tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: 66f1e1ea3548378ff6387b1ce0b40955d54e86aa commit: 49c19389876002dc46d0c1344c056a6366745d07 [14180/15478] lib,kprobes: using try_cmpxchg_local in objpool_push config: hexagon-randconfig-r016-20230107 (https://download.01.org/0day-ci/archive/20231027/202310272207.tLPflya4-lkp@xxxxxxxxx/config) compiler: clang version 16.0.4 (https://github.com/llvm/llvm-project.git ae42196bc493ffe877a7e3dff8be32035dea4d07) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231027/202310272207.tLPflya4-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/202310272207.tLPflya4-lkp@xxxxxxxxx/ All errors (new ones prefixed by >>): >> lib/objpool.c:169:12: error: call to undeclared function 'arch_cmpxchg_local'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration] } while (!try_cmpxchg_local(&slot->tail, &tail, tail + 1)); ^ include/linux/atomic/atomic-instrumented.h:4980:2: note: expanded from macro 'try_cmpxchg_local' raw_try_cmpxchg_local(__ai_ptr, __ai_oldp, __VA_ARGS__); \ ^ include/linux/atomic/atomic-arch-fallback.h:392:9: note: expanded from macro 'raw_try_cmpxchg_local' ___r = raw_cmpxchg_local((_ptr), ___o, (_new)); \ ^ include/linux/atomic/atomic-arch-fallback.h:384:27: note: expanded from macro 'raw_cmpxchg_local' #define raw_cmpxchg_local arch_cmpxchg_local ^ 1 error generated. vim +/arch_cmpxchg_local +169 lib/objpool.c 154 155 /* adding object to slot, abort if the slot was already full */ 156 static inline int 157 objpool_try_add_slot(void *obj, struct objpool_head *pool, int cpu) 158 { 159 struct objpool_slot *slot = pool->cpu_slots[cpu]; 160 uint32_t head, tail; 161 162 /* loading tail and head as a local snapshot, tail first */ 163 tail = READ_ONCE(slot->tail); 164 165 do { 166 head = READ_ONCE(slot->head); 167 /* fault caught: something must be wrong */ 168 WARN_ON_ONCE(tail - head > pool->nr_objs); > 169 } while (!try_cmpxchg_local(&slot->tail, &tail, tail + 1)); 170 171 /* now the tail position is reserved for the given obj */ 172 WRITE_ONCE(slot->entries[tail & slot->mask], obj); 173 /* update sequence to make this obj available for pop() */ 174 smp_store_release(&slot->last, tail + 1); 175 176 return 0; 177 } 178 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
