md/raid5: Change or of some order to improve efficiency.

As the function call is the most expensive of these tests it should be
done later in the chain so that it can be avoided in some cases.

Signed-off-by: Jianpeng Ma <majianpeng@gmail.com>
Signed-off-by: NeilBrown <neilb@suse.de>

1 files changed, 4 insertions, 3 deletions

diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index f4e87bfc7567..f31882c1197a 100644
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -4672,9 +4672,10 @@ static inline sector_t sync_request(struct mddev *mddev, sector_t sector_nr, int
                 *skipped = 1;
                 return rv;
         }
-        if (!bitmap_start_sync(mddev->bitmap, sector_nr, &sync_blocks, 1) &&
-            !test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery) &&
-            !conf->fullsync && sync_blocks >= STRIPE_SECTORS) {
+        if (!test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery) &&
+            !conf->fullsync &&
+            !bitmap_start_sync(mddev->bitmap, sector_nr, &sync_blocks, 1) &&
+            sync_blocks >= STRIPE_SECTORS) {
                 /* we can skip this block, and probably more */
                 sync_blocks /= STRIPE_SECTORS;
                 *skipped = 1;