Btrfs: return -ENOMEM in clear_extent_bit

The btrfs releasepage function depends on ENOMEM coming back when it is called atomic. Signed-off-by: Chris Mason <chris.mason@oracle.com>
mariux64 · May 26, 2011 · c309df0 · c309df0
1 parent 4cb5300
commit c309df0
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
@@ -485,7 +485,8 @@ int clear_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
 again:
 	if (!prealloc && (mask & __GFP_WAIT)) {
 		prealloc = alloc_extent_state(mask);
-		BUG_ON(!prealloc);
+		if (!prealloc)
+			return -ENOMEM;
 	}
 
 	spin_lock(&tree->lock);