jbd: Convert atomic_inc() to get_bh()

Convert atomic_inc(&bh->b_count) to get_bh(bh) for consistency.

Signed-off-by: Namhyung Kim <namhyung@gmail.com>
Signed-off-by: Jan Kara <jack@suse.cz>
diff --git a/fs/jbd/commit.c b/fs/jbd/commit.c
index c842832..a89c463 100644
--- a/fs/jbd/commit.c
+++ b/fs/jbd/commit.c
@@ -611,7 +611,7 @@
 		/* Bump b_count to prevent truncate from stumbling over
                    the shadowed buffer!  @@@ This can go if we ever get
                    rid of the BJ_IO/BJ_Shadow pairing of buffers. */
-		atomic_inc(&jh2bh(jh)->b_count);
+		get_bh(jh2bh(jh));
 
 		/* Make a temporary IO buffer with which to write it out
                    (this will requeue both the metadata buffer and the