[PATCHv5 02/11] io_uring/nop: reuse req->buf_index

[Keith Busch <kbusch@meta.com>]

From: Keith Busch <kbusch@kernel.org>

There is already a field in io_kiocb that can store a registered buffer
index, use that instead of stashing the value into struct io_nop.

Signed-off-by: Keith Busch <kbusch@kernel.org>
---
 io_uring/nop.c | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/io_uring/nop.c b/io_uring/nop.c
index 5e5196df650a1..ea539531cb5f6 100644
--- a/io_uring/nop.c
+++ b/io_uring/nop.c
@@ -16,7 +16,6 @@ struct io_nop {
 	struct file     *file;
 	int             result;
 	int		fd;
-	int		buffer;
 	unsigned int	flags;
 };
 
@@ -40,9 +39,7 @@ int io_nop_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
 	else
 		nop->fd = -1;
 	if (nop->flags & IORING_NOP_FIXED_BUFFER)
-		nop->buffer = READ_ONCE(sqe->buf_index);
-	else
-		nop->buffer = -1;
+		req->buf_index = READ_ONCE(sqe->buf_index);
 	return 0;
 }
 
@@ -69,7 +66,7 @@ int io_nop(struct io_kiocb *req, unsigned int issue_flags)
 
 		ret = -EFAULT;
 		io_ring_submit_lock(ctx, issue_flags);
-		node = io_rsrc_node_lookup(&ctx->buf_table, nop->buffer);
+		node = io_rsrc_node_lookup(&ctx->buf_table, req->buf_index);
 		if (node) {
 			io_req_assign_buf_node(req, node);
 			ret = 0;
-- 
2.43.5