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| author | Wengang Wang <wen.gang.wang@oracle.com> | 2014-04-03 14:46:46 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-04-03 16:20:53 -0700 |
| commit | c18ceab01240fd4c354b78d877571b729908e4a3 (patch) | |
| tree | d9c0107c30019e3299fe1b712d2eebaf832e55ed /fs/ocfs2/inode.h | |
| parent | 181a9a043b5424f2e6451297bbc27b196fe88475 (diff) | |
| download | blackbird-op-linux-c18ceab01240fd4c354b78d877571b729908e4a3.tar.gz blackbird-op-linux-c18ceab01240fd4c354b78d877571b729908e4a3.zip | |
ocfs2: change ip_unaligned_aio to of type mutex from atomit_t
There is a problem that waitqueue_active() may check stale data thus miss
a wakeup of threads waiting on ip_unaligned_aio.
The valid value of ip_unaligned_aio is only 0 and 1 so we can change it to
be of type mutex thus the above prolem is avoid. Another benifit is that
mutex which works as FIFO is fairer than wake_up_all().
Signed-off-by: Wengang Wang <wen.gang.wang@oracle.com>
Cc: Mark Fasheh <mfasheh@suse.com>
Cc: Joel Becker <jlbec@evilplan.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/ocfs2/inode.h')
| -rw-r--r-- | fs/ocfs2/inode.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/ocfs2/inode.h b/fs/ocfs2/inode.h index 621fc73bf23d..9f1580b506a5 100644 --- a/fs/ocfs2/inode.h +++ b/fs/ocfs2/inode.h @@ -44,7 +44,7 @@ struct ocfs2_inode_info struct rw_semaphore ip_xattr_sem; /* Number of outstanding AIO's which are not page aligned */ - atomic_t ip_unaligned_aio; + struct mutex ip_unaligned_aio; /* These fields are protected by ip_lock */ spinlock_t ip_lock; |
