cgroup: remove cftype->release()

Now that pidlist files don't use cftype->release(), it doesn't have
any user left.  Remove it.

Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Li Zefan <lizefan@huawei.com>

diff --git a/include/linux/cgroup.h b/include/linux/cgroup.h
index 492fa01..5207c28 100644 (file)
--- a/include/linux/cgroup.h
+++ b/include/linux/cgroup.h
@@ -499,8 +499,6 @@ struct cftype {
         * kick type for multiplexing.
         */
        int (*trigger)(struct cgroup_subsys_state *css, unsigned int event);
-
-       int (*release)(struct inode *inode, struct file *file);
 };
 
 /*

diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index 1e09ded..b59e345 100644 (file)
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -2448,12 +2448,9 @@ static int cgroup_file_open(struct inode *inode, struct file *file)
 static int cgroup_file_release(struct inode *inode, struct file *file)
 {
        struct cfent *cfe = __d_cfe(file->f_dentry);
-       struct cftype *cft = __d_cft(file->f_dentry);
        struct cgroup_subsys_state *css = cfe->css;
        int ret = 0;
 
-       if (cft->release)
-               ret = cft->release(inode, file);
        if (css->ss)
                css_put(css);
        if (file->f_op == &cgroup_seqfile_operations)