_do_rcv+0x2a/0x2fa
  tcp_v4_rcv+0x9a2/0x9f6
  do_timer+0x2df/0x52c
  ip_local_deliver+0x19d/0x263
  ip_rcv+0x539/0x57c
  netif_receive_skb+0x470/0x49f
  :virtio_net:virtnet_poll+0x46b/0x5c5
  net_rx_action+0xac/0x1b3
  __do_softirq+0x89/0x133
  call_softirq+0x1c/0x28
  do_softirq+0x2c/0x7d
  do_IRQ+0xec/0xf5
  default_idle+0x0/0x50
  ret_from_intr+0x0/0xa
  default_idle+0x29/0x50
  cpu_idle+0x95/0xb8
  start_kernel+0x220/0x225
  _sinittext+0x22f/0x236

It occurs because an skb with a fraglist was freed from the tcp
retransmit queue when it was acked, but a page on that fraglist had
PG_Slab set (indicating it was allocated from the Slab allocator (which
means the free path above can't safely free it via put_page.

We tracked this back to an nfsv4 setacl operation, in which the nfs code
attempted to fill convert the passed in buffer to an array of pages in
__nfs4_proc_set_acl, which gets used by the skb->frags list in
xs_sendpages.  __nfs4_proc_set_acl just converts each page in the buffer
to a page struct via virt_to_page, but the vfs allocates the buffer via
kmalloc, meaning the PG_slab bit is set.  We can't create a buffer with
kmalloc and free it later in the tcp ack path with put_page, so we need
to either:

1) ensure that when we create the list of pages, no page struct has
   PG_Slab set

 or

2) not use a page list to send this data

Given that these buffers can be multiple pages and arbitrarily sized, I
think (1) is the right way to go.  I've written the below patch to
allocate a page from the buddy allocator directly and copy the data over
to it.  This ensures that we have a put_page free-able page for every
entry that winds up on an skb frag list, so it can be safely freed when
the frame is acked.  We do a put page on each entry after the
rpc_call_sync call so as to drop our own reference count to the page,
leaving only the ref count taken by tcp_sendpages.  This way the data
will be properly freed when the ack comes in

Successfully tested by myself to solve the above oops.

Note, as this is the result of a setacl operation that exceeded a page
of data, I think this amounts to a local DOS triggerable by an
uprivlidged user, so I'm CCing security on this as well.

Signed-off-by: Neil Horman <nhorman@tuxdriver.com>
CC: Trond Myklebust <Trond.Myklebust@netapp.com>
CC: security@kernel.org
CC: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-03-04 17:28:52 -08:00
Sage Weil 455cec0abf ceph: no .snap inside of snapped namespace
Otherwise you can do things like

# mkdir .snap/foo
# cd .snap/foo/.snap
# ls
<badness>

Signed-off-by: Sage Weil <sage@newdream.net>
2011-03-04 12:25:09 -08:00
Sage Weil e00de341fd libceph: fix msgr standby handling
The standby logic used to be pretty dependent on the work requeueing
behavior that changed when we switched to WQ_NON_REENTRANT.  It was also
very fragile.

Restructure things so that:
 - We clear WRITE_PENDING when we set STANDBY.  This ensures we will
   requeue work when we wake up later.
 - con_work backs off if STANDBY is set.  There is nothing to do if we are
   in standby.
 - clear_standby() helper is called by both con_send() and con_keepalive(),
   the two actions that can wake us up again.  Move the connect_seq++
   logic here.

Signed-off-by: Sage Weil <sage@newdream.net>
2011-03-04 12:25:05 -08:00
Sage Weil e76661d0a5 libceph: fix msgr keepalive flag
There was some broken keepalive code using a dead variable.  Shift to using
the proper bit flag.

Signed-off-by: Sage Weil <sage@newdream.net>
2011-03-04 12:24:31 -08:00
Sage Weil 60bf8bf881 libceph: fix msgr backoff
With commit f363e45f we replaced a bunch of hacky workqueue mutual
exclusion logic with the WQ_NON_REENTRANT flag.  One pieces of fallout is
that the exponential backoff breaks in certain cases:

 * con_work attempts to connect.
 * we get an immediate failure, and the socket state change handler queues
   immediate work.
 * con_work calls con_fault, we decide to back off, but can't queue delayed
   work.

In this case, we add a BACKOFF bit to make con_work reschedule delayed work
next time it runs (which should be immediately).

Signed-off-by: Sage Weil <sage@newdream.net>
2011-03-04 12:24:28 -08:00
Dave Kleikamp 3256f80fbb MAINTAINERS: Update shaggy's email address
Signed-off-by: Dave Kleikamp <shaggy@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-03-04 10:44:06 -08:00
Al Viro 1858efd471 minimal fix for do_filp_open() race
failure exits on the no-O_CREAT side of do_filp_open() merge with
those of O_CREAT one; unfortunately, if do_path_lookup() returns
-ESTALE, we'll get out_filp:, notice that we are about to return
-ESTALE without having trying to create the sucker with LOOKUP_REVAL
and jump right into the O_CREAT side of code.  And proceed to try
and create a file.  Usually that'll fail with -ESTALE again, but
we can race and get that attempt of pathname resolution to succeed.

open() without O_CREAT really shouldn't end up creating files, races
or not.  The real fix is to rearchitect the whole do_filp_open(),
but for now splitting the failure exits will do.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-03-04 13:14:21 -05:00
Linus Torvalds e3e89cc535 Mark ptrace_{traceme,attach,detach} static
They are only used inside kernel/ptrace.c, and have been for a long
time.  We don't want to go back to the bad-old-days when architectures
did things on their own, so make them static and private.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-03-04 09:23:30 -08:00
Yinghai Lu 3b28cf32cc x86, numa: Fix numa_emulation code with memory-less node0
This crash happens on a system that does not have RAM on node0.

When numa_emulation is compiled in, and:

 1. we boot the system without numa=fake...
 2. or we boot the system with numa=fake=128 to make emulation fail

we will get:

[    0.076025] ------------[ cut here ]------------
[    0.080004] kernel BUG at arch/x86/mm/numa_64.c:788!
[    0.080004] invalid opcode: 0000 [#1] SMP
[...]

need to use early_cpu_to_node() directly, because cpu_to_apicid
and apicid_to_node will return node0 that is not onlined.

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Acked-by: Tejun Heo <tj@kernel.org>
Cc: David Rientjes <rientjes@google.com>
LKML-Reference: <4D6ECF72.5010308@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-03-04 15:20:19 +01:00
Balbir Singh 0c3b916801 sched: Fix sched rt group scheduling when hierachy is enabled
The current sched rt code is broken when it comes to hierarchical
scheduling, this patch fixes two problems

1. It adds redundant enqueuing (harmless) when it finds a queue
   has tasks enqueued, but it has no run time and it is not
   throttled.

2. The most important change is in sched_rt_rq_enqueue/dequeue.
   The code just picks the rt_rq belonging to the current cpu
   on which the period timer runs, the patch fixes it, so that
   the correct rt_se is enqueued/dequeued.

Tested with a simple hierarchy

/c/d, c and d assigned similar runtimes of 50,000 and a while
1 loop runs within "d". Both c and d get throttled, without
the patch, the task just stops running and never runs (depends
on where the sched_rt b/w timer runs). With the patch, the
task is throttled and runs as expected.

[ bharata, suggestions on how to pick the rt_se belong to the
  rt_rq and correct cpu ]

Signed-off-by: Balbir Singh <balbir@linux.vnet.ibm.com>
Acked-by: Bharata B Rao <bharata@linux.vnet.ibm.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: stable@kernel.org
LKML-Reference: <20110303113435.GA2868@balbir.in.ibm.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-03-04 11:03:18 +01:00
Mark Brown 18b52ca5d0 ARM: S3C64XX: Update regulator names for debugfs compatiblity on SMDK6410
The debugfs support added to the regulator API (which has been merged
in during this merge window) creates directories for regulators named
after the display names for the regulators so replace / as a separator
for multiple supplies with + in the SMDK6410 machine.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2011-03-04 15:46:27 +09:00
Mark Brown 628e7eb5a7 ARM: S3C64XX: Fix build with WM1190 disabled and WM1192 enabled on SMDK6410
Avoid relying on implicit inclusion of machine.h

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2011-03-04 15:46:27 +09:00
Ben Dooks 0025283032 ARM: S3C64XX: Reduce output of s3c64xx_dma_init1()
Reduce the logging output of s3c64xx_dma_init1() as it is not useful
for normal bootup (and we get an overall indication of the registration
of the PL180 DMA block).

This removes the following output from the log:

s3c64xx_dma_init1: registering DMA 0 (e0808100)
s3c64xx_dma_init1: registering DMA 1 (e0808120)
s3c64xx_dma_init1: registering DMA 2 (e0808140)
s3c64xx_dma_init1: registering DMA 3 (e0808160)
s3c64xx_dma_init1: registering DMA 4 (e0808180)
s3c64xx_dma_init1: registering DMA 5 (e08081a0)
s3c64xx_dma_init1: registering DMA 6 (e08081c0)
s3c64xx_dma_init1: registering DMA 7 (e08081e0)

Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2011-03-04 15:46:27 +09:00
Mark Brown ac1e10bed1 ARM: S3C64XX: Tone down SDHCI debugging
The MMC core calls s3c6400_setup_sdhcp_cfg_card() very frequently, causing
the log message in there at KERN_INFO to be displayed a lot which is slow
and overly chatty. Convert the message into a pr_debug() to tone this down.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2011-03-04 15:46:27 +09:00
Ben Dooks 400b11a784 ARM: S3C64XX: Add clock for i2c1
The clock for i2c1 has been missing for a while, add it to the list of
clocks for the system and ensure it is initialised at startup.

Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2011-03-04 15:46:26 +09:00
Mark Brown 82e985eb69 ARM: S3C64XX: Staticise non-exported GPIO to interrupt functions
No need to put these in the global namespace and sparse gets upset.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2011-03-04 15:46:26 +09:00
Mark Brown 13c608d244 ARM: SAMSUNG: Include devs.h in dev-uart.c to prototype devices
Ensures that the declaration agrees with the definition and makes sparse
happy.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2011-03-04 15:46:26 +09:00
Ben Dooks b3f639c4fe ARM: S3C64XX: Fix keypad setup to configure correct number of rows
The call to s3c_gpio_cfgrange_nopull() takes a size and base
but this looks like it is trying to do base and end. This means
it is configuring too many GPIOs and on the case of the Cragganmore
means we're seeing an overflow of the ROW pins causing problems
with the keyboard driver.

Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2011-03-04 15:46:26 +09:00
Lars-Peter Clausen 6a53048dde ARM: S3C2440: Fix usage gpio bank j pin definitions on GTA02
The gta02 header file still uses the old S3C2410_GPJx defines instead of the
S3C2410_GPJ(x) macro. Since the S3C2410_GPJx defines have already been removed
this causes the following build failure:

	sound/soc/samsung/neo1973_wm8753.c: In function 'lm4853_set_spk':
	sound/soc/samsung/neo1973_wm8753.c:259: error: 'S3C2440_GPJ2' undeclared (first use in this function)
	sound/soc/samsung/neo1973_wm8753.c:259: error: (Each undeclared identifier is reported only once
	sound/soc/samsung/neo1973_wm8753.c:259: error: for each function it appears in.)
	sound/soc/samsung/neo1973_wm8753.c: In function 'lm4853_get_spk':
	sound/soc/samsung/neo1973_wm8753.c:267: error: 'S3C2440_GPJ2' undeclared (first use in this function)
	sound/soc/samsung/neo1973_wm8753.c: In function 'lm4853_event':
	sound/soc/samsung/neo1973_wm8753.c:276: error: 'S3C2440_GPJ1' undeclared (first use in this function)
	sound/soc/samsung/neo1973_wm8753.c: At top level:
	sound/soc/samsung/neo1973_wm8753.c:439: error: 'S3C2440_GPJ2' undeclared here (not in a function)
	sound/soc/samsung/neo1973_wm8753.c:440: error: 'S3C2440_GPJ1' undeclared here (not in a function)

This patches fixes the issue by doing a s,S3C2410_GPJ([\d]+),S3C2410_GPJ(\1),g
on the file.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2011-03-04 15:46:26 +09:00
Banajit Goswami f33f314961 ARM: S5P64X0: Fix number of GPIO lines in Bank F
This patch modifies the number of total GPIO lines for Bank F
for Samsung S5P6440 and S5P6450 SoCs from 2 to 16.
This is necessary as the GPIO lines from 0 to 13 are reserved
and only lines 14 and 15 are used. As during initialization,
the line number starts at 0, putting 2 does not solve the
intended purpose.

Signed-off-by: Banajit Goswami <banajit.g@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2011-03-04 15:46:26 +09:00