io_uring/io_uring.c:2932:40: warning: variable 'prev' set but not used
From: kernel test robot
Date: Thu Aug 04 2022 - 04:45:08 EST
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: b44f2fd87919b5ae6e1756d4c7ba2cbba22238e1
commit: ed29b0b4fd835b058ddd151c49d021e28d631ee6 io_uring: move to separate directory
date: 10 days ago
config: arm-randconfig-r013-20220804 (https://download.01.org/0day-ci/archive/20220804/202208041642.HDHLXJ6J-lkp@xxxxxxxxx/config)
compiler: arm-linux-gnueabi-gcc (GCC) 12.1.0
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ed29b0b4fd835b058ddd151c49d021e28d631ee6
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout ed29b0b4fd835b058ddd151c49d021e28d631ee6
# save the config file
mkdir build_dir && cp config build_dir/.config
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=arm 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:2932:40: warning: variable 'prev' set but not used [-Wunused-but-set-variable]
2932 | struct io_wq_work_node *node, *prev;
| ^~~~
vim +/prev +2932 io_uring/io_uring.c
7a743e225b2a9da fs/io_uring.c Pavel Begunkov 2020-03-03 2928
c450178d9be9dc4 fs/io_uring.c Pavel Begunkov 2021-09-08 2929 static void __io_submit_flush_completions(struct io_ring_ctx *ctx)
a141dd896f544df fs/io_uring.c Jens Axboe 2021-08-12 2930 __must_hold(&ctx->uring_lock)
905c172f32c56f0 fs/io_uring.c Pavel Begunkov 2021-02-10 2931 {
6f33b0bc4ea43f5 fs/io_uring.c Pavel Begunkov 2021-09-24 @2932 struct io_wq_work_node *node, *prev;
cd0ca2e048dc0dd fs/io_uring.c Pavel Begunkov 2021-08-09 2933 struct io_submit_state *state = &ctx->submit_state;
905c172f32c56f0 fs/io_uring.c Pavel Begunkov 2021-02-10 2934
3d4aeb9f98058c3 fs/io_uring.c Pavel Begunkov 2021-11-10 2935 if (state->flush_cqes) {
79ebeaee8a21a00 fs/io_uring.c Jens Axboe 2021-08-10 2936 spin_lock(&ctx->completion_lock);
6f33b0bc4ea43f5 fs/io_uring.c Pavel Begunkov 2021-09-24 2937 wq_list_for_each(node, prev, &state->compl_reqs) {
6f33b0bc4ea43f5 fs/io_uring.c Pavel Begunkov 2021-09-24 2938 struct io_kiocb *req = container_of(node, struct io_kiocb,
6f33b0bc4ea43f5 fs/io_uring.c Pavel Begunkov 2021-09-24 2939 comp_list);
5182ed2e332e8e1 fs/io_uring.c Pavel Begunkov 2021-06-26 2940
f43de1f88841d59 fs/io_uring.c Pavel Begunkov 2022-06-15 2941 if (!(req->flags & REQ_F_CQE_SKIP))
91ef75a7db0d085 fs/io_uring.c Pavel Begunkov 2022-06-15 2942 __io_fill_cqe_req(ctx, req);
905c172f32c56f0 fs/io_uring.c Pavel Begunkov 2021-02-10 2943 }
3d4aeb9f98058c3 fs/io_uring.c Pavel Begunkov 2021-11-10 2944
905c172f32c56f0 fs/io_uring.c Pavel Begunkov 2021-02-10 2945 io_commit_cqring(ctx);
79ebeaee8a21a00 fs/io_uring.c Jens Axboe 2021-08-10 2946 spin_unlock(&ctx->completion_lock);
905c172f32c56f0 fs/io_uring.c Pavel Begunkov 2021-02-10 2947 io_cqring_ev_posted(ctx);
3d4aeb9f98058c3 fs/io_uring.c Pavel Begunkov 2021-11-10 2948 state->flush_cqes = false;
3d4aeb9f98058c3 fs/io_uring.c Pavel Begunkov 2021-11-10 2949 }
5182ed2e332e8e1 fs/io_uring.c Pavel Begunkov 2021-06-26 2950
1cce17aca621c38 fs/io_uring.c Pavel Begunkov 2021-09-24 2951 io_free_batch_list(ctx, state->compl_reqs.first);
6f33b0bc4ea43f5 fs/io_uring.c Pavel Begunkov 2021-09-24 2952 INIT_WQ_LIST(&state->compl_reqs);
7a743e225b2a9da fs/io_uring.c Pavel Begunkov 2020-03-03 2953 }
7a743e225b2a9da fs/io_uring.c Pavel Begunkov 2020-03-03 2954
:::::: The code at line 2932 was first introduced by commit
:::::: 6f33b0bc4ea43f5c5ce7b7c9ab66051f80837862 io_uring: use slist for completion batching
:::::: TO: Pavel Begunkov <asml.silence@xxxxxxxxx>
:::::: CC: Jens Axboe <axboe@xxxxxxxxx>
--
0-DAY CI Kernel Test Service
https://01.org/lkp