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authorWengang Wang <wen.gang.wang@oracle.com>2014-04-03 14:46:46 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2014-04-03 16:20:53 -0700
commitc18ceab01240fd4c354b78d877571b729908e4a3 (patch)
treed9c0107c30019e3299fe1b712d2eebaf832e55ed /fs/ocfs2/aops.h
parent181a9a043b5424f2e6451297bbc27b196fe88475 (diff)
downloadop-kernel-dev-c18ceab01240fd4c354b78d877571b729908e4a3.zip
op-kernel-dev-c18ceab01240fd4c354b78d877571b729908e4a3.tar.gz
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.h5
1 files changed, 0 insertions, 5 deletions
diff --git a/fs/ocfs2/aops.h b/fs/ocfs2/aops.h
index f671e49..6cae155 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 */
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