tree: https://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git dev.2021.12.02a head: d157b802f05bd12cf40bef7a73ca6914b85c865e commit: 31a060491205cae6f710fa65d118580ee680619f [31/43] locking/barriers, kcsan: Add instrumentation for barriers config: alpha-allyesconfig (https://download.01.org/0day-ci/archive/20211204/202112041334.X44uWZXf-lk...) compiler: alpha-linux-gcc (GCC) 11.2.0 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://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git/com... git remote add paulmck-rcu https://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git git fetch --no-tags paulmck-rcu dev.2021.12.02a git checkout 31a060491205cae6f710fa65d118580ee680619f # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=alpha prepare 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 >>): arch/alpha/kernel/asm-offsets.c:15:6: warning: no previous prototype for 'foo' [-Wmissing-prototypes] 15 | void foo(void) | ^~~ In file included from arch/alpha/include/asm/barrier.h:21, from arch/alpha/include/asm/rwonce.h:10, from include/linux/compiler.h:266, from include/asm-generic/bug.h:5, from arch/alpha/include/asm/bug.h:23, from include/linux/bug.h:5, from include/linux/thread_info.h:13, from include/asm-generic/current.h:5, from ./arch/alpha/include/generated/asm/current.h:1, from include/linux/sched.h:12, from arch/alpha/kernel/asm-offsets.c:10: 70 | #define smp_rmb() do { kcsan_rmb(); __smp_rmb(); } while (0) | ^~~~~~~~~ arch/alpha/include/asm/pgtable.h:303:9: note: in expansion of macro 'smp_rmb' 303 | smp_rmb(); /* see above */ | ^~~~~~~ 70 | #define smp_rmb() do { kcsan_rmb(); __smp_rmb(); } while (0) | ^~~~~~~~~ arch/alpha/include/asm/pgtable.h:293:9: note: in expansion of macro 'smp_rmb' 293 | smp_rmb(); /* see above */ | ^~~~~~~ -- In file included from arch/alpha/include/asm/barrier.h:21, from arch/alpha/include/asm/rwonce.h:10, from include/linux/compiler.h:266, from include/linux/init.h:5, from drivers/gpu/drm/drm_dp_aux_bus.c:15: 70 | #define smp_rmb() do { kcsan_rmb(); __smp_rmb(); } while (0) | ^~~~~~~~~ arch/alpha/include/asm/pgtable.h:303:9: note: in expansion of macro 'smp_rmb' 303 | smp_rmb(); /* see above */ | ^~~~~~~ 70 | #define smp_rmb() do { kcsan_rmb(); __smp_rmb(); } while (0) | ^~~~~~~~~ arch/alpha/include/asm/pgtable.h:293:9: note: in expansion of macro 'smp_rmb' 293 | smp_rmb(); /* see above */ | ^~~~~~~ -- In file included from arch/alpha/include/asm/barrier.h:21, from arch/alpha/include/asm/rwonce.h:10, from include/linux/compiler.h:266, from include/asm-generic/bug.h:5, from arch/alpha/include/asm/bug.h:23, from include/linux/bug.h:5, from include/linux/mmdebug.h:5, from include/linux/gfp.h:5, from include/linux/slab.h:15, from drivers/gpu/drm/nouveau/include/nvif/os.h:6, from drivers/gpu/drm/nouveau/include/nvif/object.h:4, from drivers/gpu/drm/nouveau/include/nvif/client.h:5, from drivers/gpu/drm/nouveau/nvif/client.c:25: 70 | #define smp_rmb() do { kcsan_rmb(); __smp_rmb(); } while (0) | ^~~~~~~~~ arch/alpha/include/asm/pgtable.h:303:9: note: in expansion of macro 'smp_rmb' 303 | smp_rmb(); /* see above */ | ^~~~~~~ 70 | #define smp_rmb() do { kcsan_rmb(); __smp_rmb(); } while (0) | ^~~~~~~~~ arch/alpha/include/asm/pgtable.h:293:9: note: in expansion of macro 'smp_rmb' 293 | smp_rmb(); /* see above */ | ^~~~~~~ drivers/gpu/drm/nouveau/nvif/client.c: In function 'nvif_client_ctor': drivers/gpu/drm/nouveau/nvif/client.c:72:9: warning: 'strncpy' specified bound 32 equals destination size [-Wstringop-truncation] 72 | strncpy(args.name, name, sizeof(args.name)); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ -- In file included from arch/alpha/include/asm/barrier.h:21, from arch/alpha/include/asm/rwonce.h:10, from include/linux/compiler.h:266, from include/asm-generic/bug.h:5, from arch/alpha/include/asm/bug.h:23, from include/linux/bug.h:5, from include/linux/mmdebug.h:5, from include/linux/gfp.h:5, from include/linux/slab.h:15, from drivers/gpu/drm/nouveau/include/nvif/os.h:6, from drivers/gpu/drm/nouveau/include/nvkm/core/os.h:4, from drivers/gpu/drm/nouveau/include/nvkm/core/oclass.h:3, from drivers/gpu/drm/nouveau/include/nvkm/core/device.h:4, from drivers/gpu/drm/nouveau/nvkm/engine/device/priv.h:4, from drivers/gpu/drm/nouveau/nvkm/engine/device/user.c:25: 70 | #define smp_rmb() do { kcsan_rmb(); __smp_rmb(); } while (0) | ^~~~~~~~~ arch/alpha/include/asm/pgtable.h:303:9: note: in expansion of macro 'smp_rmb' 303 | smp_rmb(); /* see above */ | ^~~~~~~ 70 | #define smp_rmb() do { kcsan_rmb(); __smp_rmb(); } while (0) | ^~~~~~~~~ arch/alpha/include/asm/pgtable.h:293:9: note: in expansion of macro 'smp_rmb' 293 | smp_rmb(); /* see above */ | ^~~~~~~ drivers/gpu/drm/nouveau/nvkm/engine/device/user.c: In function 'nvkm_udevice_info': drivers/gpu/drm/nouveau/nvkm/engine/device/user.c:164:9: warning: 'strncpy' specified bound 16 equals destination size [-Wstringop-truncation] 164 | strncpy(args->v0.chip, device->chip->name, sizeof(args->v0.chip)); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/gpu/drm/nouveau/nvkm/engine/device/user.c:165:9: warning: 'strncpy' specified bound 64 equals destination size [-Wstringop-truncation] 165 | strncpy(args->v0.name, device->name, sizeof(args->v0.name)); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ -- drivers/gpu/drm/nouveau/nouveau_display.c: In function 'nouveau_framebuffer_new': drivers/gpu/drm/nouveau/nouveau_display.c:309:22: warning: variable 'width' set but not used [-Wunused-but-set-variable] 309 | unsigned int width, height, i; | ^~~~~ In file included from arch/alpha/include/asm/barrier.h:21, from arch/alpha/include/asm/rwonce.h:10, from include/linux/compiler.h:266, from include/linux/build_bug.h:5, from include/linux/bits.h:22, from include/linux/ioport.h:13, from include/linux/acpi.h:12, from include/linux/i2c.h:13, from include/drm/drm_crtc.h:28, from include/drm/drm_atomic.h:31, from drivers/gpu/drm/nouveau/nouveau_display.c:29: drivers/gpu/drm/nouveau/nouveau_display.c: At top level: 70 | #define smp_rmb() do { kcsan_rmb(); __smp_rmb(); } while (0) | ^~~~~~~~~ arch/alpha/include/asm/pgtable.h:303:9: note: in expansion of macro 'smp_rmb' 303 | smp_rmb(); /* see above */ | ^~~~~~~ 70 | #define smp_rmb() do { kcsan_rmb(); __smp_rmb(); } while (0) | ^~~~~~~~~ arch/alpha/include/asm/pgtable.h:293:9: note: in expansion of macro 'smp_rmb' 293 | smp_rmb(); /* see above */ | ^~~~~~~ -- drivers/gpu/drm/nouveau/dispnv50/disp.c: In function 'nv50_mstm_cleanup': drivers/gpu/drm/nouveau/dispnv50/disp.c:1390:13: warning: variable 'ret' set but not used [-Wunused-but-set-variable] 1390 | int ret; | ^~~ drivers/gpu/drm/nouveau/dispnv50/disp.c: In function 'nv50_mstm_prepare': drivers/gpu/drm/nouveau/dispnv50/disp.c:1414:13: warning: variable 'ret' set but not used [-Wunused-but-set-variable] 1414 | int ret; | ^~~ drivers/gpu/drm/nouveau/dispnv50/disp.c: At top level: drivers/gpu/drm/nouveau/dispnv50/disp.c:2692:1: warning: no previous prototype for 'nv50_display_create' [-Wmissing-prototypes] 2692 | nv50_display_create(struct drm_device *dev) | ^~~~~~~~~~~~~~~~~~~ In file included from arch/alpha/include/asm/barrier.h:21, from arch/alpha/include/asm/rwonce.h:10, from include/linux/compiler.h:266, from include/linux/build_bug.h:5, from include/linux/container_of.h:5, from include/linux/list.h:5, from include/linux/timer.h:5, from include/linux/workqueue.h:9, from drivers/gpu/drm/nouveau/dispnv50/disp.h:3, from drivers/gpu/drm/nouveau/dispnv50/disp.c:24: 70 | #define smp_rmb() do { kcsan_rmb(); __smp_rmb(); } while (0) | ^~~~~~~~~ arch/alpha/include/asm/pgtable.h:303:9: note: in expansion of macro 'smp_rmb' 303 | smp_rmb(); /* see above */ | ^~~~~~~ 70 | #define smp_rmb() do { kcsan_rmb(); __smp_rmb(); } while (0) | ^~~~~~~~~ arch/alpha/include/asm/pgtable.h:293:9: note: in expansion of macro 'smp_rmb' 293 | smp_rmb(); /* see above */ | ^~~~~~~ -- drivers/gpu/drm/nouveau/dispnv50/headc57d.c:173:1: warning: no previous prototype for 'headc57d_olut' [-Wmissing-prototypes] 173 | headc57d_olut(struct nv50_head *head, struct nv50_head_atom *asyh, int size) | ^~~~~~~~~~~~~ In file included from arch/alpha/include/asm/barrier.h:21, from arch/alpha/include/asm/rwonce.h:10, from include/linux/compiler.h:266, from include/linux/build_bug.h:5, from include/linux/container_of.h:5, from include/linux/list.h:5, from include/linux/timer.h:5, from include/linux/workqueue.h:9, from drivers/gpu/drm/nouveau/dispnv50/head.h:4, from drivers/gpu/drm/nouveau/dispnv50/headc57d.c:22: 70 | #define smp_rmb() do { kcsan_rmb(); __smp_rmb(); } while (0) | ^~~~~~~~~ arch/alpha/include/asm/pgtable.h:303:9: note: in expansion of macro 'smp_rmb' 303 | smp_rmb(); /* see above */ | ^~~~~~~ 70 | #define smp_rmb() do { kcsan_rmb(); __smp_rmb(); } while (0) | ^~~~~~~~~ arch/alpha/include/asm/pgtable.h:293:9: note: in expansion of macro 'smp_rmb' 293 | smp_rmb(); /* see above */ | ^~~~~~~ -- drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c:870:6: warning: no previous prototype for 'amdgpu_ras_mca_query_error_status' [-Wmissing-prototypes] 870 | void amdgpu_ras_mca_query_error_status(struct amdgpu_device *adev, | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ In file included from arch/alpha/include/asm/barrier.h:21, from arch/alpha/include/asm/rwonce.h:10, from include/linux/compiler.h:266, from include/linux/build_bug.h:5, from include/linux/container_of.h:5, from include/linux/list.h:5, from include/linux/wait.h:7, from include/linux/wait_bit.h:8, from include/linux/fs.h:6, from include/linux/debugfs.h:15, from drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c:24: 70 | #define smp_rmb() do { kcsan_rmb(); __smp_rmb(); } while (0) | ^~~~~~~~~ arch/alpha/include/asm/pgtable.h:303:9: note: in expansion of macro 'smp_rmb' 303 | smp_rmb(); /* see above */ | ^~~~~~~ 70 | #define smp_rmb() do { kcsan_rmb(); __smp_rmb(); } while (0) | ^~~~~~~~~ arch/alpha/include/asm/pgtable.h:293:9: note: in expansion of macro 'smp_rmb' 293 | smp_rmb(); /* see above */ | ^~~~~~~ -- drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c:521:6: warning: no previous prototype for 'release_psp_cmd_buf' [-Wmissing-prototypes] 521 | void release_psp_cmd_buf(struct psp_context *psp) | ^~~~~~~~~~~~~~~~~~~ In file included from arch/alpha/include/asm/barrier.h:21, from arch/alpha/include/asm/rwonce.h:10, from include/linux/compiler.h:266, from include/linux/firmware.h:6, from drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c:26: 70 | #define smp_rmb() do { kcsan_rmb(); __smp_rmb(); } while (0) | ^~~~~~~~~ arch/alpha/include/asm/pgtable.h:303:9: note: in expansion of macro 'smp_rmb' 303 | smp_rmb(); /* see above */ | ^~~~~~~ 70 | #define smp_rmb() do { kcsan_rmb(); __smp_rmb(); } while (0) | ^~~~~~~~~ arch/alpha/include/asm/pgtable.h:293:9: note: in expansion of macro 'smp_rmb' 293 | smp_rmb(); /* see above */ | ^~~~~~~ -- drivers/gpu/drm/amd/amdgpu/amdgpu_vkms.c:399:5: warning: no previous prototype for 'amdgpu_vkms_output_init' [-Wmissing-prototypes] 399 | int amdgpu_vkms_output_init(struct drm_device *dev, | ^~~~~~~~~~~~~~~~~~~~~~~ In file included from arch/alpha/include/asm/barrier.h:21, from arch/alpha/include/asm/rwonce.h:10, from include/linux/compiler.h:266, from include/linux/build_bug.h:5, from include/linux/bits.h:22, from include/linux/ioport.h:13, from include/linux/acpi.h:12, from include/linux/i2c.h:13, from include/drm/drm_crtc.h:28, from include/drm/drm_atomic_helper.h:31, from drivers/gpu/drm/amd/amdgpu/amdgpu_vkms.c:3: 70 | #define smp_rmb() do { kcsan_rmb(); __smp_rmb(); } while (0) | ^~~~~~~~~ arch/alpha/include/asm/pgtable.h:303:9: note: in expansion of macro 'smp_rmb' 303 | smp_rmb(); /* see above */ | ^~~~~~~ 70 | #define smp_rmb() do { kcsan_rmb(); __smp_rmb(); } while (0) | ^~~~~~~~~ arch/alpha/include/asm/pgtable.h:293:9: note: in expansion of macro 'smp_rmb' 293 | smp_rmb(); /* see above */ | ^~~~~~~ -- In file included from drivers/gpu/drm/amd/amdgpu/../display/dmub/dmub_srv.h:67, from drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm.c:35: drivers/gpu/drm/amd/amdgpu/../display/dmub/inc/dmub_cmd.h: In function 'dmub_rb_flush_pending': drivers/gpu/drm/amd/amdgpu/../display/dmub/inc/dmub_cmd.h:2893:26: warning: variable 'temp' set but not used [-Wunused-but-set-variable] 2893 | uint64_t temp; | ^~~~ drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm.c: At top level: drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm.c:11459:5: warning: no previous prototype for 'amdgpu_dm_set_dmub_async_sync_status' [-Wmissing-prototypes] 11459 | int amdgpu_dm_set_dmub_async_sync_status(bool is_cmd_aux, struct dc_context *ctx, | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ In file included from arch/alpha/include/asm/barrier.h:21, from arch/alpha/include/asm/rwonce.h:10, from include/linux/compiler.h:266, from include/linux/init.h:5, from include/linux/kgdb.h:17, from drivers/gpu/drm/amd/amdgpu/../display/dc/os_types.h:30, from drivers/gpu/drm/amd/amdgpu/../display/dc/dm_services_types.h:29, from drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm.c:29: 70 | #define smp_rmb() do { kcsan_rmb(); __smp_rmb(); } while (0) | ^~~~~~~~~ arch/alpha/include/asm/pgtable.h:303:9: note: in expansion of macro 'smp_rmb' 303 | smp_rmb(); /* see above */ | ^~~~~~~ 70 | #define smp_rmb() do { kcsan_rmb(); __smp_rmb(); } while (0) | ^~~~~~~~~ arch/alpha/include/asm/pgtable.h:293:9: note: in expansion of macro 'smp_rmb' 293 | smp_rmb(); /* see above */ | ^~~~~~~ .. vim +70 include/asm-generic/barrier.h 68 69 #ifndef smp_rmb 71 #endif 72 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org