Add cgroup_attach_task_all()
The existing cgroup_attach_task_current_cg() API is called by a thread to
attach another thread to all of its cgroups; this is unsuitable for cases
where a privileged task wants to attach itself to the cgroups of a less
privileged one, since the call must be made from the context of the target
task.
This patch adds a more generic cgroup_attach_task_all() API that allows
both the source task and to-be-moved task to be specified.
cgroup_attach_task_current_cg() becomes a specialization of the more
generic new function.
[menage@google.com: rewrote changelog]
[akpm@linux-foundation.org: address reviewer comments]
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Tested-by: Alex Williamson <alex.williamson@redhat.com>
Acked-by: Paul Menage <menage@google.com>
Cc: Li Zefan <lizf@cn.fujitsu.com>
Cc: Ben Blum <bblum@google.com>
Cc: Sridhar Samudrala <sri@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Fix the left-over old ifdef for PG_uncached in /proc/kpageflags. Now it's
used by x86, too.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Cc: Wu Fengguang <fengguang.wu@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
The gcov-kernel infrastructure expects that each object file is loaded
only once. This may not be true, e.g. when loading multiple kernel
modules which are linked to the same object file. As a result, loading
such kernel modules will result in incorrect gcov results while unloading
will cause a null-pointer dereference.
This patch fixes these problems by changing the gcov-kernel infrastructure
so that multiple profiling data sets can be associated with one debugfs
entry. It applies to 2.6.36-rc1.
Signed-off-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com>
Reported-by: Werner Spies <werner.spies@thalesgroup.com>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Kexec tools has been moved to http://kernel.org/pub/linux/utils/kernel/kexec/
as user-space code shouldn't be in /pub/linux/kernel
Signed-off-by: Simon Horman <horms@verge.net.au>
Acked-by: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
commit c2c6ca4 (direct-io: do not merge logically non-contiguous requests)
introduced a bug whereby all O_DIRECT I/Os were submitted a page at a time
to the block layer. The problem is that the code expected
dio->block_in_file to correspond to the current page in the dio. In fact,
it corresponds to the previous page submitted via submit_page_section.
This was purely an oversight, as the dio->cur_page_fs_offset field was
introduced for just this purpose. This patch simply uses the correct
variable when calculating whether there is a mismatch between contiguous
logical blocks and contiguous physical blocks (as described in the
comments).
I also switched the if conditional following this check to an else if, to
ensure that we never call dio_bio_submit twice for the same dio (in
theory, this should not happen, anyway).
I've tested this by running blktrace and verifying that a 64KB I/O was
submitted as a single I/O. I also ran the patched kernel through
xfstests' aio tests using xfs, ext4 (with 1k and 4k block sizes) and btrfs
and verified that there were no regressions as compared to an unpatched
kernel.
Signed-off-by: Jeff Moyer <jmoyer@redhat.com>
Acked-by: Josef Bacik <jbacik@redhat.com>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Chris Mason <chris.mason@oracle.com>
Cc: <stable@kernel.org> [2.6.35.x]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Added missing axis-mapping for HP ProBook 532x and HP Mini 5102.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Cc: Eric Piel <eric.piel@tremplin-utc.net>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
bob.picco@hp.com doesn't work any more and Bob says that he's unlikely to
work on hpet.c in the future.
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Acked-by: Bob Picco <bpicco@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Much (but not all) of the RTC state is kept in the RTC peripheral which
has its own power domain. Periodically (1 HZ), that state is synced from
one power domain to the other (peripheral->core). When we are resuming,
we need to wait for the sync to occur so that we don't get a mismatch of
reading undefined state in the rest of the driver.
Further, once the externally maintained bits have been synced back into
the core, we then need to restore the bits maintained in the core. In our
particular case, that is just the write completion interrupt bit.
If we don't do any of this, working with the RTC causes ~5 second delays
from time to time after waking up due to the write completion interrupt
never firing.
Reported-by: Michael Dean <mdean@aeronix.com>
Reported-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Acked-by: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
The int_clear helper takes a bitmask of interrupts to keep, not to
disable. When suspending without wakeup enabled, we want to disable
all interrupts, so use 0 (keep none) instead of -1 (keep all).
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Acked-by: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Some macro parameter references inside typeof() operator are not enclosed
with parenthesis. It should be safer to add them.
Signed-off-by: Huang Ying <ying.huang@intel.com>
Acked-by: Stefani Seibold <stefani@seibold.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
The introduction of support for SD combo cards breaks the initialization
of all CSR SDIO chips. The GO_IDLE (CMD0) in mmc_sd_get_cid() causes CSR
chips to be reset (this is non-standard behavior).
When initializing an SDIO card check for a combo card by using the memory
present bit in the R4 response to IO_SEND_OP_COND (CMD5). This avoids the
call to mmc_sd_get_cid() on an SDIO-only card.
Signed-off-by: David Vrabel <david.vrabel@csr.com>
Acked-by: Michal Mirolaw <mirq-linux@rere.qmqm.pl>
Cc: <linux-mmc@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* master.kernel.org:/home/rmk/linux-2.6-arm: (30 commits)
ARM: Update mach-types
ARM: Partially revert "Auto calculate ZRELADDR and provide option for exceptions"
ARM: Ensure PTE modifications via dma_alloc_coherent are visible
ARM: 6359/1: ep93xx: move clock initialization earlier
Revert "[ARM] pxa: remove now unnecessary dma_needs_bounce()"
ARM: 6352/1: perf: fix event validation
ARM: 6344/1: Mark CPU_32v6K as depended on CPU_V7
ARM: 6343/1: wire up fanotify and prlimit64 syscalls on ARM
ARM: 6330/1: perf: reword comments relating to perf_event_do_pending
ARM: pxa168fb: fix section mismatch
ARM: pxa: Make id const in pwm_probe()
ARM: pxa: fix CI_HSYNC and CI_VSYNC MFP defines for pxa300
ARM: pxa: remove __init from cpufreq_driver->init()
ARM: imx: set cache line size to 64 bytes for i.MX5
mx5/clock: fix clear bit fields issue in _clk_ccgr_disable function
mxc/tzic: add base address when accessing TZIC registers
ARM: mach-shmobile: ap4evb: fix write protect for SDHI1
ARM: mach-shmobile: ap4evb: modify FSI2 ID
ARM: mach-shmobile: do not enable the PLLC2 clock on init
ARM: mach-shmobile: Clock framework comment fix
...
When ia64 converted to using ticket locks, an inline implementation
of trylock/unlock in fsys.S was missed. This was not noticed because
in most circumstances it simply resulted in using the slow path because
the siglock was apparently not available (under old spinlock rules).
Problems occur when the ticket spinlock has value 0x0 (when first
initialised, or when it wraps around). At this point the fsys.S
code acquires the lock (changing the 0x0 to 0x1. If another process
attempts to get the lock at this point, it will change the value from
0x1 to 0x2 (using new ticket lock rules). Then the fsys.S code will
free the lock using old spinlock rules by writing 0x0 to it. From
here a variety of bad things can happen.
Signed-off-by: Tony Luck <tony.luck@intel.com>
Add a list_has_sctp_addr function to simplify loop
Based on a patches by Dan Carpenter and David Miller
Signed-off-by: Joe Perches <joe@perches.com>
Acked-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Partially revert e69edc7, which introduced automatic zreladdr
support. The change in the way the manual definition is defined
seems to be error and conflict prone. Go back to the original way
we were handling this for the time being, while keeping the automatic
zreladdr facility.
Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
By returning immediately if it was already initialized, do it as well at
symbol__exit, refusing multiple deinitializations.
This fixes problems in the kmem, sched and timechart commands.
Reported-by: Davidlohr Bueso <dave@gnu.org>
Cc: Davidlohr Bueso <dave@gnu.org>
Signed-off-by: Jovi Zhang <bookjovi@gmail.com>
LKML-Reference: AANLkTi=9Cn=R8SPMCRp5z+gEjXbaBHeb-AaOtRbuwwcn@mail.gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Currently sched_avg_update() (which updates rt_avg stats in the rq)
is getting called from scale_rt_power() (in the load balance context)
which doesn't take rq->lock.
Fix it by moving the sched_avg_update() to more appropriate
update_cpu_load() where the CFS load gets updated as well.
Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <1282596171.2694.3.camel@sbsiddha-MOBL3>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Since we have UP_PREPARE, we should also have UP_CANCELED.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: paulus <paulus@samba.org>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
ahci_do_softreset() compared the current time and deadline in reverse
when calculating timeout for SRST issue. The result is that if
@deadline is in future, SRST is issued with 0 timeout, which hasn't
caused any problem because it later waits for DRDY with the correct
timeout. If deadline is already exceeded by the time SRST is about to
be issued, the timeout calculation underflows and if the device
doesn't respond, timeout doesn't trigger for a _very_ long time.
Reverse the incorrect comparison order.
Signed-off-by: Tejun Heo <tj@kernel.org>
Reported-by: Anssi Hannula <anssi.hannula@iki.fi>
Tested-by: Gwendal Grignou <gwendal@google.com>
Cc: stable@kernel.org
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
x % 1 always evaluates to 0, which clearly isn't the intent. The
author probably had "% 2" or "& 1" in mind, and mispelled it.
Signed-off-by: Jean Delvare <jdelvare@suse.de>
Cc: Jeff Garzik <jgarzik@pobox.com>
Cc: Alan Cox <alan@linux.intel.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Without this patch you will not be able to register the first block
because of the second association call on at91_add_device_tc().
Signed-off-by: Fabian Godehardt <fg@emlix.com>
[nicolas.ferre@atmel.com: change tcb1_clk to fake child clock of tcb0_clk]
Acked-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Acked-by: Andrew Victor <linux@maxim.org.za>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
While registering clock allow to set parent clock other
than mck. It is useful for clocks than can be seen as
child clock of a peripheral.
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Acked-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Acked-by: Andrew Victor <linux@maxim.org.za>
The CPU_STARTING callback was added upstream with the intention
of being used for KVM, specifically for the hardware enablement
that must be done before we can run in hardware virt. It had
bugs on the x86_64 architecture at the time, where it was called
after CPU_ONLINE. The arches have since merged and the bug is
gone.
It might be noted other features should probably start making
use of this callback; microcode updates in particular which
might be fixing important erratums would be best applied before
beginning to run user tasks.
Signed-off-by: Zachary Amsden <zamsden@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
lg_lock_global() currently only acquires spinlocks for online CPUs, but
it's meant to lock all possible CPUs. Lglock-protected resources may be
associated with removed CPUs - and, indeed, that could happen with the
per-superblock open files lists.
At Nick's suggestion, change for_each_online_cpu() to
for_each_possible_cpu() to protect accesses to those resources.
Cc: Al Viro <viro@ZenIV.linux.org.uk>
Acked-by: Nick Piggin <npiggin@kernel.dk>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
So it can be used by all that need to check for that.
Signed-off-by: Stefan Bader <stefan.bader@canonical.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Currently we have a exact mapping of a connector onto an encoder for its
whole lifetime. Make this an explicit property of the structure and so
simplify the code.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Why iterate all the crtcs to find the pipe, when we already know which
crtc is attached to which pipe?
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
[Patch is slightly larger than is strictly necessary to fixup
surrounding checkpatch.pl errors.]
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband:
RDMA/nes: Fix hang with modified FIN handling on A0 cards
RDMA/nes: Change state to closing after FIN
RDMA/nes: Fix double CLOSE event indication crash
RDMA/nes: Write correct register write to set TX pause param
RDMA/cxgb3: Don't exceed the max HW CQ depth
* 'fixes' of git://oss.oracle.com/git/tma/linux-2.6:
ocfs2: Fix orphan add in ocfs2_create_inode_in_orphan
ocfs2: split out ocfs2_prepare_orphan_dir() into locking and prep functions
ocfs2: allow return of new inode block location before allocation of the inode
ocfs2: use ocfs2_alloc_dinode_update_counts() instead of open coding
ocfs2: split out inode alloc code from ocfs2_mknod_locked
Ocfs2: Fix a regression bug from mainline commit(6b933c8e6f).
ocfs2: Fix deadlock when allocating page
ocfs2: properly set and use inode group alloc hint
ocfs2: Use the right group in nfs sync check.
ocfs2: Flush drive's caches on fdatasync
ocfs2: make __ocfs2_page_mkwrite handle file end properly.
ocfs2: Fix incorrect checksum validation error
ocfs2: Fix metaecc error messages
we're using a pointer through a freed command to reset the request,
which has shown up as an oops with slab poisoning:
Reported-by: Tejun Heo <tj@kernel.org>
Reported-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
Alex Shi found a regression when doing ffsb test. The test has several threads,
and each thread creates a small file, write to it and then delete it. ffsb
reports about 20% regression and Alex bisected it to 43d2932d88. The test
will call __mark_inode_dirty 3 times. without this commit, we only take
inode_lock one time, while with it, we take the lock 3 times with flags (
I_DIRTY_SYNC,I_DIRTY_PAGES,I_DIRTY). Perf shows the lock contention increased
too much. Below proposed patch fixes it.
fs is allocating blocks, which usually means file writes and the inode
will be dirtied soon. We fully dirty the inode to reduce some inode_lock
contention in several calls of __mark_inode_dirty.
Jan Kara: Added comment.
Signed-off-by: Shaohua Li <shaohua.li@intel.com>
Signed-off-by: Alex Shi <alex.shi@intel.com>
Signed-off-by: Jan Kara <jack@suse.cz>
If we are busy, then we may have woken up the wait_request handler but
not yet serviced it before the hang check fires. So in hang check,
double check that the i915_gem_do_wait_request() is still pending the
wake-up before declaring all hope lost.
Fixes regression with e78d73b16b.
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=30073
Reported-and-tested-by: Sitsofe Wheeler <sitsofe@yahoo.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
If we pass in a device which is higher than SNDRV_RAWMIDI_DEVICES then
the "next device" should be -1. This function just returns device + 1.
But the main thing is that "device + 1" can lead to a (harmless) integer
overflow and that annoys static analysis tools.
[fix the case for device == SNDRV_RAWMIDI_DEVICE by tiwai]
Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
The PL022 SPI bus is sometimes used for early stuff like
regulators that need to be present at module_init() time, so
we move this to a subsys_initcall().
Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Use netdev_alloc_skb_ip_align() helper and do correct allocation
Tested-by: Abraham Arce <x0066660@ti.com>
Signed-off-by: Abraham Arce <x0066660@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
commit 30fff923 introduced in linux-2.6.33 (udp: bind() optimisation)
added a secondary hash on UDP, hashed on (local addr, local port).
Problem is that following sequence :
fd = socket(...)
connect(fd, &remote, ...)
not only selects remote end point (address and port), but also sets
local address, while UDP stack stored in secondary hash table the socket
while its local address was INADDR_ANY (or ipv6 equivalent)
Sequence is :
- autobind() : choose a random local port, insert socket in hash tables
[while local address is INADDR_ANY]
- connect() : set remote address and port, change local address to IP
given by a route lookup.
When an incoming UDP frame comes, if more than 10 sockets are found in
primary hash table, we switch to secondary table, and fail to find
socket because its local address changed.
One solution to this problem is to rehash datagram socket if needed.
We add a new rehash(struct socket *) method in "struct proto", and
implement this method for UDP v4 & v6, using a common helper.
This rehashing only takes care of secondary hash table, since primary
hash (based on local port only) is not changed.
Reported-by: Krzysztof Piotr Oledzki <ole@ans.pl>
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Tested-by: Krzysztof Piotr Oledzki <ole@ans.pl>
Signed-off-by: David S. Miller <davem@davemloft.net>
During suspend, the power.completion is expected to be set when a
device has not yet started suspending. Set it on init to fix a
corner case where a device is resumed when its parent has never
suspended.
Consider three drivers, A, B, and C. The parent of A is C, and C
has async_suspend set. On boot, C->power.completion is initialized
to 0.
During the first suspend:
suspend_devices_and_enter(...)
dpm_resume(...)
device_suspend(A)
device_suspend(B) returns error, aborts suspend
dpm_resume_end(...)
dpm_resume(...)
device_resume(A)
dpm_wait(A->parent == C)
wait_for_completion(C->power.completion)
The wait_for_completion will never complete, because
complete_all(C->power.completion) will only be called from
device_suspend(C) or device_resume(C), neither of which is called
if suspend is aborted before C.
After a successful suspend->resume cycle, where B doesn't abort
suspend, C->power.completion is left in the completed state by the
call to device_resume(C), and the same call path will work if B
aborts suspend.
Signed-off-by: Colin Cross <ccross@android.com>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Changing state to CLOSING when FIN is received causes A0 cards to
hang. Fix this by checking for A0 cards in FIN handling.
Signed-off-by: Faisal Latif <faisal.latif@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
When the driver receives an AE for FIN received, it closes the
connection without changing the state of the connection in the
hardware to closing. By changing the state to closing, hardware will
do a normal close sequence.
Signed-off-by: Faisal Latif <faisal.latif@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
During a stress testing in a large cluster, multiple close event are
detected and BUG() is hit in the iWARP core. The cause is that the
active node gave up while waiting for an MPA response from the peer
and tried to close the connection by sending RST. The passive node
driver receives the RST but is waiting for MPA response from the user.
When the MPA accept is received, the driver offloads the connection
and sends a CLOSE event. The driver gets an AE indicating RESET
received and also sends a CLOSE event, hitting a BUG().
Fix this by correcting RESET handling and sending CLOSE events.
Signed-off-by: Faisal Latif <faisal.latif@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
Blackhole routes are used when xfrm_lookup() returns -EREMOTE (error
triggered by IKE for example), hence this kind of route is always
temporary and so we should check if a better route exists for next
packets.
Bug has been introduced by commit d11a4dc18b.
Signed-off-by: Jianzhao Wang <jianzhao.wang@6wind.com>
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Setting TX pause param writes to the wrong register location causing
the adapter to hang. Correct the define used to write the reigster.
Addresses: https://bugs.openfabrics.org/show_bug.cgi?id=2116
Reported-by: Shiri Franchi <shirif@voltaire.com>
Signed-off-by: Chien Tung <chien.tin.tung@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
