Btrfs: make sure we're not using obsolete code in btrfs_get_extent

There's code in btrfs_get_extent that should never be used. This patch turns
a WARN_ON(1) into a BUG(), hoping we can remove the transaction code from
btrfs_get_extent soon.

Signed-off-by: Jan Schmidt <list.btrfs@jan-o-sch.net>

1 files changed, 1 insertions, 1 deletions

diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index ea819386b864..603d740f0f1c 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -5022,7 +5022,7 @@ again:
                         }
                         flush_dcache_page(page);
                 } else if (create && PageUptodate(page)) {
-                        WARN_ON(1);
+                        BUG();
                         if (!trans) {
                                 kunmap(page);
                                 free_extent_map(em);