Btrfs: fix use of uninitialized err variable

fs/btrfs/file.c: In function ‘prepare_pages.isra.18’:
fs/btrfs/file.c:1265:6: warning: ‘err’ may be used uninitialized in this function [-Wuninitialized]

Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com>
Signed-off-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: Chris Mason <clm@fb.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index 740ae8c71701..35bf83876f3f 100644
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -1244,7 +1244,7 @@ static noinline int prepare_pages(struct inode *inode, struct page **pages,
         int i;
         unsigned long index = pos >> PAGE_CACHE_SHIFT;
         gfp_t mask = btrfs_alloc_write_mask(inode->i_mapping);
-        int err;
+        int err = 0;
         int faili;
 
         for (i = 0; i < num_pages; i++) {