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McKenney" Cc: oe-kbuild-all@lists.linux.dev, linux-kernel@vger.kernel.org Subject: [paulmck-rcu:dev.2024.03.27b 64/69] arch/xtensa/include/asm/cmpxchg.h:77:25: error: implicit declaration of function 'cmpxchg_emu_u8' Message-ID: <202403292321.T55etywH-lkp@intel.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline tree: https://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git dev.2024.03.27b head: 786fab3085d764055a78edb54023420920344333 commit: b3b1a154281fc97efc4c1d5818a83c29c228dbd5 [64/69] xtensa: Emulate one-byte and two-byte cmpxchg config: xtensa-allnoconfig (https://download.01.org/0day-ci/archive/20240329/202403292321.T55etywH-lkp@intel.com/config) compiler: xtensa-linux-gcc (GCC) 13.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240329/202403292321.T55etywH-lkp@intel.com/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 | Closes: https://lore.kernel.org/oe-kbuild-all/202403292321.T55etywH-lkp@intel.com/ All errors (new ones prefixed by >>): In file included from arch/xtensa/include/asm/atomic.h:19, from include/linux/atomic.h:7, from include/asm-generic/bitops/atomic.h:5, from arch/xtensa/include/asm/bitops.h:192, from include/linux/bitops.h:68, from include/linux/log2.h:12, from kernel/bounds.c:13: arch/xtensa/include/asm/cmpxchg.h: In function '__cmpxchg': >> arch/xtensa/include/asm/cmpxchg.h:77:25: error: implicit declaration of function 'cmpxchg_emu_u8' [-Werror=implicit-function-declaration] 77 | case 1: return cmpxchg_emu_u8((volatile u8 *)ptr, old, new); | ^~~~~~~~~~~~~~ >> arch/xtensa/include/asm/cmpxchg.h:78:25: error: implicit declaration of function 'cmpxchg_emu_u16' [-Werror=implicit-function-declaration] 78 | case 2: return cmpxchg_emu_u16((volatile u16 *)ptr, 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 +77 arch/xtensa/include/asm/cmpxchg.h 72 73 static __inline__ unsigned long 74 __cmpxchg(volatile void *ptr, unsigned long old, unsigned long new, int size) 75 { 76 switch (size) { > 77 case 1: return cmpxchg_emu_u8((volatile u8 *)ptr, old, new); > 78 case 2: return cmpxchg_emu_u16((volatile u16 *)ptr, old, new); 79 case 4: return __cmpxchg_u32(ptr, old, new); 80 default: __cmpxchg_called_with_bad_pointer(); 81 return old; 82 } 83 } 84 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki