sys_getsid: don't use ->nsproxy directly
With the new semantics of find_vpid() we don't need to play with ->nsproxy
explicitely, _vxx() do the right things.
Also s/tasklist/rcu/.
Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/kernel/sys.c b/kernel/sys.c
index ee2e78d..5a61f80 100644
--- a/kernel/sys.c
+++ b/kernel/sys.c
@@ -1025,19 +1025,16 @@
else {
int retval;
struct task_struct *p;
- struct pid_namespace *ns;
- ns = current->nsproxy->pid_ns;
-
- read_lock(&tasklist_lock);
- p = find_task_by_pid_ns(pid, ns);
+ rcu_read_lock();
+ p = find_task_by_vpid(pid);
retval = -ESRCH;
if (p) {
retval = security_task_getsid(p);
if (!retval)
- retval = task_session_nr_ns(p, ns);
+ retval = task_session_vnr(p);
}
- read_unlock(&tasklist_lock);
+ rcu_read_unlock();
return retval;
}
}