Btrfs: Fix delayed allocation to avoid missing delalloc extents
find_lock_delalloc_range could exit out too early
Signed-off-by: Chris Mason <chris.mason@oracle.com>
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 1e725a4..55b2e14 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -798,6 +798,7 @@
u64 page_start = (u64)page->index << PAGE_CACHE_SHIFT;
u64 page_end = page_start + PAGE_CACHE_SIZE - 1;
+ WARN_ON(!PageLocked(page));
set_page_extent_mapped(page);
lock_extent(em_tree, page_start, page_end, GFP_NOFS);