From: Andi Kleen <a...@linux.intel.com>

240f62c8756 replaced the node_lock with rcu_read_lock, but forgot
to remove the actual lock in the data structure. Remove it here.

Signed-off-by: Andi Kleen <a...@linux.intel.com>
---
 fs/btrfs/ctree.h   |    3 ---
 fs/btrfs/disk-io.c |    1 -
 2 files changed, 0 insertions(+), 4 deletions(-)

diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 8f4b81d..f290b98 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -1088,9 +1088,6 @@ struct btrfs_fs_info {
 struct btrfs_root {
        struct extent_buffer *node;
 
-       /* the node lock is held while changing the node pointer */
-       spinlock_t node_lock;
-
        struct extent_buffer *commit_root;
        struct btrfs_root *log_root;
        struct btrfs_root *reloc_root;
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 228cf36..64b2896 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -1064,7 +1064,6 @@ static int __setup_root(u32 nodesize, u32 leafsize, u32 
sectorsize,
        INIT_LIST_HEAD(&root->dirty_list);
        INIT_LIST_HEAD(&root->orphan_list);
        INIT_LIST_HEAD(&root->root_list);
-       spin_lock_init(&root->node_lock);
        spin_lock_init(&root->orphan_lock);
        spin_lock_init(&root->inode_lock);
        spin_lock_init(&root->accounting_lock);
-- 
1.7.4.4

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