[kbuild-all] Re: fs/io_uring.c:6920:12: warning: stack frame size of 1040 bytes in function 'io_submit_sqes'

On 23/03/2021 11:31, kernel test robot wrote: > tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master > head: 84196390620ac0e5070ae36af84c137c6216a7dc > commit: e5d1bc0a91f16959aa279aa3ee9fdc246d4bb382 io_uring: defer flushing cached reqs > date: 6 weeks ago > config: powerpc64-randconfig-r023-20210323 (attached as .config) > compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 14696baaf4c43fe53f738bc292bbe169eed93d5d) > 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 > # install powerpc64 cross compiling tool for clang build > # apt-get install binutils-powerpc64-linux-gnu > # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit... > git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git > git fetch --no-tags linus master > git checkout e5d1bc0a91f16959aa279aa3ee9fdc246d4bb382 > # save the attached .config to linux build tree > COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=powerpc64 > > If you fix the issue, kindly add following tag as appropriate > Reported-by: kernel test robot <lkp(a)intel.com&gt; > > All warnings (new ones prefixed by >>): > >>> fs/io_uring.c:6920:12: warning: stack frame size of 1040 bytes in function 'io_submit_sqes' [-Wframe-larger-than=] > static int io_submit_sqes(struct io_ring_ctx *ctx, unsigned int nr) > ^ > 1 warning generated. b I don't know, for up-to-date code all submission functions are under 128 bytes for me, including io_submit_sqes with everything heavily inlined into it. I believe it's just a strange config keeping everything on stack for some reason (too under optimised?).