tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: c0b832517f627ead3388c6f0c74e8ac10ad5774b commit: ea7f9bb7268e89fff8590ab5a360f5b27a0fc19a [2555/3220] csky: Emulate one-byte and two-byte cmpxchg config: csky-randconfig-r012-20230202 (https://download.01.org/0day-ci/archive/20240402/202404022106.mYwpypit-lkp@xxxxxxxxx/config) compiler: csky-linux-gcc (GCC) 13.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240402/202404022106.mYwpypit-lkp@xxxxxxxxx/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202404022106.mYwpypit-lkp@xxxxxxxxx/ All errors (new ones prefixed by >>): In file included from arch/csky/include/asm/atomic.h:9, from include/linux/atomic.h:7, from include/asm-generic/bitops/lock.h:5, from arch/csky/include/asm/bitops.h:69, from include/linux/bitops.h:68, from include/linux/log2.h:12, from kernel/bounds.c:13: include/linux/atomic/atomic-arch-fallback.h: In function 'raw_atomic_cmpxchg': >> arch/csky/include/asm/cmpxchg.h:138:25: error: implicit declaration of function 'cmpxchg_emu_u8' [-Werror=implicit-function-declaration] 138 | __ret = cmpxchg_emu_u8((volatile u8 *)__ptr, __old, __new); \ | ^~~~~~~~~~~~~~ arch/csky/include/asm/cmpxchg.h:165:10: note: in expansion of macro '__cmpxchg' 165 | (__cmpxchg((ptr), (o), (n), sizeof(*(ptr)))) | ^~~~~~~~~ include/linux/atomic/atomic-arch-fallback.h:55:21: note: in expansion of macro 'arch_cmpxchg' 55 | #define raw_cmpxchg arch_cmpxchg | ^~~~~~~~~~~~ include/linux/atomic/atomic-arch-fallback.h:2026:16: note: in expansion of macro 'raw_cmpxchg' 2026 | return raw_cmpxchg(&v->counter, old, new); | ^~~~~~~~~~~ >> arch/csky/include/asm/cmpxchg.h:141:25: error: implicit declaration of function 'cmpxchg_emu_u16' [-Werror=implicit-function-declaration] 141 | __ret = cmpxchg_emu_u16((volatile u16 *)__ptr, __old, __new); \ | ^~~~~~~~~~~~~~~ arch/csky/include/asm/cmpxchg.h:165:10: note: in expansion of macro '__cmpxchg' 165 | (__cmpxchg((ptr), (o), (n), sizeof(*(ptr)))) | ^~~~~~~~~ include/linux/atomic/atomic-arch-fallback.h:55:21: note: in expansion of macro 'arch_cmpxchg' 55 | #define raw_cmpxchg arch_cmpxchg | ^~~~~~~~~~~~ include/linux/atomic/atomic-arch-fallback.h:2026:16: note: in expansion of macro 'raw_cmpxchg' 2026 | return raw_cmpxchg(&v->counter, old, new); | ^~~~~~~~~~~ cc1: some warnings being treated as errors make[3]: *** [scripts/Makefile.build:117: kernel/bounds.s] Error 1 make[3]: Target 'prepare' not remade because of errors. make[2]: *** [Makefile:1197: prepare0] Error 2 make[2]: Target 'prepare' not remade because of errors. make[1]: *** [Makefile:240: __sub-make] Error 2 make[1]: Target 'prepare' not remade because of errors. make: *** [Makefile:240: __sub-make] Error 2 make: Target 'prepare' not remade because of errors. vim +/cmpxchg_emu_u8 +138 arch/csky/include/asm/cmpxchg.h 125 126 #define arch_cmpxchg_acquire(ptr, o, n) \ 127 (__cmpxchg_acquire((ptr), (o), (n), sizeof(*(ptr)))) 128 129 #define __cmpxchg(ptr, old, new, size) \ 130 ({ \ 131 __typeof__(ptr) __ptr = (ptr); \ 132 __typeof__(new) __new = (new); \ 133 __typeof__(new) __tmp; \ 134 __typeof__(old) __old = (old); \ 135 __typeof__(*(ptr)) __ret; \ 136 switch (size) { \ 137 case 1: \ > 138 __ret = cmpxchg_emu_u8((volatile u8 *)__ptr, __old, __new); \ 139 break; \ 140 case 2: \ > 141 __ret = cmpxchg_emu_u16((volatile u16 *)__ptr, __old, __new); \ 142 break; \ 143 case 4: \ 144 asm volatile ( \ 145 RELEASE_FENCE \ 146 "1: ldex.w %0, (%3) \n" \ 147 " cmpne %0, %4 \n" \ 148 " bt 2f \n" \ 149 " mov %1, %2 \n" \ 150 " stex.w %1, (%3) \n" \ 151 " bez %1, 1b \n" \ 152 FULL_FENCE \ 153 "2: \n" \ 154 : "=&r" (__ret), "=&r" (__tmp) \ 155 : "r" (__new), "r"(__ptr), "r"(__old) \ 156 :); \ 157 break; \ 158 default: \ 159 BUILD_BUG(); \ 160 } \ 161 __ret; \ 162 }) 163 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
