ipc/sem.c: handle spurious wakeups

[pandora-kernel.git] / ipc / sem.c

diff --git a/ipc/sem.c b/ipc/sem.c
index fb13be1..227948f 100644 (file)
--- a/ipc/sem.c
+++ b/ipc/sem.c
@@ -1426,6 +1426,8 @@ SYSCALL_DEFINE4(semtimedop, int, semid, struct sembuf __user *, tsops,
 
        queue.status = -EINTR;
        queue.sleeper = current;
+
+sleep_again:
        current->state = TASK_INTERRUPTIBLE;
        sem_unlock(sma);
 
@@ -1478,6 +1480,13 @@ SYSCALL_DEFINE4(semtimedop, int, semid, struct sembuf __user *, tsops,
         */
        if (timeout && jiffies_left == 0)
                error = -EAGAIN;
+
+       /*
+        * If the wakeup was spurious, just retry
+        */
+       if (error == -EINTR && !signal_pending(current))
+               goto sleep_again;
+
        unlink_queue(sma, &queue);
 
 out_unlock_free: