From: Eric Biggers <ebiggers@xxxxxxxxxx> __block_write_begin_int(), __generic_write_end(), and guard_bio_eod() are defined in fs/buffer.c and declared in fs/internal.h, but the declarations aren't included at the point of the definitions. Include the header to enforce that the definitions match the declarations. This addresses gcc warnings when -Wmissing-prototypes is enabled. Signed-off-by: Eric Biggers <ebiggers@xxxxxxxxxx> --- fs/buffer.c | 1 + 1 file changed, 1 insertion(+) diff --git a/fs/buffer.c b/fs/buffer.c index 52d024bfdbc12..7a9937b0cb9f3 100644 --- a/fs/buffer.c +++ b/fs/buffer.c @@ -46,6 +46,7 @@ #include <linux/pagevec.h> #include <linux/sched/mm.h> #include <trace/events/block.h> +#include "internal.h" static int fsync_buffers_list(spinlock_t *lock, struct list_head *list); static int submit_bh_wbc(int op, int op_flags, struct buffer_head *bh, -- 2.20.1.97.g81188d93c3-goog