From 7f7583d420231b9d09897afd57a957011b606a5b Mon Sep 17 00:00:00 2001 From: Jianpeng Ma Date: Thu, 11 Oct 2012 14:17:59 +1100 Subject: Subject: [PATCH] md:change resync_mismatches to atomic64_t to avoid races Now that multiple threads can handle stripes, it is safer to use an atomic64_t for resync_mismatches, to avoid update races. Signed-off-by: Jianpeng Ma Signed-off-by: NeilBrown --- drivers/md/raid10.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/md/raid10.c') diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c index fb5bd607e15c..146749b277c6 100644 --- a/drivers/md/raid10.c +++ b/drivers/md/raid10.c @@ -2011,7 +2011,7 @@ static void sync_request_write(struct mddev *mddev, struct r10bio *r10_bio) break; if (j == vcnt) continue; - mddev->resync_mismatches += r10_bio->sectors; + atomic64_add(r10_bio->sectors, &mddev->resync_mismatches); if (test_bit(MD_RECOVERY_CHECK, &mddev->recovery)) /* Don't fix anything. */ continue; -- cgit 1.4.1