From ff4a88bf1cedbe73ece1a6fad34650f21c06167c Mon Sep 17 00:00:00 2001 From: Heinz Mauelshagen Date: Wed, 15 Jun 2016 18:39:17 +0200 Subject: [PATCH] dm raid: avoid superfluous memory barriers on static metadata Signed-off-by: Heinz Mauelshagen Signed-off-by: Mike Snitzer --- drivers/md/dm-raid.c | 5 ----- 1 file changed, 5 deletions(-) diff --git a/drivers/md/dm-raid.c b/drivers/md/dm-raid.c index 248053d..4bf7747 100644 --- a/drivers/md/dm-raid.c +++ b/drivers/md/dm-raid.c @@ -366,14 +366,12 @@ static bool rs_is_reshapable(struct raid_set *rs) /* Return true, if raid set in @rs is recovering */ static bool rs_is_recovering(struct raid_set *rs) { - smp_rmb(); return rs->md.recovery_cp != MaxSector; } /* Return true, if raid set in @rs is reshaping */ static bool rs_is_reshaping(struct raid_set *rs) { - smp_rmb(); return rs->md.reshape_position != MaxSector; } @@ -1484,7 +1482,6 @@ static int rs_check_takeover(struct raid_set *rs) struct mddev *mddev = &rs->md; unsigned int near_copies; - smp_rmb(); if (rs->md.degraded) { rs->ti->error = "Can't takeover degraded raid set"; return -EPERM; @@ -1758,8 +1755,6 @@ static int rs_check_reshape(struct raid_set *rs) { struct mddev *mddev = &rs->md; - smp_rmb(); /* Make sure we access recent reshape position */ - if (!mddev->pers || !mddev->pers->check_reshape) rs->ti->error = "Reshape not supported"; else if (mddev->degraded) -- 2.7.4