[PATCH 1/2] io_uring: optimise io_req_set_rsrc_node()

[Pavel Begunkov <asml.silence@gmail.com>]

io_req_set_rsrc_node() reloads loads req->ctx, however it's already in
registers in all use cases, so better to pass it as a parameter.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
---
 fs/io_uring.c | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/fs/io_uring.c b/fs/io_uring.c
index dff732397264..24984b3f4a49 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -1175,10 +1175,9 @@ static inline void io_req_set_refcount(struct io_kiocb *req)
 	__io_req_set_refcount(req, 1);
 }
 
-static inline void io_req_set_rsrc_node(struct io_kiocb *req)
+static inline void io_req_set_rsrc_node(struct io_kiocb *req,
+					struct io_ring_ctx *ctx)
 {
-	struct io_ring_ctx *ctx = req->ctx;
-
 	if (!req->fixed_rsrc_refs) {
 		req->fixed_rsrc_refs = &ctx->rsrc_node->refs;
 		percpu_ref_get(req->fixed_rsrc_refs);
@@ -2843,7 +2842,7 @@ static int io_prep_rw(struct io_kiocb *req, const struct io_uring_sqe *sqe,
 	if (req->opcode == IORING_OP_READ_FIXED ||
 	    req->opcode == IORING_OP_WRITE_FIXED) {
 		req->imu = NULL;
-		io_req_set_rsrc_node(req);
+		io_req_set_rsrc_node(req, ctx);
 	}
 
 	req->rw.addr = READ_ONCE(sqe->addr);
@@ -6772,7 +6771,7 @@ static inline struct file *io_file_get_fixed(struct io_ring_ctx *ctx,
 	file_ptr &= ~FFS_MASK;
 	/* mask in overlapping REQ_F and FFS bits */
 	req->flags |= (file_ptr << REQ_F_NOWAIT_READ_BIT);
-	io_req_set_rsrc_node(req);
+	io_req_set_rsrc_node(req, ctx);
 	return file;
 }
 
-- 
2.33.0