Btrfs: Replace the big fs_mutex with a collection of other locks

Extent alloctions are still protected by a large alloc_mutex.
Objectid allocations are covered by a objectid mutex
Other btree operations are protected by a lock on individual btree nodes

Signed-off-by: Chris Mason <chris.mason@oracle.com>

1 files changed, 0 insertions, 2 deletions

diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index 196d0e280b19..b61ded7a20c9 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -366,12 +366,10 @@ int btrfs_sync_fs(struct super_block *sb, int wait)
                 return 0;
         }
         btrfs_clean_old_snapshots(root);
-        mutex_lock(&root->fs_info->fs_mutex);
         btrfs_defrag_dirty_roots(root->fs_info);
         trans = btrfs_start_transaction(root, 1);
         ret = btrfs_commit_transaction(trans, root);
         sb->s_dirt = 0;
-        mutex_unlock(&root->fs_info->fs_mutex);
         return ret;
 }