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authorZefan Li <lizefan@huawei.com>2014-09-18 12:03:15 +0400
committerTejun Heo <tj@kernel.org>2014-09-18 21:27:23 +0400
commit006f4ac49742b5f70ef7e39176fd42a500144ccc (patch)
tree976006e7b7a5a0df635538fe51348e4648d9df8c /fs/proc/base.c
parent971ff49355387fef41d1327434d8939721a4eb35 (diff)
downloadlinux-006f4ac49742b5f70ef7e39176fd42a500144ccc.tar.xz
cgroup: simplify proc_cgroup_show()
Use the ONE macro instead of REG, and we can simplify proc_cgroup_show(). Signed-off-by: Zefan Li <lizefan@huawei.com> Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'fs/proc/base.c')
-rw-r--r--fs/proc/base.c19
1 files changed, 2 insertions, 17 deletions
diff --git a/fs/proc/base.c b/fs/proc/base.c
index baf852b648ad..6b96892015ec 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -376,21 +376,6 @@ static const struct file_operations proc_lstats_operations = {
#endif
-#ifdef CONFIG_CGROUPS
-static int cgroup_open(struct inode *inode, struct file *file)
-{
- struct pid *pid = PROC_I(inode)->pid;
- return single_open(file, proc_cgroup_show, pid);
-}
-
-static const struct file_operations proc_cgroup_operations = {
- .open = cgroup_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
-};
-#endif
-
#ifdef CONFIG_PROC_PID_CPUSET
static int cpuset_open(struct inode *inode, struct file *file)
@@ -2576,7 +2561,7 @@ static const struct pid_entry tgid_base_stuff[] = {
REG("cpuset", S_IRUGO, proc_cpuset_operations),
#endif
#ifdef CONFIG_CGROUPS
- REG("cgroup", S_IRUGO, proc_cgroup_operations),
+ ONE("cgroup", S_IRUGO, proc_cgroup_show),
#endif
ONE("oom_score", S_IRUGO, proc_oom_score),
REG("oom_adj", S_IRUGO|S_IWUSR, proc_oom_adj_operations),
@@ -2922,7 +2907,7 @@ static const struct pid_entry tid_base_stuff[] = {
REG("cpuset", S_IRUGO, proc_cpuset_operations),
#endif
#ifdef CONFIG_CGROUPS
- REG("cgroup", S_IRUGO, proc_cgroup_operations),
+ ONE("cgroup", S_IRUGO, proc_cgroup_show),
#endif
ONE("oom_score", S_IRUGO, proc_oom_score),
REG("oom_adj", S_IRUGO|S_IWUSR, proc_oom_adj_operations),