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| author | Andrew Morton <akpm@osdl.org> | 2007-05-09 02:34:58 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-05-09 12:30:54 -0700 |
| commit | b8522ead3534c6cd06752b47a3bc380956191a2a (patch) | |
| tree | 748ff93b4d5a49e6e21392c30ecad143694dcd94 /include/linux/aio.h | |
| parent | b41eeef14d7c73af6d16c7d02b7a939082a137ff (diff) | |
| download | lwn-b8522ead3534c6cd06752b47a3bc380956191a2a.tar.gz lwn-b8522ead3534c6cd06752b47a3bc380956191a2a.zip | |
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>
Diffstat (limited to 'include/linux/aio.h')
| -rw-r--r-- | include/linux/aio.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/include/linux/aio.h b/include/linux/aio.h index a30ef13c9e62..43dc2ebfaa0e 100644 --- a/include/linux/aio.h +++ b/include/linux/aio.h @@ -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 { \ |