io_uring: open code io_fill_cqe_req()

io_fill_cqe_req() is only called from one place, open code it, and
rename __io_fill_cqe_req().

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/f432ce75bb1c94cadf0bd2add4d6aa510bd1fb36.1691757663.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>

Author: isilence

io_uring/io_uring.c

@@ -978,8 +978,10 @@ static void __io_req_complete_post(struct io_kiocb *req, unsigned issue_flags)
 	struct io_rsrc_node *rsrc_node = NULL;
 
 	io_cq_lock(ctx);
-	if (!(req->flags & REQ_F_CQE_SKIP))
-		io_fill_cqe_req(ctx, req);
+	if (!(req->flags & REQ_F_CQE_SKIP)) {
+		if (!io_fill_cqe_req(ctx, req))
+			io_req_cqe_overflow(req);
+	}
 
 	/*
 	 * If we're the last reference to this request, add to our locked
@@ -1556,7 +1558,7 @@ static void __io_submit_flush_completions(struct io_ring_ctx *ctx)
 					    comp_list);
 
 		if (!(req->flags & REQ_F_CQE_SKIP) &&
-		    unlikely(!__io_fill_cqe_req(ctx, req))) {
+		    unlikely(!io_fill_cqe_req(ctx, req))) {
 			if (ctx->task_complete) {
 				spin_lock(&ctx->completion_lock);
 				io_req_cqe_overflow(req);

io_uring/io_uring.h

@@ -133,8 +133,7 @@ static inline struct io_uring_cqe *io_get_cqe(struct io_ring_ctx *ctx)
 	return io_get_cqe_overflow(ctx, false);
 }
 
-static inline bool __io_fill_cqe_req(struct io_ring_ctx *ctx,
-				     struct io_kiocb *req)
+static inline bool io_fill_cqe_req(struct io_ring_ctx *ctx, struct io_kiocb *req)
 {
 	struct io_uring_cqe *cqe;
 
@@ -168,14 +167,6 @@ static inline bool __io_fill_cqe_req(struct io_ring_ctx *ctx,
 	return true;
 }
 
-static inline bool io_fill_cqe_req(struct io_ring_ctx *ctx,
-				   struct io_kiocb *req)
-{
-	if (likely(__io_fill_cqe_req(ctx, req)))
-		return true;
-	return io_req_cqe_overflow(req);
-}
-
 static inline void req_set_fail(struct io_kiocb *req)
 {
 	req->flags |= REQ_F_FAIL;

io_uring/rw.c

@@ -1064,7 +1064,7 @@ int io_do_iopoll(struct io_ring_ctx *ctx, bool force_nonspin)
 			continue;
 
 		req->cqe.flags = io_put_kbuf(req, 0);
-		if (unlikely(!__io_fill_cqe_req(ctx, req))) {
+		if (unlikely(!io_fill_cqe_req(ctx, req))) {
 			spin_lock(&ctx->completion_lock);
 			io_req_cqe_overflow(req);
 			spin_unlock(&ctx->completion_lock);