[RFC PATCH V2 3/9] io_uring: add helper of io_req_commit_cqe()

[Ming Lei <ming.lei@redhat.com>]

Add helper of io_req_commit_cqe() which can be used in posting CQE
from both __io_submit_flush_completions() and io_req_complete_post().

Signed-off-by: Ming Lei <ming.lei@redhat.com>
---
 io_uring/io_uring.c | 34 ++++++++++++++++++++--------------
 1 file changed, 20 insertions(+), 14 deletions(-)

diff --git a/io_uring/io_uring.c b/io_uring/io_uring.c
index d3b9988cdae4..e4be930e0f1e 100644
--- a/io_uring/io_uring.c
+++ b/io_uring/io_uring.c
@@ -910,6 +910,22 @@ bool io_req_post_cqe(struct io_kiocb *req, s32 res, u32 cflags)
 	return posted;
 }
 
+static __always_inline void io_req_commit_cqe(struct io_kiocb *req,
+		bool lockless_cq)
+{
+	struct io_ring_ctx *ctx = req->ctx;
+
+	if (unlikely(!io_fill_cqe_req(ctx, req))) {
+		if (lockless_cq) {
+			spin_lock(&ctx->completion_lock);
+			io_req_cqe_overflow(req);
+			spin_unlock(&ctx->completion_lock);
+		} else {
+			io_req_cqe_overflow(req);
+		}
+	}
+}
+
 static void io_req_complete_post(struct io_kiocb *req, unsigned issue_flags)
 {
 	struct io_ring_ctx *ctx = req->ctx;
@@ -932,10 +948,8 @@ static void io_req_complete_post(struct io_kiocb *req, unsigned issue_flags)
 	}
 
 	io_cq_lock(ctx);
-	if (!(req->flags & REQ_F_CQE_SKIP)) {
-		if (!io_fill_cqe_req(ctx, req))
-			io_req_cqe_overflow(req);
-	}
+	if (!(req->flags & REQ_F_CQE_SKIP))
+		io_req_commit_cqe(req, false);
 	io_cq_unlock_post(ctx);
 
 	/*
@@ -1454,16 +1468,8 @@ void __io_submit_flush_completions(struct io_ring_ctx *ctx)
 		struct io_kiocb *req = container_of(node, struct io_kiocb,
 					    comp_list);
 
-		if (!(req->flags & REQ_F_CQE_SKIP) &&
-		    unlikely(!io_fill_cqe_req(ctx, req))) {
-			if (ctx->lockless_cq) {
-				spin_lock(&ctx->completion_lock);
-				io_req_cqe_overflow(req);
-				spin_unlock(&ctx->completion_lock);
-			} else {
-				io_req_cqe_overflow(req);
-			}
-		}
+		if (!(req->flags & REQ_F_CQE_SKIP))
+			io_req_commit_cqe(req, ctx->lockless_cq);
 	}
 	__io_cq_unlock_post(ctx);
 
-- 
2.42.0