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| author | Wengang Wang <wen.gang.wang@oracle.com> | 2014-04-04 01:46:46 +0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-04-04 03:20:53 +0400 |
| commit | c18ceab01240fd4c354b78d877571b729908e4a3 (patch) | |
| tree | d9c0107c30019e3299fe1b712d2eebaf832e55ed /fs/ocfs2/aops.h | |
| parent | 181a9a043b5424f2e6451297bbc27b196fe88475 (diff) | |
| download | linux-c18ceab01240fd4c354b78d877571b729908e4a3.tar.xz | |
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/aops.h')
| -rw-r--r-- | fs/ocfs2/aops.h | 5 |
1 files changed, 0 insertions, 5 deletions
diff --git a/fs/ocfs2/aops.h b/fs/ocfs2/aops.h index f671e49beb34..6cae155d54df 100644 --- a/fs/ocfs2/aops.h +++ b/fs/ocfs2/aops.h @@ -102,9 +102,4 @@ enum ocfs2_iocb_lock_bits { #define ocfs2_iocb_is_unaligned_aio(iocb) \ test_bit(OCFS2_IOCB_UNALIGNED_IO, (unsigned long *)&iocb->private) -#define OCFS2_IOEND_WQ_HASH_SZ 37 -#define ocfs2_ioend_wq(v) (&ocfs2__ioend_wq[((unsigned long)(v)) %\ - OCFS2_IOEND_WQ_HASH_SZ]) -extern wait_queue_head_t ocfs2__ioend_wq[OCFS2_IOEND_WQ_HASH_SZ]; - #endif /* OCFS2_FILE_H */ |