xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

cgroup: simplify proc_cgroup_show()

Browse Source 
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>
This commit is contained in:
Zefan Li
2014-09-18 16:03:15 +08:00
committed by Tejun Heo
parent 971ff49355
commit 006f4ac497
3 changed files with 7 additions and 33 deletions
Download Patch File Download Diff File Expand all files Collapse all files

18
kernel/cgroup.c
View File

@@ -5030,12 +5030,9 @@ core_initcall(cgroup_wq_init);
* - Print task's cgroup paths into seq_file, one line for each hierarchy
* - Used for /proc/<pid>/cgroup.
*/
/* TODO: Use a proper seq_file iterator */
int proc_cgroup_show(struct seq_file *m, void *v)
int proc_cgroup_show(struct seq_file *m, struct pid_namespace *ns,
struct pid *pid, struct task_struct *tsk)
{
struct pid *pid;
struct task_struct *tsk;
char *buf, *path;
int retval;
struct cgroup_root *root;
@@ -5045,14 +5042,6 @@ int proc_cgroup_show(struct seq_file *m, void *v)
if (!buf)
goto out;
retval = -ESRCH;
pid = m->private;
tsk = get_pid_task(pid, PIDTYPE_PID);
if (!tsk)
goto out_free;
retval = 0;
mutex_lock(&cgroup_mutex);
down_read(&css_set_rwsem);
@@ -5082,11 +5071,10 @@ int proc_cgroup_show(struct seq_file *m, void *v)
seq_putc(m, '\n');
}
retval = 0;
out_unlock:
up_read(&css_set_rwsem);
mutex_unlock(&cgroup_mutex);
put_task_struct(tsk);
out_free:
kfree(buf);
out:
return retval;