1 files changed, 2 insertions, 2 deletions

diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index b2588a552658..98b6a71decba 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -2310,7 +2310,7 @@ int write_all_supers(struct btrfs_root *root, int max_mirrors)
         sb = &root->fs_info->super_for_commit;
         dev_item = &sb->dev_item;
 
-        rcu_read_lock();
+        mutex_lock(&root->fs_info->fs_devices->device_list_mutex);
         head = &root->fs_info->fs_devices->devices;
         list_for_each_entry_rcu(dev, head, dev_list) {
                 if (!dev->bdev) {
@@ -2355,7 +2355,7 @@ int write_all_supers(struct btrfs_root *root, int max_mirrors)
                 if (ret)
                         total_errors++;
         }
-        rcu_read_unlock();
+        mutex_unlock(&root->fs_info->fs_devices->device_list_mutex);
         if (total_errors > max_errors) {
                 printk(KERN_ERR "btrfs: %d errors while writing supers\n",
                        total_errors);