tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 27bba9c532a8d21050b94224ffd310ad0058c353 commit: 3347acc6fcd4ee71ad18a9ff9d9dac176b517329 compiler.h: fix barrier_data() on clang date: 7 days ago config: riscv-randconfig-r003-20201121 (attached as .config) compiler: riscv32-linux-gcc (GCC) 9.3.0 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=3347acc6fcd4ee71ad18a9ff9d9dac176b517329 git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout 3347acc6fcd4ee71ad18a9ff9d9dac176b517329 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=riscv
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <l...@intel.com>
All errors (new ones prefixed by >>):
In file included from include/vdso/processor.h:10,
from arch/riscv/include/asm/processor.h:11,
from include/linux/prefetch.h:15,
from drivers/net/ethernet/intel/ixgb/ixgb_main.c:6:
arch/riscv/include/asm/vdso/processor.h: In function 'cpu_relax':
>> arch/riscv/include/asm/vdso/processor.h:14:2: error: implicit declaration of
>> function 'barrier' [-Werror=implicit-function-declaration]
14 | barrier();
| ^~~~~~~
cc1: some warnings being treated as errors
vim +/barrier +14 arch/riscv/include/asm/vdso/processor.h
ad5d1122b82fbd6 Vincent Chen 2020-06-09 6
ad5d1122b82fbd6 Vincent Chen 2020-06-09 7 static inline void cpu_relax(void)
ad5d1122b82fbd6 Vincent Chen 2020-06-09 8 {
ad5d1122b82fbd6 Vincent Chen 2020-06-09 9 #ifdef __riscv_muldiv
ad5d1122b82fbd6 Vincent Chen 2020-06-09 10 int dummy;
ad5d1122b82fbd6 Vincent Chen 2020-06-09 11 /* In lieu of a halt
instruction, induce a long-latency stall. */
ad5d1122b82fbd6 Vincent Chen 2020-06-09 12 __asm__ __volatile__ ("div %0,
%0, zero" : "=r" (dummy));
ad5d1122b82fbd6 Vincent Chen 2020-06-09 13 #endif
ad5d1122b82fbd6 Vincent Chen 2020-06-09 @14 barrier();
ad5d1122b82fbd6 Vincent Chen 2020-06-09 15 }
ad5d1122b82fbd6 Vincent Chen 2020-06-09 16
:::::: The code at line 14 was first introduced by commit
:::::: ad5d1122b82fbd6a816d1b9d26ee01a6dbc2d757 riscv: use vDSO common flow to
reduce the latency of the time-related functions
:::::: TO: Vincent Chen <vincent.c...@sifive.com>
:::::: CC: Palmer Dabbelt <palmerdabb...@google.com>
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-...@lists.01.org
.config.gz
Description: application/gzip
