Get "no acls for this inode" right, fix shmem breakage

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

fs/btrfs/inode.c

@@ -2122,10 +2122,8 @@ static void btrfs_read_locked_inode(struct inode *inode)
 	 * any xattrs or acls
 	 */
 	maybe_acls = acls_after_inode_item(leaf, path->slots[0], inode->i_ino);
-	if (!maybe_acls) {
-		inode->i_acl = NULL;
-		inode->i_default_acl = NULL;
-	}
+	if (!maybe_acls)
+		cache_no_acl(inode);
 
 	BTRFS_I(inode)->block_group = btrfs_find_block_group(root, 0,
 						alloc_group_block, 0);

fs/jffs2/acl.c

@@ -284,8 +284,7 @@ int jffs2_init_acl_pre(struct inode *dir_i, struct inode *inode, int *i_mode)
 	struct posix_acl *acl, *clone;
 	int rc;
 
-	inode->i_default_acl = NULL;
-	inode->i_acl = NULL;
+	cache_no_acl(inode);
 
 	if (S_ISLNK(*i_mode))
 		return 0;	/* Symlink always has no-ACL */

include/linux/posix_acl.h

@@ -148,4 +148,13 @@ static inline void forget_cached_acl(struct inode *inode, int type)
 		posix_acl_release(old);
 }
 #endif
+
+static inline void cache_no_acl(struct inode *inode)
+{
+#ifdef CONFIG_FS_POSIX_ACL
+	inode->i_acl = NULL;
+	inode->i_default_acl = NULL;
+#endif
+}
+
 #endif  /* __LINUX_POSIX_ACL_H */

mm/shmem.c

@@ -1558,6 +1558,7 @@ static struct inode *shmem_get_inode(struct super_block *sb, int mode,
 		spin_lock_init(&info->lock);
 		info->flags = flags & VM_NORESERVE;
 		INIT_LIST_HEAD(&info->swaplist);
+		cache_no_acl(inode);
 
 		switch (mode & S_IFMT) {
 		default:
@@ -2379,10 +2380,6 @@ static struct inode *shmem_alloc_inode(struct super_block *sb)
 	p = (struct shmem_inode_info *)kmem_cache_alloc(shmem_inode_cachep, GFP_KERNEL);
 	if (!p)
 		return NULL;
-#ifdef CONFIG_TMPFS_POSIX_ACL
-	p->vfs_inode.i_acl = NULL;
-	p->vfs_inode.i_default_acl = NULL;
-#endif
 	return &p->vfs_inode;
 }