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>

1 files changed, 0 insertions, 6 deletions

diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index c642fc2cfc2b..a4a062a0a79c 100644
--- 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);