4 files changed, 1 insertions, 16 deletions

diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 527744561f93..aaa049b8e134 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -728,7 +728,6 @@ struct btrfs_fs_info {
         struct mutex tree_log_mutex;
         struct mutex transaction_kthread_mutex;
         struct mutex cleaner_mutex;
-        struct mutex pinned_mutex;
         struct mutex chunk_mutex;
         struct mutex drop_mutex;
         struct mutex volume_mutex;
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 1747dfd18654..ea59ebfa505d 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -1647,7 +1647,6 @@ struct btrfs_root *open_ctree(struct super_block *sb,
         mutex_init(&fs_info->ordered_operations_mutex);
         mutex_init(&fs_info->tree_log_mutex);
         mutex_init(&fs_info->drop_mutex);
-        mutex_init(&fs_info->pinned_mutex);
         mutex_init(&fs_info->chunk_mutex);
         mutex_init(&fs_info->transaction_kthread_mutex);
         mutex_init(&fs_info->cleaner_mutex);
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 6880a271975a..15d62a9214b7 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -166,7 +166,6 @@ static int add_new_free_space(struct btrfs_block_group_cache *block_group,
         u64 extent_start, extent_end, size;
         int ret;
 
-        mutex_lock(&info->pinned_mutex);
         while (start < end) {
                 ret = find_first_extent_bit(&info->pinned_extents, start,
                                             &extent_start, &extent_end,
@@ -192,7 +191,6 @@ static int add_new_free_space(struct btrfs_block_group_cache *block_group,
                 ret = btrfs_add_free_space(block_group, start, size);
                 BUG_ON(ret);
         }
-        mutex_unlock(&info->pinned_mutex);
 
         return 0;
 }
@@ -2047,7 +2045,6 @@ int btrfs_update_pinned_extents(struct btrfs_root *root,
         struct btrfs_block_group_cache *cache;
         struct btrfs_fs_info *fs_info = root->fs_info;
 
-        WARN_ON(!mutex_is_locked(&root->fs_info->pinned_mutex));
         if (pin) {
                 set_extent_dirty(&fs_info->pinned_extents,
                                 bytenr, bytenr + num - 1, GFP_NOFS);
@@ -2055,7 +2052,6 @@ int btrfs_update_pinned_extents(struct btrfs_root *root,
                 clear_extent_dirty(&fs_info->pinned_extents,
                                 bytenr, bytenr + num - 1, GFP_NOFS);
         }
-        mutex_unlock(&root->fs_info->pinned_mutex);
 
         while (num > 0) {
                 cache = btrfs_lookup_block_group(fs_info, bytenr);
@@ -2127,7 +2123,6 @@ int btrfs_copy_pinned(struct btrfs_root *root, struct extent_io_tree *copy)
         struct extent_io_tree *pinned_extents = &root->fs_info->pinned_extents;
         int ret;
 
-        mutex_lock(&root->fs_info->pinned_mutex);
         while (1) {
                 ret = find_first_extent_bit(pinned_extents, last,
                                             &start, &end, EXTENT_DIRTY);
@@ -2136,7 +2131,6 @@ int btrfs_copy_pinned(struct btrfs_root *root, struct extent_io_tree *copy)
                 set_extent_dirty(copy, start, end, GFP_NOFS);
                 last = end + 1;
         }
-        mutex_unlock(&root->fs_info->pinned_mutex);
         return 0;
 }
 
@@ -2149,7 +2143,6 @@ int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
         int ret;
 
         while (1) {
-                mutex_lock(&root->fs_info->pinned_mutex);
                 ret = find_first_extent_bit(unpin, 0, &start, &end,
                                             EXTENT_DIRTY);
                 if (ret)
@@ -2163,7 +2156,6 @@ int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
 
                 cond_resched();
         }
-        mutex_unlock(&root->fs_info->pinned_mutex);
         return ret;
 }
 
@@ -2205,7 +2197,6 @@ static int pin_down_bytes(struct btrfs_trans_handle *trans,
         free_extent_buffer(buf);
 pinit:
         btrfs_set_path_blocking(path);
-        mutex_lock(&root->fs_info->pinned_mutex);
         /* unlocks the pinned mutex */
         btrfs_update_pinned_extents(root, bytenr, num_bytes, 1);
 
@@ -2511,8 +2502,6 @@ int btrfs_free_extent(struct btrfs_trans_handle *trans,
          */
         if (root->root_key.objectid == BTRFS_TREE_LOG_OBJECTID &&
             owner_objectid < BTRFS_FIRST_FREE_OBJECTID) {
-                mutex_lock(&root->fs_info->pinned_mutex);
-
                 /* unlocks the pinned mutex */
                 btrfs_update_pinned_extents(root, bytenr, num_bytes, 1);
                 update_reserved_extents(root, bytenr, num_bytes, 0);
diff --git a/fs/btrfs/tree-log.c b/fs/btrfs/tree-log.c
index fc9b87a7975b..2871609641f5 100644
--- a/fs/btrfs/tree-log.c
+++ b/fs/btrfs/tree-log.c
@@ -262,11 +262,9 @@ static int process_one_buffer(struct btrfs_root *log,
                               struct extent_buffer *eb,
                               struct walk_control *wc, u64 gen)
 {
-        if (wc->pin) {
-                mutex_lock(&log->fs_info->pinned_mutex);
+        if (wc->pin)
                 btrfs_update_pinned_extents(log->fs_info->extent_root,
                                             eb->start, eb->len, 1);
-        }
 
         if (btrfs_buffer_uptodate(eb, gen)) {
                 if (wc->write)