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authorSuzanne Wood <suzannew@cs.pdx.edu>2005-11-08 21:39:27 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2005-11-09 07:56:37 -0800
commitd6065f7bf8bec170c9c56524a250093ce73ca5d9 (patch)
tree336c7db10aa8cee48386171e3de7569fca01dcfd /drivers/md/multipath.c
parent9d88883e68f404d5581bd391713ceef470ea53a9 (diff)
[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>
Diffstat (limited to 'drivers/md/multipath.c')
-rw-r--r--drivers/md/multipath.c8
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/md/multipath.c b/drivers/md/multipath.c
index c06f4474192..ae2c5fd6105 100644
--- a/drivers/md/multipath.c
+++ b/drivers/md/multipath.c
@@ -63,7 +63,7 @@ static int multipath_map (multipath_conf_t *conf)
rcu_read_lock();
for (i = 0; i < disks; i++) {
- mdk_rdev_t *rdev = conf->multipaths[i].rdev;
+ mdk_rdev_t *rdev = rcu_dereference(conf->multipaths[i].rdev);
if (rdev && rdev->in_sync) {
atomic_inc(&rdev->nr_pending);
rcu_read_unlock();
@@ -139,7 +139,7 @@ static void unplug_slaves(mddev_t *mddev)
rcu_read_lock();
for (i=0; i<mddev->raid_disks; i++) {
- mdk_rdev_t *rdev = conf->multipaths[i].rdev;
+ mdk_rdev_t *rdev = rcu_dereference(conf->multipaths[i].rdev);
if (rdev && !rdev->faulty && atomic_read(&rdev->nr_pending)) {
request_queue_t *r_queue = bdev_get_queue(rdev->bdev);
@@ -224,7 +224,7 @@ static int multipath_issue_flush(request_queue_t *q, struct gendisk *disk,
rcu_read_lock();
for (i=0; i<mddev->raid_disks && ret == 0; i++) {
- mdk_rdev_t *rdev = conf->multipaths[i].rdev;
+ mdk_rdev_t *rdev = rcu_dereference(conf->multipaths[i].rdev);
if (rdev && !rdev->faulty) {
struct block_device *bdev = rdev->bdev;
request_queue_t *r_queue = bdev_get_queue(bdev);
@@ -331,7 +331,7 @@ static int multipath_add_disk(mddev_t *mddev, mdk_rdev_t *rdev)
conf->working_disks++;
rdev->raid_disk = path;
rdev->in_sync = 1;
- p->rdev = rdev;
+ rcu_assign_pointer(p->rdev, rdev);
found = 1;
}