Btrfs: fix compiler warning in file.c

While compiling Btrfs, I got following messages:

  CC [M]  fs/btrfs/file.o
fs/btrfs/file.c: In function '__btrfs_buffered_write':
fs/btrfs/file.c:909: warning: 'ret' may be used uninitialized in this function
  CC [M]  fs/btrfs/tree-defrag.o

This patch fixes compiler warning.

Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index 656bc0a892b1..e621ea54a3fd 100644
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -906,7 +906,7 @@ static noinline ssize_t __btrfs_buffered_write(struct file *file,
         unsigned long last_index;
         size_t num_written = 0;
         int nrptrs;
-        int ret;
+        int ret = 0;
 
         nrptrs = min((iov_iter_count(i) + PAGE_CACHE_SIZE - 1) /
                      PAGE_CACHE_SIZE, PAGE_CACHE_SIZE /