[ammarfaizi2-block:stable/linux-stable-rc/queue/5.19 294/1034] io_uring/io_uring.c:3150:40: warning: variable 'prev' set but not used
From: kernel test robot
Date: Sat Aug 13 2022 - 22:06:04 EST
tree: https://github.com/ammarfaizi2/linux-block stable/linux-stable-rc/queue/5.19
head: a93eab25d54766b1d89d7fa7dd315b3fc268d0b5
commit: a1fd6af4b362b4f8ed0d7f5a78f0e8ff2f15d70f [294/1034] io_uring: move to separate directory
config: x86_64-randconfig-a013 (https://download.01.org/0day-ci/archive/20220814/202208140958.F7WLU1BS-lkp@xxxxxxxxx/config)
compiler: gcc-11 (Debian 11.3.0-3) 11.3.0
reproduce (this is a W=1 build):
# https://github.com/ammarfaizi2/linux-block/commit/a1fd6af4b362b4f8ed0d7f5a78f0e8ff2f15d70f
git remote add ammarfaizi2-block https://github.com/ammarfaizi2/linux-block
git fetch --no-tags ammarfaizi2-block stable/linux-stable-rc/queue/5.19
git checkout a1fd6af4b362b4f8ed0d7f5a78f0e8ff2f15d70f
# save the config file
mkdir build_dir && cp config build_dir/.config
make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash
If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp@xxxxxxxxx>
All warnings (new ones prefixed by >>):
io_uring/io_uring.c: In function '__io_submit_flush_completions':
>> io_uring/io_uring.c:3150:40: warning: variable 'prev' set but not used [-Wunused-but-set-variable]
3150 | struct io_wq_work_node *node, *prev;
| ^~~~
vim +/prev +3150 io_uring/io_uring.c
7a743e225b2a9da fs/io_uring.c Pavel Begunkov 2020-03-03 3146
c450178d9be9dc4 fs/io_uring.c Pavel Begunkov 2021-09-08 3147 static void __io_submit_flush_completions(struct io_ring_ctx *ctx)
a141dd896f544df fs/io_uring.c Jens Axboe 2021-08-12 3148 __must_hold(&ctx->uring_lock)
905c172f32c56f0 fs/io_uring.c Pavel Begunkov 2021-02-10 3149 {
6f33b0bc4ea43f5 fs/io_uring.c Pavel Begunkov 2021-09-24 @3150 struct io_wq_work_node *node, *prev;
cd0ca2e048dc0dd fs/io_uring.c Pavel Begunkov 2021-08-09 3151 struct io_submit_state *state = &ctx->submit_state;
905c172f32c56f0 fs/io_uring.c Pavel Begunkov 2021-02-10 3152
3d4aeb9f98058c3 fs/io_uring.c Pavel Begunkov 2021-11-10 3153 if (state->flush_cqes) {
79ebeaee8a21a00 fs/io_uring.c Jens Axboe 2021-08-10 3154 spin_lock(&ctx->completion_lock);
6f33b0bc4ea43f5 fs/io_uring.c Pavel Begunkov 2021-09-24 3155 wq_list_for_each(node, prev, &state->compl_reqs) {
6f33b0bc4ea43f5 fs/io_uring.c Pavel Begunkov 2021-09-24 3156 struct io_kiocb *req = container_of(node, struct io_kiocb,
6f33b0bc4ea43f5 fs/io_uring.c Pavel Begunkov 2021-09-24 3157 comp_list);
5182ed2e332e8e1 fs/io_uring.c Pavel Begunkov 2021-06-26 3158
f43de1f88841d59 fs/io_uring.c Pavel Begunkov 2022-06-15 3159 if (!(req->flags & REQ_F_CQE_SKIP))
91ef75a7db0d085 fs/io_uring.c Pavel Begunkov 2022-06-15 3160 __io_fill_cqe_req(ctx, req);
905c172f32c56f0 fs/io_uring.c Pavel Begunkov 2021-02-10 3161 }
3d4aeb9f98058c3 fs/io_uring.c Pavel Begunkov 2021-11-10 3162
905c172f32c56f0 fs/io_uring.c Pavel Begunkov 2021-02-10 3163 io_commit_cqring(ctx);
79ebeaee8a21a00 fs/io_uring.c Jens Axboe 2021-08-10 3164 spin_unlock(&ctx->completion_lock);
905c172f32c56f0 fs/io_uring.c Pavel Begunkov 2021-02-10 3165 io_cqring_ev_posted(ctx);
3d4aeb9f98058c3 fs/io_uring.c Pavel Begunkov 2021-11-10 3166 state->flush_cqes = false;
3d4aeb9f98058c3 fs/io_uring.c Pavel Begunkov 2021-11-10 3167 }
5182ed2e332e8e1 fs/io_uring.c Pavel Begunkov 2021-06-26 3168
1cce17aca621c38 fs/io_uring.c Pavel Begunkov 2021-09-24 3169 io_free_batch_list(ctx, state->compl_reqs.first);
6f33b0bc4ea43f5 fs/io_uring.c Pavel Begunkov 2021-09-24 3170 INIT_WQ_LIST(&state->compl_reqs);
7a743e225b2a9da fs/io_uring.c Pavel Begunkov 2020-03-03 3171 }
7a743e225b2a9da fs/io_uring.c Pavel Begunkov 2020-03-03 3172
:::::: The code at line 3150 was first introduced by commit
:::::: 6f33b0bc4ea43f5c5ce7b7c9ab66051f80837862 io_uring: use slist for completion batching
:::::: TO: Pavel Begunkov <asml.silence@xxxxxxxxx>
:::::: CC: Jens Axboe <axboe@xxxxxxxxx>
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