On Tue, Apr 16, 2024 at 05:07:03AM +0800, kernel test robot wrote: > tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master > head: 6bd343537461b57f3efe5dfc5fc193a232dfef1e > commit: d4f26ed66a53be57567bf71d60e80a116cec34e1 [4535/6266] ARC: Emulate one-byte cmpxchg > config: arc-randconfig-r016-20230816 (https://download.01.org/0day-ci/archive/20240416/202404160503.zFIp77TO-lkp@xxxxxxxxx/config) > compiler: arceb-elf-gcc (GCC) 13.2.0 > reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240416/202404160503.zFIp77TO-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/202404160503.zFIp77TO-lkp@xxxxxxxxx/ I might be suffering a failure of imagination, but I am not seeing how my change could result in these diagnostics. Please let me know what I am missing! Thanx, Paul > All errors (new ones prefixed by >>): > > In file included from include/linux/bitops.h:68, > from include/linux/log2.h:12, > from kernel/bounds.c:13: > arch/arc/include/asm/bitops.h: In function '__fls': > arch/arc/include/asm/bitops.h:137:17: error: implicit declaration of function '__builtin_arc_fls'; did you mean '__builtin_arc_flag'? [-Werror=implicit-function-declaration] > 137 | return __builtin_arc_fls(x); > | ^~~~~~~~~~~~~~~~~ > | __builtin_arc_flag > In file included from arch/arc/include/asm/atomic.h:31, > from include/linux/atomic.h:7, > from include/asm-generic/bitops/lock.h:5, > from arch/arc/include/asm/bitops.h:188: > arch/arc/include/asm/atomic64-arcv2.h: At top level: > arch/arc/include/asm/atomic64-arcv2.h:13:3: error: conflicting types for 'atomic64_t'; have 'struct <anonymous>' > 13 | } atomic64_t; > | ^~~~~~~~~~ > In file included from include/linux/page-flags.h:9, > from kernel/bounds.c:10: > include/linux/types.h:184:3: note: previous declaration of 'atomic64_t' with type 'atomic64_t' > 184 | } atomic64_t; > | ^~~~~~~~~~ > In file included from arch/arc/include/asm/atomic.h:13: > include/linux/atomic/atomic-arch-fallback.h: In function 'raw_atomic_cmpxchg': > >> arch/arc/include/asm/cmpxchg.h:73:27: error: implicit declaration of function 'cmpxchg_emu_u8' [-Werror=implicit-function-declaration] > 73 | __flags = cmpxchg_emu_u8((volatile u8 *)_p_, _o_, _n_); \ > | ^~~~~~~~~~~~~~ > 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); > | ^~~~~~~~~~~ > In file included from arch/arc/include/uapi/asm/byteorder.h:14, > from include/asm-generic/bitops/le.h:6, > from arch/arc/include/asm/bitops.h:192: > include/linux/byteorder/big_endian.h: At top level: > include/linux/byteorder/big_endian.h:8:2: warning: #warning inconsistent configuration, needs CONFIG_CPU_BIG_ENDIAN [-Wcpp] > 8 | #warning inconsistent configuration, needs CONFIG_CPU_BIG_ENDIAN > | ^~~~~~~ > 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 +73 arch/arc/include/asm/cmpxchg.h > > 62 > 63 #define arch_cmpxchg(ptr, old, new) \ > 64 ({ \ > 65 volatile __typeof__(ptr) _p_ = (ptr); \ > 66 __typeof__(*(ptr)) _o_ = (old); \ > 67 __typeof__(*(ptr)) _n_ = (new); \ > 68 __typeof__(*(ptr)) _prev_; \ > 69 unsigned long __flags; \ > 70 \ > 71 switch(sizeof((_p_))) { \ > 72 case 1: \ > > 73 __flags = cmpxchg_emu_u8((volatile u8 *)_p_, _o_, _n_); \ > 74 _prev_ = (__typeof__(*(ptr)))__flags; \ > 75 break; \ > 76 break; \ > 77 case 4: \ > 78 /* \ > 79 * spin lock/unlock provide the needed smp_mb() \ > 80 * before/after \ > 81 */ \ > 82 atomic_ops_lock(__flags); \ > 83 _prev_ = *_p_; \ > 84 if (_prev_ == _o_) \ > 85 *_p_ = _n_; \ > 86 atomic_ops_unlock(__flags); \ > 87 break; \ > 88 default: \ > 89 BUILD_BUG(); \ > 90 } \ > 91 \ > 92 _prev_; \ > 93 }) > 94 > > -- > 0-DAY CI Kernel Test Service > https://github.com/intel/lkp-tests/wiki
