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| author | NeilBrown <neilb@suse.de> | 2012-03-13 11:21:20 +1100 |
|---|---|---|
| committer | NeilBrown <neilb@suse.de> | 2012-03-13 11:21:20 +1100 |
| commit | 547414d19fd72376ff2ecc42aac8d7a051f03d26 (patch) | |
| tree | d46f4726e9bc397a182b9c36665a941e70692281 /drivers/md/raid10.c | |
| parent | 1e3fa9bd5061778fb5cf4648e4e8321e8cbbb95b (diff) | |
| download | linux-547414d19fd72376ff2ecc42aac8d7a051f03d26.tar.gz linux-547414d19fd72376ff2ecc42aac8d7a051f03d26.tar.bz2 linux-547414d19fd72376ff2ecc42aac8d7a051f03d26.zip | |
md/raid10: remove unnecessary smp_mb() from end_sync_write
Recent commit 4ca40c2ce099e4f1ce3 (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>
Diffstat (limited to 'drivers/md/raid10.c')
| -rw-r--r-- | drivers/md/raid10.c | 4 |
1 files changed, 1 insertions, 3 deletions
diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c index 58c44d6453a0..1a19c962f860 100644 --- a/drivers/md/raid10.c +++ b/drivers/md/raid10.c @@ -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) |