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authorOleg Nesterov <oleg@tv-sign.ru>2008-02-08 13:19:15 +0100
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2008-02-08 18:22:28 +0100
commitac9a8e3f0f43d20fc316162e8e5f9186d295ff49 (patch)
treea6b8d416c38d222773a46c5d84b3d043facbf008
parentpid: Extend/Fix pid_vnr (diff)
downloadlinux-ac9a8e3f0f43d20fc316162e8e5f9186d295ff49.tar.xz
linux-ac9a8e3f0f43d20fc316162e8e5f9186d295ff49.zip
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>
-rw-r--r--kernel/sys.c11
1 files changed, 4 insertions, 7 deletions
diff --git a/kernel/sys.c b/kernel/sys.c
index ee2e78dbea6c..5a61f8071b8e 100644
--- a/kernel/sys.c
+++ b/kernel/sys.c
@@ -1025,19 +1025,16 @@ asmlinkage long sys_getsid(pid_t pid)
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;
}
}