1 files changed, 2 insertions, 0 deletions

diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index b30172dd55eb..ee93f82630c6 100644
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -161,6 +161,8 @@ int __ext4_ext_dirty(const char *where, unsigned int line, handle_t *handle,
                      struct inode *inode, struct ext4_ext_path *path)
 {
         int err;
+
+        WARN_ON(!rwsem_is_locked(&EXT4_I(inode)->i_data_sem));
         if (path->p_bh) {
                 ext4_extent_block_csum_set(inode, ext_block_hdr(path->p_bh));
                 /* path points to block */