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authorJesper Juhl <jesper.juhl@gmail.com>2006-01-09 20:54:44 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2006-01-10 08:02:01 -0800
commit352d768b19408d3c019a3fa09fd5bfed99a55bc6 (patch)
tree1e3aee2364e1a9a610b05cab8c468f4647c1df31
parent3795e1616f16905889761536cdc266ebc51855e5 (diff)
[PATCH] Decrease number of pointer derefs in multipath.c
Decrease the number of pointer derefs in drivers/md/multipath.c Benefits of the patch: - Fewer pointer dereferences should make the code slightly faster. - Size of generated code is smaller - improved readability Signed-off-by: Jesper Juhl <jesper.juhl@gmail.com> Acked-by: Ingo Molnar <mingo@elte.hu> Cc: Alasdair G Kergon <agk@redhat.com> Acked-by: NeilBrown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
-rw-r--r--drivers/md/multipath.c7
1 files changed, 4 insertions, 3 deletions
diff --git a/drivers/md/multipath.c b/drivers/md/multipath.c
index e6aa309a66d..96f7af4ae40 100644
--- a/drivers/md/multipath.c
+++ b/drivers/md/multipath.c
@@ -303,6 +303,7 @@ static void print_multipath_conf (multipath_conf_t *conf)
static int multipath_add_disk(mddev_t *mddev, mdk_rdev_t *rdev)
{
multipath_conf_t *conf = mddev->private;
+ struct request_queue *q;
int found = 0;
int path;
struct multipath_info *p;
@@ -311,8 +312,8 @@ static int multipath_add_disk(mddev_t *mddev, mdk_rdev_t *rdev)
for (path=0; path<mddev->raid_disks; path++)
if ((p=conf->multipaths+path)->rdev == NULL) {
- blk_queue_stack_limits(mddev->queue,
- rdev->bdev->bd_disk->queue);
+ q = rdev->bdev->bd_disk->queue;
+ blk_queue_stack_limits(mddev->queue, q);
/* as we don't honour merge_bvec_fn, we must never risk
* violating it, so limit ->max_sector to one PAGE, as
@@ -320,7 +321,7 @@ static int multipath_add_disk(mddev_t *mddev, mdk_rdev_t *rdev)
* (Note: it is very unlikely that a device with
* merge_bvec_fn will be involved in multipath.)
*/
- if (rdev->bdev->bd_disk->queue->merge_bvec_fn &&
+ if (q->merge_bvec_fn &&
mddev->queue->max_sectors > (PAGE_SIZE>>9))
blk_queue_max_sectors(mddev->queue, PAGE_SIZE>>9);