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authorAndrew Morton <akpm@osdl.org>2007-05-09 02:34:58 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-05-09 12:30:54 -0700
commitb8522ead3534c6cd06752b47a3bc380956191a2a (patch)
tree748ff93b4d5a49e6e21392c30ecad143694dcd94
parentb41eeef14d7c73af6d16c7d02b7a939082a137ff (diff)
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>
-rw-r--r--include/linux/aio.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/include/linux/aio.h b/include/linux/aio.h
index a30ef13c9e6..43dc2ebfaa0 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 { \