[PATCH] md: provide proper rcu_dereference / rcu_assign_pointer annotations in md
Acked-by: <paulmck@us.ibm.com>
Signed-off-by: Suzanne Wood <suzannew@cs.pdx.edu>
Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index ce15455..061d265 100644
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -1374,7 +1374,7 @@
bi->bi_end_io = raid5_end_read_request;
rcu_read_lock();
- rdev = conf->disks[i].rdev;
+ rdev = rcu_dereference(conf->disks[i].rdev);
if (rdev && rdev->faulty)
rdev = NULL;
if (rdev)
@@ -1448,7 +1448,7 @@
rcu_read_lock();
for (i=0; i<mddev->raid_disks; i++) {
- mdk_rdev_t *rdev = conf->disks[i].rdev;
+ mdk_rdev_t *rdev = rcu_dereference(conf->disks[i].rdev);
if (rdev && !rdev->faulty && atomic_read(&rdev->nr_pending)) {
request_queue_t *r_queue = bdev_get_queue(rdev->bdev);
@@ -1493,7 +1493,7 @@
rcu_read_lock();
for (i=0; i<mddev->raid_disks && ret == 0; i++) {
- mdk_rdev_t *rdev = conf->disks[i].rdev;
+ mdk_rdev_t *rdev = rcu_dereference(conf->disks[i].rdev);
if (rdev && !rdev->faulty) {
struct block_device *bdev = rdev->bdev;
request_queue_t *r_queue = bdev_get_queue(bdev);
@@ -2165,7 +2165,7 @@
found = 1;
if (rdev->saved_raid_disk != disk)
conf->fullsync = 1;
- p->rdev = rdev;
+ rcu_assign_pointer(p->rdev, rdev);
break;
}
print_raid5_conf(conf);