1 files changed, 11 insertions, 73 deletions

diff --git a/kernel/futex.c b/kernel/futex.c
index b9b8aea..9d260e8 100644
--- a/kernel/futex.c
+++ b/kernel/futex.c
@@ -1120,9 +1120,10 @@ static int futex_wait(u32 __user *uaddr, u32 val, unsigned long time)
  * if there are waiters then it will block, it does PI, etc. (Due to
  * races the kernel might see a 0 value of the futex too.)
  */
-static int do_futex_lock_pi(u32 __user *uaddr, int detect, int trylock,
-			    struct hrtimer_sleeper *to)
+static int futex_lock_pi(u32 __user *uaddr, int detect, unsigned long sec,
+			 long nsec, int trylock)
 {
+	struct hrtimer_sleeper timeout, *to = NULL;
 	struct task_struct *curr = current;
 	struct futex_hash_bucket *hb;
 	u32 uval, newval, curval;
@@ -1132,6 +1133,13 @@ static int do_futex_lock_pi(u32 __user *uaddr, int detect, int trylock,
 	if (refill_pi_state_cache())
 		return -ENOMEM;
 
+	if (sec != MAX_SCHEDULE_TIMEOUT) {
+		to = &timeout;
+		hrtimer_init(&to->timer, CLOCK_REALTIME, HRTIMER_ABS);
+		hrtimer_init_sleeper(to, current);
+		to->timer.expires = ktime_set(sec, nsec);
+	}
+
 	q.pi_state = NULL;
  retry:
 	down_read(&curr->mm->mmap_sem);
@@ -1307,7 +1315,7 @@ static int do_futex_lock_pi(u32 __user *uaddr, int detect, int trylock,
 	if (!detect && ret == -EDEADLK && 0)
 		force_sig(SIGKILL, current);
 
-	return ret;
+	return ret != -EINTR ? ret : -ERESTARTNOINTR;
 
  out_unlock_release_sem:
 	queue_unlock(&q, hb);
@@ -1342,76 +1350,6 @@ static int do_futex_lock_pi(u32 __user *uaddr, int detect, int trylock,
 }
 
 /*
- * Restart handler
- */
-static long futex_lock_pi_restart(struct restart_block *restart)
-{
-	struct hrtimer_sleeper timeout, *to = NULL;
-	int ret;
-
-	restart->fn = do_no_restart_syscall;
-
-	if (restart->arg2 || restart->arg3) {
-		to = &timeout;
-		hrtimer_init(&to->timer, CLOCK_REALTIME, HRTIMER_ABS);
-		hrtimer_init_sleeper(to, current);
-		to->timer.expires.tv64 = ((u64)restart->arg1 << 32) |
-			(u64) restart->arg0;
-	}
-
-	pr_debug("lock_pi restart: %p, %d (%d)\n",
-		 (u32 __user *)restart->arg0, current->pid);
-
-	ret = do_futex_lock_pi((u32 __user *)restart->arg0, restart->arg1,
-			       0, to);
-
-	if (ret != -EINTR)
-		return ret;
-
-	restart->fn = futex_lock_pi_restart;
-
-	/* The other values are filled in */
-	return -ERESTART_RESTARTBLOCK;
-}
-
-/*
- * Called from the syscall entry below.
- */
-static int futex_lock_pi(u32 __user *uaddr, int detect, unsigned long sec,
-			 long nsec, int trylock)
-{
-	struct hrtimer_sleeper timeout, *to = NULL;
-	struct restart_block *restart;
-	int ret;
-
-	if (sec != MAX_SCHEDULE_TIMEOUT) {
-		to = &timeout;
-		hrtimer_init(&to->timer, CLOCK_REALTIME, HRTIMER_ABS);
-		hrtimer_init_sleeper(to, current);
-		to->timer.expires = ktime_set(sec, nsec);
-	}
-
-	ret = do_futex_lock_pi(uaddr, detect, trylock, to);
-
-	if (ret != -EINTR)
-		return ret;
-
-	pr_debug("lock_pi interrupted: %p, %d (%d)\n", uaddr, current->pid);
-
-	restart = &current_thread_info()->restart_block;
-	restart->fn = futex_lock_pi_restart;
-	restart->arg0 = (unsigned long) uaddr;
-	restart->arg1 = detect;
-	if (to) {
-		restart->arg2 = to->timer.expires.tv64 & 0xFFFFFFFF;
-		restart->arg3 = to->timer.expires.tv64 >> 32;
-	} else
-		restart->arg2 = restart->arg3 = 0;
-
-	return -ERESTART_RESTARTBLOCK;
-}
-
-/*
  * Userspace attempted a TID -> 0 atomic transition, and failed.
  * This is the in-kernel slowpath: we look up the PI state (if any),
  * and do the rt-mutex unlock.