[PATCH 1/4] io_uring/kbuf: add io_kbuf_commit() helper

[Jens Axboe <axboe@kernel.dk>]

Committing the selected ring buffer is currently done in two different
spots, combine it into a helper and just call that.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
 io_uring/kbuf.c |  3 +--
 io_uring/kbuf.h | 14 ++++++++++----
 2 files changed, 11 insertions(+), 6 deletions(-)

diff --git a/io_uring/kbuf.c b/io_uring/kbuf.c
index a4bde998f50d..e43f761fa073 100644
--- a/io_uring/kbuf.c
+++ b/io_uring/kbuf.c
@@ -171,9 +171,8 @@ static void __user *io_ring_buffer_select(struct io_kiocb *req, size_t *len,
 		 * the transfer completes (or if we get -EAGAIN and must poll of
 		 * retry).
 		 */
-		req->flags &= ~REQ_F_BUFFERS_COMMIT;
+		io_kbuf_commit(req, bl, 1);
 		req->buf_list = NULL;
-		bl->head++;
 	}
 	return u64_to_user_ptr(buf->addr);
 }
diff --git a/io_uring/kbuf.h b/io_uring/kbuf.h
index 2ed141d7662e..c9798663cd9f 100644
--- a/io_uring/kbuf.h
+++ b/io_uring/kbuf.h
@@ -121,15 +121,21 @@ static inline bool io_kbuf_recycle(struct io_kiocb *req, unsigned issue_flags)
 	return false;
 }
 
+static inline void io_kbuf_commit(struct io_kiocb *req,
+				  struct io_buffer_list *bl, int nr)
+{
+	if (unlikely(!(req->flags & REQ_F_BUFFERS_COMMIT)))
+		return;
+	bl->head += nr;
+	req->flags &= ~REQ_F_BUFFERS_COMMIT;
+}
+
 static inline void __io_put_kbuf_ring(struct io_kiocb *req, int nr)
 {
 	struct io_buffer_list *bl = req->buf_list;
 
 	if (bl) {
-		if (req->flags & REQ_F_BUFFERS_COMMIT) {
-			bl->head += nr;
-			req->flags &= ~REQ_F_BUFFERS_COMMIT;
-		}
+		io_kbuf_commit(req, bl, nr);
 		req->buf_index = bl->bgid;
 	}
 	req->flags &= ~REQ_F_BUFFER_RING;
-- 
2.43.0