futex: Cleanup stale fshared flag interfaces

The fast GUP changes stopped using the fshared flag in
put_futex_keys(), but we kept the interface the same.

Cleanup all stale users.

This patch is split out from Darren Harts combo patch which also
combines various flags. This way the changes are clearly separated.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Darren Hart <dvhart@linux.intel.com>
LKML-Reference: <1289250609-16304-1-git-send-email-dvhart@linux.intel.com>

kernel/futex.c

@@ -283,8 +283,7 @@ again:
 	return 0;
 }
 
-static inline
-void put_futex_key(int fshared, union futex_key *key)
+static inline void put_futex_key(union futex_key *key)
 {
 	drop_futex_key_refs(key);
 }
@@ -907,7 +906,7 @@ static int futex_wake(u32 __user *uaddr, int fshared, int nr_wake, u32 bitset)
 	}
 
 	spin_unlock(&hb->lock);
-	put_futex_key(fshared, &key);
+	put_futex_key(&key);
 out:
 	return ret;
 }
@@ -965,8 +964,8 @@ retry_private:
 		if (!fshared)
 			goto retry_private;
 
-		put_futex_key(fshared, &key2);
-		put_futex_key(fshared, &key1);
+		put_futex_key(&key2);
+		put_futex_key(&key1);
 		goto retry;
 	}
 
@@ -996,9 +995,9 @@ retry_private:
 
 	double_unlock_hb(hb1, hb2);
 out_put_keys:
-	put_futex_key(fshared, &key2);
+	put_futex_key(&key2);
 out_put_key1:
-	put_futex_key(fshared, &key1);
+	put_futex_key(&key1);
 out:
 	return ret;
 }
@@ -1219,8 +1218,8 @@ retry_private:
 			if (!fshared)
 				goto retry_private;
 
-			put_futex_key(fshared, &key2);
-			put_futex_key(fshared, &key1);
+			put_futex_key(&key2);
+			put_futex_key(&key1);
 			goto retry;
 		}
 		if (curval != *cmpval) {
@@ -1260,8 +1259,8 @@ retry_private:
 			break;
 		case -EFAULT:
 			double_unlock_hb(hb1, hb2);
-			put_futex_key(fshared, &key2);
-			put_futex_key(fshared, &key1);
+			put_futex_key(&key2);
+			put_futex_key(&key1);
 			ret = fault_in_user_writeable(uaddr2);
 			if (!ret)
 				goto retry;
@@ -1269,8 +1268,8 @@ retry_private:
 		case -EAGAIN:
 			/* The owner was exiting, try again. */
 			double_unlock_hb(hb1, hb2);
-			put_futex_key(fshared, &key2);
-			put_futex_key(fshared, &key1);
+			put_futex_key(&key2);
+			put_futex_key(&key1);
 			cond_resched();
 			goto retry;
 		default:
@@ -1352,9 +1351,9 @@ out_unlock:
 		drop_futex_key_refs(&key1);
 
 out_put_keys:
-	put_futex_key(fshared, &key2);
+	put_futex_key(&key2);
 out_put_key1:
-	put_futex_key(fshared, &key1);
+	put_futex_key(&key1);
 out:
 	if (pi_state != NULL)
 		free_pi_state(pi_state);
@@ -1494,7 +1493,7 @@ static void unqueue_me_pi(struct futex_q *q)
  * private futexes.
  */
 static int fixup_pi_state_owner(u32 __user *uaddr, struct futex_q *q,
-				struct task_struct *newowner, int fshared)
+				struct task_struct *newowner)
 {
 	u32 newtid = task_pid_vnr(newowner) | FUTEX_WAITERS;
 	struct futex_pi_state *pi_state = q->pi_state;
@@ -1600,7 +1599,6 @@ static long futex_wait_restart(struct restart_block *restart);
 /**
  * fixup_owner() - Post lock pi_state and corner case management
  * @uaddr:	user address of the futex
- * @fshared:	whether the futex is shared (1) or not (0)
  * @q:		futex_q (contains pi_state and access to the rt_mutex)
  * @locked:	if the attempt to take the rt_mutex succeeded (1) or not (0)
  *
@@ -1613,8 +1611,7 @@ static long futex_wait_restart(struct restart_block *restart);
  *  0 - success, lock not taken
  * <0 - on error (-EFAULT)
  */
-static int fixup_owner(u32 __user *uaddr, int fshared, struct futex_q *q,
-		       int locked)
+static int fixup_owner(u32 __user *uaddr, struct futex_q *q, int locked)
 {
 	struct task_struct *owner;
 	int ret = 0;
@@ -1625,7 +1622,7 @@ static int fixup_owner(u32 __user *uaddr, int fshared, struct futex_q *q,
 		 * did a lock-steal - fix up the PI-state in that case:
 		 */
 		if (q->pi_state->owner != current)
-			ret = fixup_pi_state_owner(uaddr, q, current, fshared);
+			ret = fixup_pi_state_owner(uaddr, q, current);
 		goto out;
 	}
 
@@ -1652,7 +1649,7 @@ static int fixup_owner(u32 __user *uaddr, int fshared, struct futex_q *q,
 		 * lock. Fix the state up.
 		 */
 		owner = rt_mutex_owner(&q->pi_state->pi_mutex);
-		ret = fixup_pi_state_owner(uaddr, q, owner, fshared);
+		ret = fixup_pi_state_owner(uaddr, q, owner);
 		goto out;
 	}
 
@@ -1772,7 +1769,7 @@ retry_private:
 		if (!fshared)
 			goto retry_private;
 
-		put_futex_key(fshared, &q->key);
+		put_futex_key(&q->key);
 		goto retry;
 	}
 
@@ -1783,7 +1780,7 @@ retry_private:
 
 out:
 	if (ret)
-		put_futex_key(fshared, &q->key);
+		put_futex_key(&q->key);
 	return ret;
 }
 
@@ -1941,7 +1938,7 @@ retry_private:
 			 * exit to complete.
 			 */
 			queue_unlock(&q, hb);
-			put_futex_key(fshared, &q.key);
+			put_futex_key(&q.key);
 			cond_resched();
 			goto retry;
 		default:
@@ -1971,7 +1968,7 @@ retry_private:
 	 * Fixup the pi_state owner and possibly acquire the lock if we
 	 * haven't already.
 	 */
-	res = fixup_owner(uaddr, fshared, &q, !ret);
+	res = fixup_owner(uaddr, &q, !ret);
 	/*
 	 * If fixup_owner() returned an error, proprogate that.  If it acquired
 	 * the lock, clear our -ETIMEDOUT or -EINTR.
@@ -1995,7 +1992,7 @@ out_unlock_put_key:
 	queue_unlock(&q, hb);
 
 out_put_key:
-	put_futex_key(fshared, &q.key);
+	put_futex_key(&q.key);
 out:
 	if (to)
 		destroy_hrtimer_on_stack(&to->timer);
@@ -2011,7 +2008,7 @@ uaddr_faulted:
 	if (!fshared)
 		goto retry_private;
 
-	put_futex_key(fshared, &q.key);
+	put_futex_key(&q.key);
 	goto retry;
 }
 
@@ -2093,14 +2090,14 @@ retry:
 
 out_unlock:
 	spin_unlock(&hb->lock);
-	put_futex_key(fshared, &key);
+	put_futex_key(&key);
 
 out:
 	return ret;
 
 pi_faulted:
 	spin_unlock(&hb->lock);
-	put_futex_key(fshared, &key);
+	put_futex_key(&key);
 
 	ret = fault_in_user_writeable(uaddr);
 	if (!ret)
@@ -2273,8 +2270,7 @@ static int futex_wait_requeue_pi(u32 __user *uaddr, int fshared,
 		 */
 		if (q.pi_state && (q.pi_state->owner != current)) {
 			spin_lock(q.lock_ptr);
-			ret = fixup_pi_state_owner(uaddr2, &q, current,
-						   fshared);
+			ret = fixup_pi_state_owner(uaddr2, &q, current);
 			spin_unlock(q.lock_ptr);
 		}
 	} else {
@@ -2293,7 +2289,7 @@ static int futex_wait_requeue_pi(u32 __user *uaddr, int fshared,
 		 * Fixup the pi_state owner and possibly acquire the lock if we
 		 * haven't already.
 		 */
-		res = fixup_owner(uaddr2, fshared, &q, !ret);
+		res = fixup_owner(uaddr2, &q, !ret);
 		/*
 		 * If fixup_owner() returned an error, proprogate that.  If it
 		 * acquired the lock, clear -ETIMEDOUT or -EINTR.
@@ -2324,9 +2320,9 @@ static int futex_wait_requeue_pi(u32 __user *uaddr, int fshared,
 	}
 
 out_put_keys:
-	put_futex_key(fshared, &q.key);
+	put_futex_key(&q.key);
 out_key2:
-	put_futex_key(fshared, &key2);
+	put_futex_key(&key2);
 
 out:
 	if (to) {