Btrfs: remove deprecated comments

commit d53ba47484ed6245e640ee4bfe9d21e9bfc15765
(Btrfs: use commit root when loading free space cache) has remove
the deadlock check, and the related comments can be removed as well.

Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>

diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index c642fc2cfc2b104bf4e2f8117b006d60acedc338..a4a062a0a79c66ce3e207d2710c96e53cbbaa921 100644 (file)
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -527,12 +527,6 @@ static int cache_block_group(struct btrfs_block_group_cache *cache,
        cache->cached = BTRFS_CACHE_FAST;
        spin_unlock(&cache->lock);
 
-       /*
-        * We can't do the read from on-disk cache during a commit since we need
-        * to have the normal tree locking.  Also if we are currently trying to
-        * allocate blocks for the tree root we can't do the fast caching since
-        * we likely hold important locks.
-        */
        if (fs_info->mount_opt & BTRFS_MOUNT_SPACE_CACHE) {
                ret = load_free_space_cache(fs_info, cache);