Commit 547414d1 authored Mar 13, 2012 by NeilBrown

md/raid10: remove unnecessary smp_mb() from end_sync_write



Recent commit 4ca40c2c (md/raid10: Allow replacement device ...)
added an smp_mb in end_sync_write.
This was to close a possible race with raid10_remove_disk.
However there is no such race as it is never attempted to remove a
disk while resync (or recovery) is happening.
so the smp_mb is just noise.

Signed-off-by: NeilBrown <neilb@suse.de>

parent 1e3fa9bd

drivers/md/raid10.c

+1 −3

Original line number	Diff line number	Diff line
		@@ -1682,10 +1682,8 @@ static void end_sync_write(struct bio *bio, int error)
		d = find_bio_disk(conf, r10_bio, bio, &slot, &repl);
		if (repl)
		rdev = conf->mirrors[d].replacement;
		if (!rdev) {
		smp_mb();
		else
		rdev = conf->mirrors[d].rdev;
		}

		if (!uptodate) {
		if (repl)