From: Randy Dunlap rdunlap@infradead.org

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@intel.com Signed-off-by: Randy Dunlap rdunlap@infradead.org Cc: Evan Quan evan.quan@amd.com Cc: amd-gfx@lists.freedesktop.org Cc: Alex Deucher alexander.deucher@amd.com Cc: Vineet Gupta vgupta@synopsys.com Cc: linux-snps-arc@lists.infradead.org --- 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