Merge branch 'master' of /home/trondmy/kernel/linux-2.6/ into merge_linus

1 files changed, 25 insertions, 20 deletions

diff --git a/kernel/futex.c b/kernel/futex.c
index 93ef30ba209f..95989a3b4168 100644
--- a/kernel/futex.c
+++ b/kernel/futex.c
@@ -282,9 +282,9 @@ static inline int get_futex_value_locked(u32 *dest, u32 __user *from)
 {
 	int ret;
 
-	inc_preempt_count();
+	pagefault_disable();
 	ret = __copy_from_user_inatomic(dest, from, sizeof(u32));
-	dec_preempt_count();
+	pagefault_enable();
 
 	return ret ? -EFAULT : 0;
 }
@@ -324,12 +324,11 @@ static int refill_pi_state_cache(void)
 	if (likely(current->pi_state_cache))
 		return 0;
 
-	pi_state = kmalloc(sizeof(*pi_state), GFP_KERNEL);
+	pi_state = kzalloc(sizeof(*pi_state), GFP_KERNEL);
 
 	if (!pi_state)
 		return -ENOMEM;
 
-	memset(pi_state, 0, sizeof(*pi_state));
 	INIT_LIST_HEAD(&pi_state->list);
 	/* pi_mutex gets initialized later */
 	pi_state->owner = NULL;
@@ -553,7 +552,7 @@ static void wake_futex(struct futex_q *q)
 	 * at the end of wake_up_all() does not prevent this store from
 	 * moving.
 	 */
-	wmb();
+	smp_wmb();
 	q->lock_ptr = NULL;
 }
 
@@ -585,9 +584,9 @@ static int wake_futex_pi(u32 __user *uaddr, u32 uval, struct futex_q *this)
 	if (!(uval & FUTEX_OWNER_DIED)) {
 		newval = FUTEX_WAITERS | new_owner->pid;
 
-		inc_preempt_count();
+		pagefault_disable();
 		curval = futex_atomic_cmpxchg_inatomic(uaddr, uval, newval);
-		dec_preempt_count();
+		pagefault_enable();
 		if (curval == -EFAULT)
 			return -EFAULT;
 		if (curval != uval)
@@ -618,9 +617,9 @@ static int unlock_futex_pi(u32 __user *uaddr, u32 uval)
 	 * There is no waiter, so we unlock the futex. The owner died
 	 * bit has not to be preserved here. We are the owner:
 	 */
-	inc_preempt_count();
+	pagefault_disable();
 	oldval = futex_atomic_cmpxchg_inatomic(uaddr, uval, 0);
-	dec_preempt_count();
+	pagefault_enable();
 
 	if (oldval == -EFAULT)
 		return oldval;
@@ -1158,9 +1157,9 @@ static int futex_lock_pi(u32 __user *uaddr, int detect, unsigned long sec,
 	 */
 	newval = current->pid;
 
-	inc_preempt_count();
+	pagefault_disable();
 	curval = futex_atomic_cmpxchg_inatomic(uaddr, 0, newval);
-	dec_preempt_count();
+	pagefault_enable();
 
 	if (unlikely(curval == -EFAULT))
 		goto uaddr_faulted;
@@ -1183,9 +1182,9 @@ static int futex_lock_pi(u32 __user *uaddr, int detect, unsigned long sec,
 	uval = curval;
 	newval = uval | FUTEX_WAITERS;
 
-	inc_preempt_count();
+	pagefault_disable();
 	curval = futex_atomic_cmpxchg_inatomic(uaddr, uval, newval);
-	dec_preempt_count();
+	pagefault_enable();
 
 	if (unlikely(curval == -EFAULT))
 		goto uaddr_faulted;
@@ -1215,10 +1214,10 @@ static int futex_lock_pi(u32 __user *uaddr, int detect, unsigned long sec,
 			newval = current->pid |
 				FUTEX_OWNER_DIED | FUTEX_WAITERS;
 
-			inc_preempt_count();
+			pagefault_disable();
 			curval = futex_atomic_cmpxchg_inatomic(uaddr,
 							       uval, newval);
-			dec_preempt_count();
+			pagefault_enable();
 
 			if (unlikely(curval == -EFAULT))
 				goto uaddr_faulted;
@@ -1390,9 +1389,9 @@ retry_locked:
 	 * anyone else up:
 	 */
 	if (!(uval & FUTEX_OWNER_DIED)) {
-		inc_preempt_count();
+		pagefault_disable();
 		uval = futex_atomic_cmpxchg_inatomic(uaddr, current->pid, 0);
-		dec_preempt_count();
+		pagefault_enable();
 	}
 
 	if (unlikely(uval == -EFAULT))
@@ -1493,7 +1492,7 @@ static unsigned int futex_poll(struct file *filp,
 	return ret;
 }
 
-static struct file_operations futex_fops = {
+static const struct file_operations futex_fops = {
 	.release	= futex_close,
 	.poll		= futex_poll,
 };
@@ -1858,10 +1857,16 @@ static struct file_system_type futex_fs_type = {
 
 static int __init init(void)
 {
-	unsigned int i;
+	int i = register_filesystem(&futex_fs_type);
+
+	if (i)
+		return i;
 
-	register_filesystem(&futex_fs_type);
 	futex_mnt = kern_mount(&futex_fs_type);
+	if (IS_ERR(futex_mnt)) {
+		unregister_filesystem(&futex_fs_type);
+		return PTR_ERR(futex_mnt);
+	}
 
 	for (i = 0; i < ARRAY_SIZE(futex_queues); i++) {
 		INIT_LIST_HEAD(&futex_queues[i].chain);