Btrfs: Various small fixes.
This trivial patch contains two locking fixes and a off by one fix.
---
Signed-off-by: Chris Mason <chris.mason@oracle.com>
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index a6a418b..eb4b357 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -449,7 +449,9 @@
s->s_flags |= MS_ACTIVE;
}
+ mutex_lock(&s->s_root->d_inode->i_mutex);
root = lookup_one_len(subvol_name, s->s_root, strlen(subvol_name));
+ mutex_unlock(&s->s_root->d_inode->i_mutex);
if (IS_ERR(root)) {
up_write(&s->s_umount);
deactivate_super(s);