cpuset: simplify proc_cpuset_show()

Use the ONE macro instead of REG, and we can simplify proc_cpuset_show().

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

1 files changed, 2 insertions, 18 deletions

diff --git a/fs/proc/base.c b/fs/proc/base.c
index 6b96892015ec..4e8aa35fc3eb 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -376,22 +376,6 @@ static const struct file_operations proc_lstats_operations = {
 
 #endif
 
-#ifdef CONFIG_PROC_PID_CPUSET
-
-static int cpuset_open(struct inode *inode, struct file *file)
-{
-        struct pid *pid = PROC_I(inode)->pid;
-        return single_open(file, proc_cpuset_show, pid);
-}
-
-static const struct file_operations proc_cpuset_operations = {
-        .open           = cpuset_open,
-        .read           = seq_read,
-        .llseek         = seq_lseek,
-        .release        = single_release,
-};
-#endif
-
 static int proc_oom_score(struct seq_file *m, struct pid_namespace *ns,
                           struct pid *pid, struct task_struct *task)
 {
@@ -2558,7 +2542,7 @@ static const struct pid_entry tgid_base_stuff[] = {
         REG("latency",  S_IRUGO, proc_lstats_operations),
 #endif
 #ifdef CONFIG_PROC_PID_CPUSET
-        REG("cpuset",     S_IRUGO, proc_cpuset_operations),
+        ONE("cpuset",     S_IRUGO, proc_cpuset_show),
 #endif
 #ifdef CONFIG_CGROUPS
         ONE("cgroup",  S_IRUGO, proc_cgroup_show),
@@ -2904,7 +2888,7 @@ static const struct pid_entry tid_base_stuff[] = {
         REG("latency",  S_IRUGO, proc_lstats_operations),
 #endif
 #ifdef CONFIG_PROC_PID_CPUSET
-        REG("cpuset",    S_IRUGO, proc_cpuset_operations),
+        ONE("cpuset",    S_IRUGO, proc_cpuset_show),
 #endif
 #ifdef CONFIG_CGROUPS
         ONE("cgroup",  S_IRUGO, proc_cgroup_show),