TOMOYO: Remove redundant tasklist_lock.
rcu_read_lock() is sufficient for calling find_task_by_pid_ns()/find_task_by_vpid().
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: James Morris <jmorris@namei.org>
diff --git a/security/tomoyo/common.c b/security/tomoyo/common.c
index 2e28020..365f3bd 100644
--- a/security/tomoyo/common.c
+++ b/security/tomoyo/common.c
@@ -984,14 +984,12 @@
(global_pid = true, sscanf(data, "global-pid=%u", &pid) == 1)) {
struct task_struct *p;
rcu_read_lock();
- read_lock(&tasklist_lock);
if (global_pid)
p = find_task_by_pid_ns(pid, &init_pid_ns);
else
p = find_task_by_vpid(pid);
if (p)
domain = tomoyo_real_domain(p);
- read_unlock(&tasklist_lock);
rcu_read_unlock();
} else if (!strncmp(data, "domain=", 7)) {
if (tomoyo_domain_def(data + 7))
@@ -1664,14 +1662,12 @@
global_pid = true;
pid = (unsigned int) simple_strtoul(buf, NULL, 10);
rcu_read_lock();
- read_lock(&tasklist_lock);
if (global_pid)
p = find_task_by_pid_ns(pid, &init_pid_ns);
else
p = find_task_by_vpid(pid);
if (p)
domain = tomoyo_real_domain(p);
- read_unlock(&tasklist_lock);
rcu_read_unlock();
if (!domain)
return;