tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: 593ef1658ecf61d3619885bdbbcfffa3d1417891 commit: 685fe7feedb96771683437107ba72131410e2350 [11067/14048] io-wq: eliminate the need for a manager thread config: mips-randconfig-r023-20210420 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project ca8eef7e3da8f750d7c7aa004fe426d1d34787ea) 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 mips cross compiling tool for clang build # apt-get install binutils-mips-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=685fe7feedb96771683437107ba72131410e2350 git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git git fetch --no-tags linux-next master git checkout 685fe7feedb96771683437107ba72131410e2350 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=mips If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): >> fs/io-wq.c:668:20: warning: unused function 'io_wqe_need_worker' static inline bool io_wqe_need_worker(struct io_wqe int index) ^ fatal error: error in backend: Nested variants found in inline asm string: ' .set push .set mips64r2 .if ( 0x00 ) != -1)) 0x00 ) != -1)) : ($( static struct ftrace_branch_data __attribute__((__aligned__(4))) __attribute__((__section__("_ftrace_branch"))) __if_trace = $( .func = __func__, .file = "arch/mips/include/asm/atomic.h", .line = 153, $); 0x00 ) != -1)) : $))) ) && ( 0 ); .set push; .set mips64r2; .rept 1; sync 0x00; .endr; .set pop; .else; ; .endif 1: ll $0, $1 # atomic_add addu $0, $2 sc $0, $1 beqz $0, 1b .set pop ' clang-13: error: clang frontend command failed with exit code 70 (use -v to see invocation) clang version 13.0.0 (git://gitmirror/llvm_project ca8eef7e3da8f750d7c7aa004fe426d1d34787ea) Target: mipsel-unknown-linux-gnu Thread model: posix InstalledDir: /opt/cross/clang-ca8eef7e3d/bin clang-13: note: diagnostic msg: Makefile arch block certs crypto drivers fs include init ipc kernel lib mm scripts security sound source usr virt vim +/io_wqe_need_worker +668 fs/io-wq.c 771b53d033e866 Jens Axboe 2019-10-22 667 c5def4ab849494 Jens Axboe 2019-11-07 @668 static inline bool io_wqe_need_worker(struct io_wqe *wqe, int index) 771b53d033e866 Jens Axboe 2019-10-22 669 __must_hold(wqe->lock) 771b53d033e866 Jens Axboe 2019-10-22 670 { c5def4ab849494 Jens Axboe 2019-11-07 671 struct io_wqe_acct *acct = &wqe->acct[index]; 771b53d033e866 Jens Axboe 2019-10-22 672 613eeb600e3e63 Jens Axboe 2021-02-26 673 if (acct->nr_workers && test_bit(IO_WQ_BIT_EXIT, &wqe->wq->state)) 613eeb600e3e63 Jens Axboe 2021-02-26 674 return false; c5def4ab849494 Jens Axboe 2019-11-07 675 /* if we have available workers or no work, no need */ 021d1cdda3875b Jens Axboe 2019-11-14 676 if (!hlist_nulls_empty(&wqe->free_list) || !io_wqe_run_queue(wqe)) 771b53d033e866 Jens Axboe 2019-10-22 677 return false; c5def4ab849494 Jens Axboe 2019-11-07 678 return acct->nr_workers < acct->max_workers; 771b53d033e866 Jens Axboe 2019-10-22 679 } 771b53d033e866 Jens Axboe 2019-10-22 680 :::::: The code at line 668 was first introduced by commit :::::: c5def4ab849494d3c97f6c9fc84b2ddb868fe78c io-wq: add support for bounded vs unbunded work :::::: TO: Jens Axboe <axboe@xxxxxxxxx> :::::: CC: Jens Axboe <axboe@xxxxxxxxx> --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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