---

yaml
---
r: 154296
b: refs/heads/master
c: 641cf4a
h: refs/heads/master
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: bd453cd487ac7116a269517779b83c1061debbec
+refs/heads/master: 641cf4a668e9e69d2bc061e953422ff72a91f86e

trunk/include/linux/posix_acl.h

@@ -83,6 +83,7 @@ extern int posix_acl_chmod_masq(struct posix_acl *, mode_t);
 extern struct posix_acl *get_posix_acl(struct inode *, int);
 extern int set_posix_acl(struct inode *, int, struct posix_acl *);
 
+#ifdef CONFIG_FS_POSIX_ACL
 static inline struct posix_acl *get_cached_acl(struct inode *inode, int type)
 {
 	struct posix_acl **p, *acl;
@@ -146,5 +147,5 @@ static inline void forget_cached_acl(struct inode *inode, int type)
 	if (old != ACL_NOT_CACHED)
 		posix_acl_release(old);
 }
-
+#endif
 #endif  /* __LINUX_POSIX_ACL_H */

trunk/kernel/futex.c

@@ -284,25 +284,6 @@ void put_futex_key(int fshared, union futex_key *key)
 	drop_futex_key_refs(key);
 }
 
-/*
- * fault_in_user_writeable - fault in user address and verify RW access
- * @uaddr:	pointer to faulting user space address
- *
- * Slow path to fixup the fault we just took in the atomic write
- * access to @uaddr.
- *
- * We have no generic implementation of a non destructive write to the
- * user address. We know that we faulted in the atomic pagefault
- * disabled section so we can as well avoid the #PF overhead by
- * calling get_user_pages() right away.
- */
-static int fault_in_user_writeable(u32 __user *uaddr)
-{
-	int ret = get_user_pages(current, current->mm, (unsigned long)uaddr,
-				 sizeof(*uaddr), 1, 0, NULL, NULL);
-	return ret < 0 ? ret : 0;
-}
-
 /**
  * futex_top_waiter() - Return the highest priority waiter on a futex
  * @hb:     the hash bucket the futex_q's reside in
@@ -915,6 +896,7 @@ futex_wake_op(u32 __user *uaddr1, int fshared, u32 __user *uaddr2,
 retry_private:
 	op_ret = futex_atomic_op_inuser(op, uaddr2);
 	if (unlikely(op_ret < 0)) {
+		u32 dummy;
 
 		double_unlock_hb(hb1, hb2);
 
@@ -932,7 +914,7 @@ futex_wake_op(u32 __user *uaddr1, int fshared, u32 __user *uaddr2,
 			goto out_put_keys;
 		}
 
-		ret = fault_in_user_writeable(uaddr2);
+		ret = get_user(dummy, uaddr2);
 		if (ret)
 			goto out_put_keys;
 
@@ -1222,7 +1204,7 @@ static int futex_requeue(u32 __user *uaddr1, int fshared, u32 __user *uaddr2,
 			double_unlock_hb(hb1, hb2);
 			put_futex_key(fshared, &key2);
 			put_futex_key(fshared, &key1);
-			ret = fault_in_user_writeable(uaddr2);
+			ret = get_user(curval2, uaddr2);
 			if (!ret)
 				goto retry;
 			goto out;
@@ -1500,7 +1482,7 @@ static int fixup_pi_state_owner(u32 __user *uaddr, struct futex_q *q,
 handle_fault:
 	spin_unlock(q->lock_ptr);
 
-	ret = fault_in_user_writeable(uaddr);
+	ret = get_user(uval, uaddr);
 
 	spin_lock(q->lock_ptr);
 
@@ -1825,6 +1807,7 @@ static int futex_lock_pi(u32 __user *uaddr, int fshared,
 {
 	struct hrtimer_sleeper timeout, *to = NULL;
 	struct futex_hash_bucket *hb;
+	u32 uval;
 	struct futex_q q;
 	int res, ret;
 
@@ -1926,9 +1909,16 @@ static int futex_lock_pi(u32 __user *uaddr, int fshared,
 	return ret != -EINTR ? ret : -ERESTARTNOINTR;
 
 uaddr_faulted:
+	/*
+	 * We have to r/w  *(int __user *)uaddr, and we have to modify it
+	 * atomically.  Therefore, if we continue to fault after get_user()
+	 * below, we need to handle the fault ourselves, while still holding
+	 * the mmap_sem.  This can occur if the uaddr is under contention as
+	 * we have to drop the mmap_sem in order to call get_user().
+	 */
 	queue_unlock(&q, hb);
 
-	ret = fault_in_user_writeable(uaddr);
+	ret = get_user(uval, uaddr);
 	if (ret)
 		goto out_put_key;
 
@@ -2023,10 +2013,17 @@ static int futex_unlock_pi(u32 __user *uaddr, int fshared)
 	return ret;
 
 pi_faulted:
+	/*
+	 * We have to r/w  *(int __user *)uaddr, and we have to modify it
+	 * atomically.  Therefore, if we continue to fault after get_user()
+	 * below, we need to handle the fault ourselves, while still holding
+	 * the mmap_sem.  This can occur if the uaddr is under contention as
+	 * we have to drop the mmap_sem in order to call get_user().
+	 */
 	spin_unlock(&hb->lock);
 	put_futex_key(fshared, &key);
 
-	ret = fault_in_user_writeable(uaddr);
+	ret = get_user(uval, uaddr);
 	if (!ret)
 		goto retry;
 

trunk/mm/page_alloc.c

@@ -1153,10 +1153,10 @@ struct page *buffered_rmqueue(struct zone *preferred_zone,
 			 * properly detect and handle allocation failures.
 			 *
 			 * We most definitely don't want callers attempting to
-			 * allocate greater than order-1 page units with
+			 * allocate greater than single-page units with
 			 * __GFP_NOFAIL.
 			 */
-			WARN_ON_ONCE(order > 1);
+			WARN_ON_ONCE(order > 0);
 		}
 		spin_lock_irqsave(&zone->lock, flags);
 		page = __rmqueue(zone, order, migratetype);

trunk/mm/slub.c

@@ -1085,17 +1085,11 @@ static struct page *allocate_slab(struct kmem_cache *s, gfp_t flags, int node)
 {
 	struct page *page;
 	struct kmem_cache_order_objects oo = s->oo;
-	gfp_t alloc_gfp;
 
 	flags |= s->allocflags;
 
-	/*
-	 * Let the initial higher-order allocation fail under memory pressure
-	 * so we fall-back to the minimum order allocation.
-	 */
-	alloc_gfp = (flags | __GFP_NOWARN | __GFP_NORETRY) & ~__GFP_NOFAIL;
-
-	page = alloc_slab_page(alloc_gfp, node, oo);
+	page = alloc_slab_page(flags | __GFP_NOWARN | __GFP_NORETRY, node,
+									oo);
 	if (unlikely(!page)) {
 		oo = s->min;
 		/*