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 <[email protected]> Signed-off-by: NeilBrown <[email protected]>
CamonZ · Apr 24, 2013 · 6f60804 · 6f60804
1 parent 3f810b6
commit 6f60804
Showing 1 changed file with 4 additions and 3 deletions.
diff --git 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;