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aio is unlikely 

Stick an unlikely() around is_aio(): I assert that most IO is synchronous.

Cc: Suparna Bhattacharya <suparna@in.ibm.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Benjamin LaHaise <bcrl@kvack.org>
Cc: Zach Brown <zach.brown@oracle.com>
Cc: Ulrich Drepper <drepper@redhat.com>
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Andrew Morton 2007-05-09 02:34:58 -07:00 committed by Linus Torvalds
parent b41eeef14d
commit b8522ead35
1 changed files with 2 additions and 1 deletions
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3
include/linux/aio.h
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@ -226,7 +226,8 @@ int FASTCALL(io_submit_one(struct kioctx *ctx, struct iocb __user *user_iocb,
__put_ioctx(kioctx); \
} while (0)
#define in_aio() !is_sync_wait(current->io_wait)
#define in_aio() (unlikely(!is_sync_wait(current->io_wait)))
/* may be used for debugging */
#define warn_if_async() \
do { \