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| author | Zefan Li <lizefan@huawei.com> | 2014-09-18 16:03:15 +0800 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2014-09-18 13:27:23 -0400 |
| commit | 006f4ac49742b5f70ef7e39176fd42a500144ccc (patch) | |
| tree | 976006e7b7a5a0df635538fe51348e4648d9df8c /kernel/cgroup.c | |
| parent | 971ff49355387fef41d1327434d8939721a4eb35 (diff) | |
| download | linux-006f4ac49742b5f70ef7e39176fd42a500144ccc.tar.gz linux-006f4ac49742b5f70ef7e39176fd42a500144ccc.tar.bz2 linux-006f4ac49742b5f70ef7e39176fd42a500144ccc.zip | |
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 'kernel/cgroup.c')
| -rw-r--r-- | kernel/cgroup.c | 18 |
1 files changed, 3 insertions, 15 deletions
diff --git a/kernel/cgroup.c b/kernel/cgroup.c index db19a4884a7f..df7733b48d2e 100644 --- a/kernel/cgroup.c +++ b/kernel/cgroup.c @@ -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; |