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Revert "io_uring: add buffer selection support to IORING_OP_NOP"

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This reverts commit 3d200242a6.

Buffer selection with nops was used for debugging and benchmarking but
is useless in real life. Let's revert it before it's released.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/c5012098ca6b51dfbdcb190f8c4e3c0bf1c965dc.1655224415.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Pavel Begunkov 2022-06-14 17:51:17 +01:00 committed by Jens Axboe
parent 8899ce4b2f
commit aa165d6d2b
1 changed files with 1 additions and 14 deletions
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15
fs/io_uring.c
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@ -1114,7 +1114,6 @@ static const struct io_op_def io_op_defs[] = {
[IORING_OP_NOP] = {
.audit_skip = 1,
.iopoll = 1,
.buffer_select = 1,
},
[IORING_OP_READV] = {
.needs_file = 1,
@ -5269,19 +5268,7 @@ static int io_nop_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
*/
static int io_nop(struct io_kiocb *req, unsigned int issue_flags)
{
unsigned int cflags;
void __user *buf;
if (req->flags & REQ_F_BUFFER_SELECT) {
size_t len = 1;
buf = io_buffer_select(req, &len, issue_flags);
if (!buf)
return -ENOBUFS;
}
cflags = io_put_kbuf(req, issue_flags);
__io_req_complete(req, issue_flags, 0, cflags);
__io_req_complete(req, issue_flags, 0, 0);
return 0;
}