From: Randy Dunlap <rdunlap@xxxxxxxxxxxxx> arch/arc/ implements BUG_ON() with BUG(). ARC has its own BUG() function and that function uses pr_warn() as part of its implementation. Several (8) files in amd/powerplay/ #undef various pr_xyz() functions so that they won't be used by these drivers, since dev_() functions are preferred here and the #undefs make the pr_() functions unavailable. Hence the following build errors are reported in ARC builds: ../drivers/gpu/drm/amd/amdgpu/../powerplay/navi10_ppt.c: In function 'navi10_fill_i2c_req': ../arch/arc/include/asm/bug.h:24:2: error: implicit declaration of function 'pr_warn'; did you mean 'drm_warn'? [-Werror=implicit-function-declaration] ../drivers/gpu/drm/amd/amdgpu/../powerplay/sienna_cichlid_ppt.c: In function 'sienna_cichlid_fill_i2c_req': ../arch/arc/include/asm/bug.h:24:2: error: implicit declaration of function 'pr_warn'; did you mean 'drm_warn'? [-Werror=implicit-function-declaration] Fixes: 55084d7f4022 ("drm/amd/powerplay: forbid to use pr_err/warn/info/debug") Reported-by: kernel test robot <lkp@xxxxxxxxx> Signed-off-by: Randy Dunlap <rdunlap@xxxxxxxxxxxxx> Cc: Evan Quan <evan.quan@xxxxxxx> Cc: amd-gfx@xxxxxxxxxxxxxxxxxxxxx Cc: Alex Deucher <alexander.deucher@xxxxxxx> Cc: Vineet Gupta <vgupta@xxxxxxxxxxxx> Cc: linux-snps-arc@xxxxxxxxxxxxxxxxxxx --- Another alternative is for amd/powerplay/ drivers not to use BUG() or BUG_ON(). A third alternative is to ask the ARC developers to implement BUG() without using any pr_() functions. drivers/gpu/drm/amd/powerplay/navi10_ppt.c | 2 +- drivers/gpu/drm/amd/powerplay/sienna_cichlid_ppt.c | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) --- lnx-59-rc7.orig/drivers/gpu/drm/amd/powerplay/navi10_ppt.c +++ lnx-59-rc7/drivers/gpu/drm/amd/powerplay/navi10_ppt.c @@ -52,7 +52,7 @@ * They are more MGPU friendly. */ #undef pr_err -#undef pr_warn +//#undef pr_warn #undef pr_info #undef pr_debug --- lnx-59-rc7.orig/drivers/gpu/drm/amd/powerplay/sienna_cichlid_ppt.c +++ lnx-59-rc7/drivers/gpu/drm/amd/powerplay/sienna_cichlid_ppt.c @@ -54,7 +54,7 @@ * They are more MGPU friendly. */ #undef pr_err -#undef pr_warn +//#undef pr_warn #undef pr_info #undef pr_debug _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel