fs: dcache remove dcache_lock

dcache_lock no longer protects anything. remove it.

Signed-off-by: Nick Piggin <npiggin@kernel.dk>

1 files changed, 0 insertions, 6 deletions

diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index 7b4705b51d4a..1864cb6a6a59 100644
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -876,7 +876,6 @@ static void cgroup_clear_directory(struct dentry *dentry)
         struct list_head *node;
 
         BUG_ON(!mutex_is_locked(&dentry->d_inode->i_mutex));
-        spin_lock(&dcache_lock);
         spin_lock(&dentry->d_lock);
         node = dentry->d_subdirs.next;
         while (node != &dentry->d_subdirs) {
@@ -891,18 +890,15 @@ static void cgroup_clear_directory(struct dentry *dentry)
                         dget_locked_dlock(d);
                         spin_unlock(&d->d_lock);
                         spin_unlock(&dentry->d_lock);
-                        spin_unlock(&dcache_lock);
                         d_delete(d);
                         simple_unlink(dentry->d_inode, d);
                         dput(d);
-                        spin_lock(&dcache_lock);
                         spin_lock(&dentry->d_lock);
                 } else
                         spin_unlock(&d->d_lock);
                 node = dentry->d_subdirs.next;
         }
         spin_unlock(&dentry->d_lock);
-        spin_unlock(&dcache_lock);
 }
 
 /*
@@ -914,14 +910,12 @@ static void cgroup_d_remove_dir(struct dentry *dentry)
 
         cgroup_clear_directory(dentry);
 
-        spin_lock(&dcache_lock);
         parent = dentry->d_parent;
         spin_lock(&parent->d_lock);
         spin_lock(&dentry->d_lock);
         list_del_init(&dentry->d_u.d_child);
         spin_unlock(&dentry->d_lock);
         spin_unlock(&parent->d_lock);
-        spin_unlock(&dcache_lock);
         remove_dir(dentry);
 }