Merge branch 'timers-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

* 'timers-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  posix-cpu-timers: Rcu_read_lock/unlock protect find_task_by_vpid call

1 files changed, 6 insertions, 6 deletions

diff --git a/kernel/posix-cpu-timers.c b/kernel/posix-cpu-timers.c
index 6842eeba5879..05bb7173850e 100644
--- a/kernel/posix-cpu-timers.c
+++ b/kernel/posix-cpu-timers.c
@@ -37,13 +37,13 @@ static int check_clock(const clockid_t which_clock)
         if (pid == 0)
                 return 0;
 
-        read_lock(&tasklist_lock);
+        rcu_read_lock();
         p = find_task_by_vpid(pid);
         if (!p || !(CPUCLOCK_PERTHREAD(which_clock) ?
-                   same_thread_group(p, current) : thread_group_leader(p))) {
+                   same_thread_group(p, current) : has_group_leader_pid(p))) {
                 error = -EINVAL;
         }
-        read_unlock(&tasklist_lock);
+        rcu_read_unlock();
 
         return error;
 }
@@ -390,7 +390,7 @@ int posix_cpu_timer_create(struct k_itimer *new_timer)
 
         INIT_LIST_HEAD(&new_timer->it.cpu.entry);
 
-        read_lock(&tasklist_lock);
+        rcu_read_lock();
         if (CPUCLOCK_PERTHREAD(new_timer->it_clock)) {
                 if (pid == 0) {
                         p = current;
@@ -404,7 +404,7 @@ int posix_cpu_timer_create(struct k_itimer *new_timer)
                         p = current->group_leader;
                 } else {
                         p = find_task_by_vpid(pid);
-                        if (p && !thread_group_leader(p))
+                        if (p && !has_group_leader_pid(p))
                                 p = NULL;
                 }
         }
@@ -414,7 +414,7 @@ int posix_cpu_timer_create(struct k_itimer *new_timer)
         } else {
                 ret = -EINVAL;
         }
-        read_unlock(&tasklist_lock);
+        rcu_read_unlock();
 
         return ret;
 }