Hi Nicholas, I love your patch! Perhaps something to improve: [auto build test WARNING on powerpc/next] [also build test WARNING on asm-generic/master linus/master v5.10-rc3 next-20201111] [cannot apply to scottwood/next] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch] url: https://github.com/0day-ci/linux/commits/Nicholas-Piggin/powerpc-convert-... base: https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git next config: powerpc-allyesconfig (attached as .config) compiler: powerpc64-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://github.com/0day-ci/linux/commit/9e1bec8fe216b0745c647e52c40d1f003... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Nicholas-Piggin/powerpc-convert-to-use-ARCH_ATOMIC/20201111-190941 git checkout 9e1bec8fe216b0745c647e52c40d1f0033fb4efd # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=powerpc If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): In file included from arch/powerpc/include/asm/atomic.h:11, from include/linux/atomic.h:7, from include/linux/rcupdate.h:25, from include/linux/rculist.h:11, from include/linux/sched/signal.h:5, from drivers/gpu/drm/drm_lock.c:37: drivers/gpu/drm/drm_lock.c: In function 'drm_lock_take': 463 | (__typeof__(*(ptr))) __cmpxchg_relaxed((ptr), \ | ^~~~~ include/linux/atomic.h:73:9: note: in expansion of macro 'arch_cmpxchg_relaxed' 73 | typeof(op##_relaxed(args)) __ret; \ | ^~ include/linux/atomic-arch-fallback.h:52:2: note: in expansion of macro '__atomic_op_fence' 52 | __atomic_op_fence(arch_cmpxchg, __VA_ARGS__) | ^~~~~~~~~~~~~~~~~ include/asm-generic/atomic-instrumented.h:1685:2: note: in expansion of macro 'arch_cmpxchg' 1685 | arch_cmpxchg(__ai_ptr, __VA_ARGS__); \ | ^~~~~~~~~~~~ drivers/gpu/drm/drm_lock.c:75:10: note: in expansion of macro 'cmpxchg' 75 | prev = cmpxchg(lock, old, new); | ^~~~~~~ arch/powerpc/include/asm/cmpxchg.h:432:25: note: expected 'void *' but argument is of type 'volatile unsigned int *' 432 | __cmpxchg_relaxed(void *ptr, unsigned long old, unsigned long new, | ~~~~~~^~~ 463 | (__typeof__(*(ptr))) __cmpxchg_relaxed((ptr), \ | ^~~~~ include/linux/atomic.h:75:10: note: in expansion of macro 'arch_cmpxchg_relaxed' 75 | __ret = op##_relaxed(args); \ | ^~ include/linux/atomic-arch-fallback.h:52:2: note: in expansion of macro '__atomic_op_fence' 52 | __atomic_op_fence(arch_cmpxchg, __VA_ARGS__) | ^~~~~~~~~~~~~~~~~ include/asm-generic/atomic-instrumented.h:1685:2: note: in expansion of macro 'arch_cmpxchg' 1685 | arch_cmpxchg(__ai_ptr, __VA_ARGS__); \ | ^~~~~~~~~~~~ drivers/gpu/drm/drm_lock.c:75:10: note: in expansion of macro 'cmpxchg' 75 | prev = cmpxchg(lock, old, new); | ^~~~~~~ arch/powerpc/include/asm/cmpxchg.h:432:25: note: expected 'void *' but argument is of type 'volatile unsigned int *' 432 | __cmpxchg_relaxed(void *ptr, unsigned long old, unsigned long new, | ~~~~~~^~~ drivers/gpu/drm/drm_lock.c: In function 'drm_lock_transfer': 463 | (__typeof__(*(ptr))) __cmpxchg_relaxed((ptr), \ | ^~~~~ include/linux/atomic.h:73:9: note: in expansion of macro 'arch_cmpxchg_relaxed' 73 | typeof(op##_relaxed(args)) __ret; \ | ^~ include/linux/atomic-arch-fallback.h:52:2: note: in expansion of macro '__atomic_op_fence' 52 | __atomic_op_fence(arch_cmpxchg, __VA_ARGS__) | ^~~~~~~~~~~~~~~~~ include/asm-generic/atomic-instrumented.h:1685:2: note: in expansion of macro 'arch_cmpxchg' 1685 | arch_cmpxchg(__ai_ptr, __VA_ARGS__); \ | ^~~~~~~~~~~~ drivers/gpu/drm/drm_lock.c:118:10: note: in expansion of macro 'cmpxchg' 118 | prev = cmpxchg(lock, old, new); | ^~~~~~~ arch/powerpc/include/asm/cmpxchg.h:432:25: note: expected 'void *' but argument is of type 'volatile unsigned int *' 432 | __cmpxchg_relaxed(void *ptr, unsigned long old, unsigned long new, | ~~~~~~^~~ 463 | (__typeof__(*(ptr))) __cmpxchg_relaxed((ptr), \ | ^~~~~ include/linux/atomic.h:75:10: note: in expansion of macro 'arch_cmpxchg_relaxed' 75 | __ret = op##_relaxed(args); \ | ^~ include/linux/atomic-arch-fallback.h:52:2: note: in expansion of macro '__atomic_op_fence' 52 | __atomic_op_fence(arch_cmpxchg, __VA_ARGS__) | ^~~~~~~~~~~~~~~~~ include/asm-generic/atomic-instrumented.h:1685:2: note: in expansion of macro 'arch_cmpxchg' 1685 | arch_cmpxchg(__ai_ptr, __VA_ARGS__); \ | ^~~~~~~~~~~~ drivers/gpu/drm/drm_lock.c:118:10: note: in expansion of macro 'cmpxchg' 118 | prev = cmpxchg(lock, old, new); | ^~~~~~~ arch/powerpc/include/asm/cmpxchg.h:432:25: note: expected 'void *' but argument is of type 'volatile unsigned int *' 432 | __cmpxchg_relaxed(void *ptr, unsigned long old, unsigned long new, | ~~~~~~^~~ drivers/gpu/drm/drm_lock.c: In function 'drm_legacy_lock_free': 463 | (__typeof__(*(ptr))) __cmpxchg_relaxed((ptr), \ | ^~~~~ include/linux/atomic.h:73:9: note: in expansion of macro 'arch_cmpxchg_relaxed' 73 | typeof(op##_relaxed(args)) __ret; \ | ^~ include/linux/atomic-arch-fallback.h:52:2: note: in expansion of macro '__atomic_op_fence' 52 | __atomic_op_fence(arch_cmpxchg, __VA_ARGS__) | ^~~~~~~~~~~~~~~~~ include/asm-generic/atomic-instrumented.h:1685:2: note: in expansion of macro 'arch_cmpxchg' 1685 | arch_cmpxchg(__ai_ptr, __VA_ARGS__); \ | ^~~~~~~~~~~~ drivers/gpu/drm/drm_lock.c:141:10: note: in expansion of macro 'cmpxchg' 141 | prev = cmpxchg(lock, old, new); | ^~~~~~~ arch/powerpc/include/asm/cmpxchg.h:432:25: note: expected 'void *' but argument is of type 'volatile unsigned int *' 432 | __cmpxchg_relaxed(void *ptr, unsigned long old, unsigned long new, | ~~~~~~^~~ 463 | (__typeof__(*(ptr))) __cmpxchg_relaxed((ptr), \ | ^~~~~ include/linux/atomic.h:75:10: note: in expansion of macro 'arch_cmpxchg_relaxed' 75 | __ret = op##_relaxed(args); \ | ^~ include/linux/atomic-arch-fallback.h:52:2: note: in expansion of macro '__atomic_op_fence' 52 | __atomic_op_fence(arch_cmpxchg, __VA_ARGS__) | ^~~~~~~~~~~~~~~~~ include/asm-generic/atomic-instrumented.h:1685:2: note: in expansion of macro 'arch_cmpxchg' 1685 | arch_cmpxchg(__ai_ptr, __VA_ARGS__); \ | ^~~~~~~~~~~~ drivers/gpu/drm/drm_lock.c:141:10: note: in expansion of macro 'cmpxchg' 141 | prev = cmpxchg(lock, old, new); | ^~~~~~~ arch/powerpc/include/asm/cmpxchg.h:432:25: note: expected 'void *' but argument is of type 'volatile unsigned int *' 432 | __cmpxchg_relaxed(void *ptr, unsigned long old, unsigned long new, | ~~~~~~^~~ drivers/gpu/drm/drm_lock.c: In function 'drm_legacy_idlelock_release': 463 | (__typeof__(*(ptr))) __cmpxchg_relaxed((ptr), \ | ^~~~~ include/linux/atomic.h:73:9: note: in expansion of macro 'arch_cmpxchg_relaxed' 73 | typeof(op##_relaxed(args)) __ret; \ | ^~ include/linux/atomic-arch-fallback.h:52:2: note: in expansion of macro '__atomic_op_fence' 52 | __atomic_op_fence(arch_cmpxchg, __VA_ARGS__) | ^~~~~~~~~~~~~~~~~ include/asm-generic/atomic-instrumented.h:1685:2: note: in expansion of macro 'arch_cmpxchg' 1685 | arch_cmpxchg(__ai_ptr, __VA_ARGS__); \ | ^~~~~~~~~~~~ drivers/gpu/drm/drm_lock.c:319:12: note: in expansion of macro 'cmpxchg' 319 | prev = cmpxchg(lock, old, DRM_KERNEL_CONTEXT); | ^~~~~~~ arch/powerpc/include/asm/cmpxchg.h:432:25: note: expected 'void *' but argument is of type 'volatile unsigned int *' 432 | __cmpxchg_relaxed(void *ptr, unsigned long old, unsigned long new, | ~~~~~~^~~ 463 | (__typeof__(*(ptr))) __cmpxchg_relaxed((ptr), \ | ^~~~~ include/linux/atomic.h:75:10: note: in expansion of macro 'arch_cmpxchg_relaxed' 75 | __ret = op##_relaxed(args); \ | ^~ include/linux/atomic-arch-fallback.h:52:2: note: in expansion of macro '__atomic_op_fence' 52 | __atomic_op_fence(arch_cmpxchg, __VA_ARGS__) | ^~~~~~~~~~~~~~~~~ include/asm-generic/atomic-instrumented.h:1685:2: note: in expansion of macro 'arch_cmpxchg' 1685 | arch_cmpxchg(__ai_ptr, __VA_ARGS__); \ | ^~~~~~~~~~~~ drivers/gpu/drm/drm_lock.c:319:12: note: in expansion of macro 'cmpxchg' 319 | prev = cmpxchg(lock, old, DRM_KERNEL_CONTEXT); | ^~~~~~~ arch/powerpc/include/asm/cmpxchg.h:432:25: note: expected 'void *' but argument is of type 'volatile unsigned int *' 432 | __cmpxchg_relaxed(void *ptr, unsigned long old, unsigned long new, | ~~~~~~^~~ vim +463 arch/powerpc/include/asm/cmpxchg.h 56c08e6d226c860 Boqun Feng 2015-12-15 450 9e1bec8fe216b07 Nicholas Piggin 2020-11-11 451 #define arch_cmpxchg_local(ptr, o, n) \ ae3a197e3d0bfe3 David Howells 2012-03-28 452 ({ \ ae3a197e3d0bfe3 David Howells 2012-03-28 453 __typeof__(*(ptr)) _o_ = (o); \ ae3a197e3d0bfe3 David Howells 2012-03-28 454 __typeof__(*(ptr)) _n_ = (n); \ ae3a197e3d0bfe3 David Howells 2012-03-28 455 (__typeof__(*(ptr))) __cmpxchg_local((ptr), (unsigned long)_o_, \ ae3a197e3d0bfe3 David Howells 2012-03-28 456 (unsigned long)_n_, sizeof(*(ptr))); \ ae3a197e3d0bfe3 David Howells 2012-03-28 457 }) ae3a197e3d0bfe3 David Howells 2012-03-28 458 9e1bec8fe216b07 Nicholas Piggin 2020-11-11 459 #define arch_cmpxchg_relaxed(ptr, o, n) \ 56c08e6d226c860 Boqun Feng 2015-12-15 460 ({ \ 56c08e6d226c860 Boqun Feng 2015-12-15 461 __typeof__(*(ptr)) _o_ = (o); \ 56c08e6d226c860 Boqun Feng 2015-12-15 462 __typeof__(*(ptr)) _n_ = (n); \ 56c08e6d226c860 Boqun Feng 2015-12-15 @463 (__typeof__(*(ptr))) __cmpxchg_relaxed((ptr), \ 56c08e6d226c860 Boqun Feng 2015-12-15 464 (unsigned long)_o_, (unsigned long)_n_, \ 56c08e6d226c860 Boqun Feng 2015-12-15 465 sizeof(*(ptr))); \ 56c08e6d226c860 Boqun Feng 2015-12-15 466 }) 56c08e6d226c860 Boqun Feng 2015-12-15 467 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org