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* 'bugfixes' of git://git.linux-nfs.org/projects/trondmy/nfs-2.6:
NFS: Don't clobber the attribute type in nfs_update_inode()
NFS: Fix a umount race
NFS: Fix an Oops when truncating a file
NFS: Ensure that we handle NFS4ERR_STALE_STATEID correctly
NFSv4.1: Don't call nfs4_schedule_state_recovery() unnecessarily
NFSv4: Don't allow posix locking against servers that don't support it
NFSv4: Ensure that the NFSv4 locking can recover from stateid errors
NFS: Avoid warnings when CONFIG_NFS_V4=n
NFS: Make nfs_commitdata_release static
NFS: Try to commit unstable writes in nfs_release_page()
NFS: Fix a reference leak in nfs_wb_cancel_page()
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* git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-2.6-fixes:
GFS2: Extend umount wait coverage to full glock lifetime
GFS2: Wait for unlock completion on umount
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git://git.kernel.org/pub/scm/linux/kernel/git/ryusuke/nilfs2
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ryusuke/nilfs2:
nilfs2: fix potential leak of dirty data on umount
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If the NFS_ATTR_FATTR_TYPE field isn't set in fattr->valid, then we should
not set the S_IFMT part of inode->i_mode.
Reported-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
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Ensure that we unregister the bdi before kill_anon_super() calls
ida_remove() on our device name.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Cc: stable@kernel.org
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The VM/VFS does not allow mapping->a_ops->invalidatepage() to fail.
Unfortunately, nfs_wb_page_cancel() may fail if a fatal signal occurs.
Since the NFS code assumes that the page stays mapped for as long as the
writeback is active, we can end up Oopsing (among other things).
The only safe fix here is to convert nfs_wait_on_request(), so as to make
it uninterruptible (as is already the case with wait_on_page_writeback()).
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Cc: stable@kernel.org
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Although all glocks are, by the time of the umount glock wait,
scheduled for demotion, some of them haven't made it far
enough through the process for the original set of waiting
code to wait for them.
This extends the ref count to the whole glock lifetime in order
to ensure that the waiting does catch all glocks. It does make
it a bit more invasive, but it seems the only sensible solution
at the moment.
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
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This patch adds a wait on umount between the point at which we
dispose of all glocks and the point at which we unmount the
lock protocol. This ensures that we've received all the replies
to our unlock requests before we stop the locking.
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
Reported-by: Fabio M. Di Nitto <fdinitto@redhat.com>
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The cache alias problem will happen if the changes of user shared mapping
is not flushed before copying, then user and kernel mapping may be mapped
into two different cache line, it is impossible to guarantee the coherence
after iov_iter_copy_from_user_atomic. So the right steps should be:
flush_dcache_page(page);
kmap_atomic(page);
write to page;
kunmap_atomic(page);
flush_dcache_page(page);
More precisely, we might create two new APIs flush_dcache_user_page and
flush_dcache_kern_page to replace the two flush_dcache_page accordingly.
Here is a snippet tested on omap2430 with VIPT cache, and I think it is
not ARM-specific:
int val = 0x11111111;
fd = open("abc", O_RDWR);
addr = mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0);
*(addr+0) = 0x44444444;
tmp = *(addr+0);
*(addr+1) = 0x77777777;
write(fd, &val, sizeof(int));
close(fd);
The results are not always 0x11111111 0x77777777 at the beginning as expected. Sometimes we see 0x44444444 0x77777777.
Signed-off-by: Anfei <anfei.zhou@gmail.com>
Cc: Russell King <rmk@arm.linux.org.uk>
Cc: Miklos Szeredi <miklos@szeredi.hu>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>
Cc: <linux-arch@vger.kernel.org>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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* 'for-linus' of git://git.kernel.dk/linux-2.6-block:
cfq-iosched: Do not idle on async queues
blk-cgroup: Fix potential deadlock in blk-cgroup
block: fix bugs in bio-integrity mempool usage
block: fix bio_add_page for non trivial merge_bvec_fn case
drbd: null dereference bug
drbd: fix max_segment_size initialization
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* git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-2.6-fixes:
GFS2: Use GFP_NOFS for alloc structure
GFS2: Fix previous patch
GFS2: Don't withdraw on partial rindex entries
GFS2: Fix refcnt leak on gfs2_follow_link() error path
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Commit 221af7f87b9 ("Split 'flush_old_exec' into two functions") split
the function at the point of no return - ie right where there were no
more error cases to check. That made sense from a technical standpoint,
but when we then also combined it with the actual personality setting
going in between flush_old_exec() and setup_new_exec(), it needs to be a
bit more careful.
In particular, we need to make sure that we really flush the old
personality bits in the 'flush' stage, rather than later in the 'setup'
stage, since otherwise we might be flushing the _new_ personality state
that we're just setting up.
So this moves the flags and personality flushing (and 'flush_thread()',
which is the arch-specific function that generally resets lazy FP state
etc) of the old process into flush_old_exec(), so that it doesn't affect
any state that execve() is setting up for the new process environment.
This was reported by Michal Simek as breaking his Microblaze qemu
environment.
Reported-and-tested-by: Michal Simek <michal.simek@petalogix.com>
Cc: Peter Anvin <hpa@zytor.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/frederic/random-tracing
* 'reiserfs/kill-bkl' of git://git.kernel.org/pub/scm/linux/kernel/git/frederic/random-tracing:
reiserfs: Fix vmalloc call under reiserfs lock
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This is called under a glock, so its a good plan to use GFP_NOFS
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
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The do_div() call needs to remain.
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
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ince gfs2 writes the rindex file a block at a time, and releases the
exclusive lock after each block, it is possible that another process
will grab the lock in the middle of the write. Since rindex entries are
not an even divisor of blocks, that other process may see partial
entries. On grows, this is fine. The process can simply ignore the the
partial entires. Previously, the code withdrew when it saw partial
entries. Now it simply ignores them.
Signed-off-by: Benjamin Marzinski <bmarzins@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
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This fixes incorrect usage of nilfs_segctor_confirm() test function in
nilfs_segctor_destroy(); nilfs_segctor_confirm() returns zero if the
filesystem is not clean, so its use in nilfs_segctor_destroy() needs
inversion.
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
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Fix two bugs in the bio integrity code:
use_bip_pool() always returns 0 because it checks against the wrong limit,
causing the mempool to be used only when regular allocation fails.
When the mempool is used as a fallback we don't free the data properly.
Signed-Off-By: Chuck Ebbert <cebbert@redhat.com>
Acked-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
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* git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable:
Btrfs: check total number of devices when removing missing
Btrfs: check return value of open_bdev_exclusive properly
Btrfs: do not mark the chunk as readonly if in degraded mode
Btrfs: run orphan cleanup on default fs root
Btrfs: fix a memory leak in btrfs_init_acl
Btrfs: Use correct values when updating inode i_size on fallocate
Btrfs: remove tree_search() in extent_map.c
Btrfs: Add mount -o compress-force
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'flush_old_exec()' is the point of no return when doing an execve(), and
it is pretty badly misnamed. It doesn't just flush the old executable
environment, it also starts up the new one.
Which is very inconvenient for things like setting up the new
personality, because we want the new personality to affect the starting
of the new environment, but at the same time we do _not_ want the new
personality to take effect if flushing the old one fails.
As a result, the x86-64 '32-bit' personality is actually done using this
insane "I'm going to change the ABI, but I haven't done it yet" bit
(TIF_ABI_PENDING), with SET_PERSONALITY() not actually setting the
personality, but just the "pending" bit, so that "flush_thread()" can do
the actual personality magic.
This patch in no way changes any of that insanity, but it does split the
'flush_old_exec()' function up into a preparatory part that can fail
(still called flush_old_exec()), and a new part that will actually set
up the new exec environment (setup_new_exec()). All callers are changed
to trivially comply with the new world order.
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Cc: stable@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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If you have a disk failure in RAID1 and then add a new disk to the
array, and then try to remove the missing volume, it will fail. The
reason is the sanity check only looks at the total number of rw devices,
which is just 2 because we have 2 good disks and 1 bad one. Instead
check the total number of devices in the array to make sure we can
actually remove the device. Tested this with a failed disk setup and
with this test we can now run
btrfs-vol -r missing /mount/point
and it works fine.
Signed-off-by: Josef Bacik <josef@redhat.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
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Hit this problem while testing RAID1 failure stuff. open_bdev_exclusive
returns ERR_PTR(), not NULL. So change the return value properly. This
is important if you accidently specify a device that doesn't exist when
trying to add a new device to an array, you will panic the box
dereferencing bdev.
Signed-off-by: Josef Bacik <josef@redhat.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
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If a RAID setup has chunks that span multiple disks, and one of those
disks has failed, btrfs_chunk_readonly will return 1 since one of the
disks in that chunk's stripes is dead and therefore not writeable. So
instead if we are in degraded mode, return 0 so we can go ahead and
allocate stuff. Without this patch all of the block groups in a RAID1
setup will end up read-only, which will mean we can't add new disks to
the array since we won't be able to make allocations.
Signed-off-by: Josef Bacik <josef@redhat.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
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This patch revert's commit
6c090a11e1c403b727a6a8eff0b97d5fb9e95cb5
Since it introduces this problem where we can run orphan cleanup on a
volume that can have orphan entries re-added. Instead of my original
fix, Yan Zheng pointed out that we can just revert my original fix and
then run the orphan cleanup in open_ctree after we look up the fs_root.
I have tested this with all the tests that gave me problems and this
patch fixes both problems. Thanks,
Signed-off-by: Josef Bacik <josef@redhat.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
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In btrfs_init_acl() cloned acl is not released
Signed-off-by: Yang Hongyang <yanghy@cn.fujitsu.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
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commit f2bc9dd07e3424c4ec5f3949961fe053d47bc825
Author: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Date: Wed Jan 20 12:57:53 2010 +0530
Btrfs: Use correct values when updating inode i_size on fallocate
Even though we allocate more, we should be updating inode i_size
as per the arguments passed
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
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This patch removes tree_search() in extent_map.c because it is not called by
anything.
Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
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The default btrfs mount -o compress mode will quickly back off
compressing a file if it notices that compression does not reduce the
size of the data being written. This can save considerable CPU because
all future writes to the file go through uncompressed.
But some files are both very large and have mixed data stored in
them. In that case, we want to add the ability to always try
compressing data before writing it.
This commit adds mount -o compress-force. A later commit will add
a new inode flag that does the same thing.
Signed-off-by: Chris Mason <chris.mason@oracle.com>
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We have to properly decrease bi_size in order to merge_bvec_fn return
right result. Otherwise this result in false merge rejects for two
absolutely valid bio_vecs. This may cause significant performance
penalty for example fs_block_size == 1k and block device is raid0 with
small chunk_size = 8k. Then it is impossible to merge 7-th fs-block in
to bio which already has 6 fs-blocks.
Cc: <stable@kernel.org>
Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
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Vmalloc is called to allocate journal->j_cnode_free_list but
we hold the reiserfs lock at this time, which raises a
{RECLAIM_FS-ON-W} -> {IN-RECLAIM_FS-W} lock inversion.
Just drop the reiserfs lock at this time, as it's not even
needed but kept for paranoid reasons.
This fixes:
[ INFO: inconsistent lock state ]
2.6.33-rc5 #1
---------------------------------
inconsistent {RECLAIM_FS-ON-W} -> {IN-RECLAIM_FS-W} usage.
kswapd0/313 [HC0[0]:SC0[0]:HE1:SE1] takes:
(&REISERFS_SB(s)->lock){+.+.?.}, at: [<c11118c8>]
reiserfs_write_lock_once+0x28/0x50
{RECLAIM_FS-ON-W} state was registered at:
[<c104ee32>] mark_held_locks+0x62/0x90
[<c104eefa>] lockdep_trace_alloc+0x9a/0xc0
[<c108f7b6>] kmem_cache_alloc+0x26/0xf0
[<c108621c>] __get_vm_area_node+0x6c/0xf0
[<c108690e>] __vmalloc_node+0x7e/0xa0
[<c1086aab>] vmalloc+0x2b/0x30
[<c110e1fb>] journal_init+0x6cb/0xa10
[<c10f90a2>] reiserfs_fill_super+0x342/0xb80
[<c1095665>] get_sb_bdev+0x145/0x180
[<c10f68e1>] get_super_block+0x21/0x30
[<c1094520>] vfs_kern_mount+0x40/0xd0
[<c1094609>] do_kern_mount+0x39/0xd0
[<c10aaa97>] do_mount+0x2c7/0x6d0
[<c10aaf06>] sys_mount+0x66/0xa0
[<c16198a7>] mount_block_root+0xc4/0x245
[<c1619a81>] mount_root+0x59/0x5f
[<c1619b98>] prepare_namespace+0x111/0x14b
[<c1619269>] kernel_init+0xcf/0xdb
[<c100303a>] kernel_thread_helper+0x6/0x1c
irq event stamp: 63236801
hardirqs last enabled at (63236801): [<c134e7fa>]
__mutex_unlock_slowpath+0x9a/0x120
hardirqs last disabled at (63236800): [<c134e799>]
__mutex_unlock_slowpath+0x39/0x120
softirqs last enabled at (63218800): [<c102f451>] __do_softirq+0xc1/0x110
softirqs last disabled at (63218789): [<c102f4ed>] do_softirq+0x4d/0x60
other info that might help us debug this:
2 locks held by kswapd0/313:
#0: (shrinker_rwsem){++++..}, at: [<c1074bb4>] shrink_slab+0x24/0x170
#1: (&type->s_umount_key#19){++++..}, at: [<c10a2edd>]
shrink_dcache_memory+0xfd/0x1a0
stack backtrace:
Pid: 313, comm: kswapd0 Not tainted 2.6.33-rc5 #1
Call Trace:
[<c134db2c>] ? printk+0x18/0x1c
[<c104e7ef>] print_usage_bug+0x15f/0x1a0
[<c104ebcf>] mark_lock+0x39f/0x5a0
[<c104d66b>] ? trace_hardirqs_off+0xb/0x10
[<c1052c50>] ? check_usage_forwards+0x0/0xf0
[<c1050c24>] __lock_acquire+0x214/0xa70
[<c10438c5>] ? sched_clock_cpu+0x95/0x110
[<c10514fa>] lock_acquire+0x7a/0xa0
[<c11118c8>] ? reiserfs_write_lock_once+0x28/0x50
[<c134f03f>] mutex_lock_nested+0x5f/0x2b0
[<c11118c8>] ? reiserfs_write_lock_once+0x28/0x50
[<c11118c8>] ? reiserfs_write_lock_once+0x28/0x50
[<c11118c8>] reiserfs_write_lock_once+0x28/0x50
[<c10f05b0>] reiserfs_delete_inode+0x50/0x140
[<c10a653f>] ? generic_delete_inode+0x5f/0x150
[<c10f0560>] ? reiserfs_delete_inode+0x0/0x140
[<c10a657c>] generic_delete_inode+0x9c/0x150
[<c10a666d>] generic_drop_inode+0x3d/0x60
[<c10a5597>] iput+0x47/0x50
[<c10a2a4f>] dentry_iput+0x6f/0xf0
[<c10a2af4>] d_kill+0x24/0x50
[<c10a2d3d>] __shrink_dcache_sb+0x21d/0x2b0
[<c10a2f0f>] shrink_dcache_memory+0x12f/0x1a0
[<c1074c9e>] shrink_slab+0x10e/0x170
[<c1075177>] kswapd+0x477/0x6a0
[<c1072d10>] ? isolate_pages_global+0x0/0x1b0
[<c103e160>] ? autoremove_wake_function+0x0/0x40
[<c1074d00>] ? kswapd+0x0/0x6a0
[<c103de6c>] kthread+0x6c/0x80
[<c103de00>] ? kthread+0x0/0x80
[<c100303a>] kernel_thread_helper+0x6/0x1c
Reported-by: Alexander Beregalov <a.beregalov@gmail.com>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Christian Kujau <lists@nerdbynature.de>
Cc: Chris Mason <chris.mason@oracle.com>
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if 9P ->get_sb() fails late (at root inode or root dentry
allocation), we'll hit its ->kill_sb() with NULL ->s_root
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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if we'd just got success from it, vfsmount won't be NULL
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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double iput(), leaks...
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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Error handling in that sucker got broken back in 2003. If function
returns 0 on failure, it's not nice to add return -EINVAL into it.
Adding return 1 on other failure exits is also not a good thing (and
yes, original success exits with 1 and some of failure exits with 0
are still there; so's the original logics in callers).
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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A couple of fields in affs_sb_info is used in follow_link() and
symlink() for handling AFFS "absolute" symlinks. Need locking
against affs_remount() updates.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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Commit 703625118069f9f8960d356676662d3db5a9d116 exposed that f_modown()
should call write_lock_irqsave instead of just write_lock_irq so that
because a caller could have a spinlock held and it would not be good to
renable interrupts.
Cc: Eric W. Biederman <ebiederm@xmission.com>
Cc: Al Viro <viro@ZenIV.linux.org.uk>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Tavis Ormandy <taviso@google.com>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Even if the server is crazy, we should be able to mark the stateid as being
bad, to ensure it gets recovered.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Reviewed-by: Chuck Lever <chuck.lever@oracle.com>
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Currently, nfs4_handle_exception() will call it twice if called with an
error of -NFS4ERR_STALE_CLIENTID, -NFS4ERR_STALE_STATEID or
-NFS4ERR_EXPIRED.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Reviewed-by: Chuck Lever <chuck.lever@oracle.com>
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Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Cc: stable@kernel.org
Reviewed-by: Chuck Lever <chuck.lever@oracle.com>
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In most cases, we just want to mark the lock_stateid sequence id as being
uninitialised.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Cc: stable@kernel.org
Reviewed-by: Chuck Lever <chuck.lever@oracle.com>
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Avoid the following warnings when CONFIG_NFS_V4=n:
fs/nfs/sysctl.c:19: warning: unused variable `nfs_set_port_max'
fs/nfs/sysctl.c:18: warning: unused variable `nfs_set_port_min'
by making those variables contingent on NFSv4 being configured.
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Reviewed-by: Chuck Lever <chuck.lever@oracle.com>
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The symbol nfs_commitdata_release is only used locally
in this file. Make it static to prevent the following sparse warning:
warning: symbol 'nfs_commitdata_release' was not declared. Should it be static?
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Cc: Trond Myklebust <Trond.Myklebust@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Reviewed-by: Chuck Lever <chuck.lever@oracle.com>
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If someone calls nfs_release_page(), we presumably already know that the
page is clean, however it may be holding an unstable write.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Cc: stable@kernel.org
Reviewed-by: Chuck Lever <chuck.lever@oracle.com>
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Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Cc: stable@kernel.org
Reviewed-by: Chuck Lever <chuck.lever@oracle.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4
* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4:
ext4: Drop EXT4_GET_BLOCKS_UPDATE_RESERVE_SPACE flag
ext4: Fix quota accounting error with fallocate
ext4: Handle -EDQUOT error on write
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KVM needs a wait to atomically remove themselves from the eventfd ->poll()
wait queue head, in order to handle correctly their IRQfd deassign
operation.
This patch introduces such API, plus a way to read an eventfd from its
context.
Signed-off-by: Davide Libenzi <davidel@xmailserver.org>
Signed-off-by: Avi Kivity <avi@redhat.com>
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* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty-2.6:
tty: fix race in tty_fasync
serial: serial_cs: oxsemi quirk breaks resume
serial: imx: bit &/| confusion
serial: Fix crash if the minimum rate of the device is > 9600 baud
serial-core: resume serial hardware with no_console_suspend
serial: 8250_pnp: use wildcard for serial Wacom tablets
nozomi: quick fix for the close/close bug
compat_ioctl: Supress "unknown cmd" message on serial /dev/console
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* 'for-linus' of git://git.kernel.dk/linux-2.6-block:
fs/bio.c: fix shadows sparse warning
drbd: The kernel code is now equivalent to out of tree release 8.3.7
drbd: Allow online resizing of DRBD devices while peer not reachable (needs to be explicitly forced)
drbd: Don't go into StandAlone mode when authentification failes because of network error
drivers/block/drbd/drbd_receiver.c: correct NULL test
cfq-iosched: Respect ioprio_class when preempting
genhd: overlapping variable definition
block: removed unused as_io_context
DM: Fix device mapper topology stacking
block: bdev_stack_limits wrapper
block: Fix discard alignment calculation and printing
block: Correct handling of bottom device misaligment
drbd: check on CONFIG_LBDAF, not LBD
drivers/block/drbd: Correct NULL test
drbd: Silenced an assert that could triggered after changing write ordering method
drbd: Kconfig fix
drbd: Fix for a race between IO and a detach operation [Bugz 262]
drbd: Use drbd_crypto_is_hash() instead of an open coded check
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