drivers/gpu/drm/amd/amdgpu/../pm/powerplay/hwmgr/processpptables.c:841:6: warning: performing pointer subtraction with a null pointer has undefined behavior

From: kernel test robot
Date: Wed Jul 21 2021 - 02:54:21 EST

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Hi Dave,

First bad commit (maybe != root cause):

tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 8cae8cd89f05f6de223d63e6d15e31c8ba9cf53b
commit: 0c8d22fcae2f9590a07b000e1724f665820b77f7 Merge tag 'amd-drm-next-5.10-2020-09-03' of git://people.freedesktop.org/~agd5f/linux into drm-next
date: 11 months ago
config: powerpc64-randconfig-r012-20210720 (attached as .config)
compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project c781eb153bfbd1b52b03efe34f56bbeccbb8aba6)
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
# install powerpc64 cross compiling tool for clang build
# apt-get install binutils-powerpc64-linux-gnu
# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=0c8d22fcae2f9590a07b000e1724f665820b77f7
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout 0c8d22fcae2f9590a07b000e1724f665820b77f7
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=powerpc64

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@xxxxxxxxx>

All warnings (new ones prefixed by >>):

In file included from drivers/gpu/drm/amd/amdgpu/../pm/powerplay/hwmgr/processpptables.c:23:
In file included from drivers/gpu/drm/amd/amdgpu/../pm/inc/pp_debug.h:34:
In file included from include/linux/kernel.h:12:
In file included from include/linux/bitops.h:29:
In file included from arch/powerpc/include/asm/bitops.h:62:
arch/powerpc/include/asm/barrier.h:49:9: warning: '__lwsync' macro redefined [-Wmacro-redefined]
#define __lwsync() __asm__ __volatile__ (stringify_in_c(LWSYNC) : : :"memory")
^
<built-in>:310:9: note: previous definition is here
#define __lwsync __builtin_ppc_lwsync
^
>> drivers/gpu/drm/amd/amdgpu/../pm/powerplay/hwmgr/processpptables.c:841:6: warning: performing pointer subtraction with a null pointer has undefined behavior [-Wnull-pointer-subtraction]
GetIndexIntoMasterTable(DATA, PowerPlayInfo),
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../include/atombios.h:7133:132: note: expanded from macro 'GetIndexIntoMasterTable'
#define GetIndexIntoMasterTable(MasterOrData, FieldName) (((char*)(&((ATOM_MASTER_LIST_OF_##MasterOrData##_TABLES*)0)->FieldName)-(char*)0)/sizeof(USHORT))
^~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../pm/powerplay/hwmgr/processpptables.c:1089:5: warning: performing pointer subtraction with a null pointer has undefined behavior [-Wnull-pointer-subtraction]
GetIndexIntoMasterTable(DATA, FirmwareInfo),
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../include/atombios.h:7133:132: note: expanded from macro 'GetIndexIntoMasterTable'
#define GetIndexIntoMasterTable(MasterOrData, FieldName) (((char*)(&((ATOM_MASTER_LIST_OF_##MasterOrData##_TABLES*)0)->FieldName)-(char*)0)/sizeof(USHORT))
^~~~~~~~~
3 warnings generated.
--
In file included from drivers/gpu/drm/amd/amdgpu/../pm/powerplay/hwmgr/smu8_hwmgr.c:23:
In file included from drivers/gpu/drm/amd/amdgpu/../pm/inc/pp_debug.h:34:
In file included from include/linux/kernel.h:12:
In file included from include/linux/bitops.h:29:
In file included from arch/powerpc/include/asm/bitops.h:62:
arch/powerpc/include/asm/barrier.h:49:9: warning: '__lwsync' macro redefined [-Wmacro-redefined]
#define __lwsync() __asm__ __volatile__ (stringify_in_c(LWSYNC) : : :"memory")
^
<built-in>:310:9: note: previous definition is here
#define __lwsync __builtin_ppc_lwsync
^
>> drivers/gpu/drm/amd/amdgpu/../pm/powerplay/hwmgr/smu8_hwmgr.c:319:4: warning: performing pointer subtraction with a null pointer has undefined behavior [-Wnull-pointer-subtraction]
GetIndexIntoMasterTable(DATA, IntegratedSystemInfo),
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../include/atombios.h:7133:132: note: expanded from macro 'GetIndexIntoMasterTable'
#define GetIndexIntoMasterTable(MasterOrData, FieldName) (((char*)(&((ATOM_MASTER_LIST_OF_##MasterOrData##_TABLES*)0)->FieldName)-(char*)0)/sizeof(USHORT))
^~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../pm/powerplay/hwmgr/smu8_hwmgr.c:2044:5: warning: no previous prototype for function 'smu8_init_function_pointers' [-Wmissing-prototypes]
int smu8_init_function_pointers(struct pp_hwmgr *hwmgr)
^
drivers/gpu/drm/amd/amdgpu/../pm/powerplay/hwmgr/smu8_hwmgr.c:2044:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
int smu8_init_function_pointers(struct pp_hwmgr *hwmgr)
^
static
3 warnings generated.
--
In file included from drivers/gpu/drm/amd/amdgpu/../pm/powerplay/hwmgr/process_pptables_v1_0.c:23:
In file included from drivers/gpu/drm/amd/amdgpu/../pm/inc/pp_debug.h:34:
In file included from include/linux/kernel.h:12:
In file included from include/linux/bitops.h:29:
In file included from arch/powerpc/include/asm/bitops.h:62:
arch/powerpc/include/asm/barrier.h:49:9: warning: '__lwsync' macro redefined [-Wmacro-redefined]
#define __lwsync() __asm__ __volatile__ (stringify_in_c(LWSYNC) : : :"memory")
^
<built-in>:310:9: note: previous definition is here
#define __lwsync __builtin_ppc_lwsync
^
>> drivers/gpu/drm/amd/amdgpu/../pm/powerplay/hwmgr/process_pptables_v1_0.c:136:14: warning: performing pointer subtraction with a null pointer has undefined behavior [-Wnull-pointer-subtraction]
int index = GetIndexIntoMasterTable(DATA, PowerPlayInfo);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../include/atombios.h:7133:132: note: expanded from macro 'GetIndexIntoMasterTable'
#define GetIndexIntoMasterTable(MasterOrData, FieldName) (((char*)(&((ATOM_MASTER_LIST_OF_##MasterOrData##_TABLES*)0)->FieldName)-(char*)0)/sizeof(USHORT))
^~~~~~~~~
2 warnings generated.
--
In file included from drivers/gpu/drm/amd/amdgpu/../pm/powerplay/hwmgr/ppatomctrl.c:23:
In file included from drivers/gpu/drm/amd/amdgpu/../pm/inc/pp_debug.h:34:
In file included from include/linux/kernel.h:12:
In file included from include/linux/bitops.h:29:
In file included from arch/powerpc/include/asm/bitops.h:62:
arch/powerpc/include/asm/barrier.h:49:9: warning: '__lwsync' macro redefined [-Wmacro-redefined]
#define __lwsync() __asm__ __volatile__ (stringify_in_c(LWSYNC) : : :"memory")
^
<built-in>:310:9: note: previous definition is here
#define __lwsync __builtin_ppc_lwsync
^
In file included from drivers/gpu/drm/amd/amdgpu/../pm/powerplay/hwmgr/ppatomctrl.c:31:
drivers/gpu/drm/amd/amdgpu/../pm/powerplay/hwmgr/ppevvmath.h:336:7: warning: variable 'X_LessThanOne' set but not used [-Wunused-but-set-variable]
bool X_LessThanOne, Y_LessThanOne;
^
drivers/gpu/drm/amd/amdgpu/../pm/powerplay/hwmgr/ppevvmath.h:336:22: warning: variable 'Y_LessThanOne' set but not used [-Wunused-but-set-variable]
bool X_LessThanOne, Y_LessThanOne;
^
>> drivers/gpu/drm/amd/amdgpu/../pm/powerplay/hwmgr/ppatomctrl.c:145:5: warning: performing pointer subtraction with a null pointer has undefined behavior [-Wnull-pointer-subtraction]
GetIndexIntoMasterTable(DATA, VRAM_Info), &size, &frev, &crev);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../include/atombios.h:7133:132: note: expanded from macro 'GetIndexIntoMasterTable'
#define GetIndexIntoMasterTable(MasterOrData, FieldName) (((char*)(&((ATOM_MASTER_LIST_OF_##MasterOrData##_TABLES*)0)->FieldName)-(char*)0)/sizeof(USHORT))
^~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../pm/powerplay/hwmgr/ppatomctrl.c:191:4: warning: performing pointer subtraction with a null pointer has undefined behavior [-Wnull-pointer-subtraction]
GetIndexIntoMasterTable(COMMAND, DynamicMemorySettings),
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../include/atombios.h:7133:132: note: expanded from macro 'GetIndexIntoMasterTable'
#define GetIndexIntoMasterTable(MasterOrData, FieldName) (((char*)(&((ATOM_MASTER_LIST_OF_##MasterOrData##_TABLES*)0)->FieldName)-(char*)0)/sizeof(USHORT))
^~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../pm/powerplay/hwmgr/ppatomctrl.c:203:14: warning: performing pointer subtraction with a null pointer has undefined behavior [-Wnull-pointer-subtraction]
int index = GetIndexIntoMasterTable(DATA, VoltageObjectInfo);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../include/atombios.h:7133:132: note: expanded from macro 'GetIndexIntoMasterTable'
#define GetIndexIntoMasterTable(MasterOrData, FieldName) (((char*)(&((ATOM_MASTER_LIST_OF_##MasterOrData##_TABLES*)0)->FieldName)-(char*)0)/sizeof(USHORT))
^~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../pm/powerplay/hwmgr/ppatomctrl.c:261:4: warning: performing pointer subtraction with a null pointer has undefined behavior [-Wnull-pointer-subtraction]
GetIndexIntoMasterTable(COMMAND, ComputeMemoryClockParam),
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../include/atombios.h:7133:132: note: expanded from macro 'GetIndexIntoMasterTable'
#define GetIndexIntoMasterTable(MasterOrData, FieldName) (((char*)(&((ATOM_MASTER_LIST_OF_##MasterOrData##_TABLES*)0)->FieldName)-(char*)0)/sizeof(USHORT))
^~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../pm/powerplay/hwmgr/ppatomctrl.c:308:4: warning: performing pointer subtraction with a null pointer has undefined behavior [-Wnull-pointer-subtraction]
GetIndexIntoMasterTable(COMMAND, ComputeMemoryClockParam),
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../include/atombios.h:7133:132: note: expanded from macro 'GetIndexIntoMasterTable'
#define GetIndexIntoMasterTable(MasterOrData, FieldName) (((char*)(&((ATOM_MASTER_LIST_OF_##MasterOrData##_TABLES*)0)->FieldName)-(char*)0)/sizeof(USHORT))
^~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../pm/powerplay/hwmgr/ppatomctrl.c:329:4: warning: performing pointer subtraction with a null pointer has undefined behavior [-Wnull-pointer-subtraction]
GetIndexIntoMasterTable(COMMAND, ComputeMemoryClockParam),
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../include/atombios.h:7133:132: note: expanded from macro 'GetIndexIntoMasterTable'
#define GetIndexIntoMasterTable(MasterOrData, FieldName) (((char*)(&((ATOM_MASTER_LIST_OF_##MasterOrData##_TABLES*)0)->FieldName)-(char*)0)/sizeof(USHORT))
^~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../pm/powerplay/hwmgr/ppatomctrl.c:359:4: warning: performing pointer subtraction with a null pointer has undefined behavior [-Wnull-pointer-subtraction]
GetIndexIntoMasterTable(COMMAND, ComputeMemoryEnginePLL),
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../include/atombios.h:7133:132: note: expanded from macro 'GetIndexIntoMasterTable'
#define GetIndexIntoMasterTable(MasterOrData, FieldName) (((char*)(&((ATOM_MASTER_LIST_OF_##MasterOrData##_TABLES*)0)->FieldName)-(char*)0)/sizeof(USHORT))
^~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../pm/powerplay/hwmgr/ppatomctrl.c:383:4: warning: performing pointer subtraction with a null pointer has undefined behavior [-Wnull-pointer-subtraction]
GetIndexIntoMasterTable(COMMAND, ComputeMemoryEnginePLL),
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../include/atombios.h:7133:132: note: expanded from macro 'GetIndexIntoMasterTable'
#define GetIndexIntoMasterTable(MasterOrData, FieldName) (((char*)(&((ATOM_MASTER_LIST_OF_##MasterOrData##_TABLES*)0)->FieldName)-(char*)0)/sizeof(USHORT))
^~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../pm/powerplay/hwmgr/ppatomctrl.c:420:4: warning: performing pointer subtraction with a null pointer has undefined behavior [-Wnull-pointer-subtraction]
GetIndexIntoMasterTable(COMMAND, ComputeMemoryEnginePLL),
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../include/atombios.h:7133:132: note: expanded from macro 'GetIndexIntoMasterTable'
#define GetIndexIntoMasterTable(MasterOrData, FieldName) (((char*)(&((ATOM_MASTER_LIST_OF_##MasterOrData##_TABLES*)0)->FieldName)-(char*)0)/sizeof(USHORT))
^~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../pm/powerplay/hwmgr/ppatomctrl.c:453:4: warning: performing pointer subtraction with a null pointer has undefined behavior [-Wnull-pointer-subtraction]
GetIndexIntoMasterTable(COMMAND, ComputeMemoryEnginePLL),
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../include/atombios.h:7133:132: note: expanded from macro 'GetIndexIntoMasterTable'
#define GetIndexIntoMasterTable(MasterOrData, FieldName) (((char*)(&((ATOM_MASTER_LIST_OF_##MasterOrData##_TABLES*)0)->FieldName)-(char*)0)/sizeof(USHORT))
^~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../pm/powerplay/hwmgr/ppatomctrl.c:490:4: warning: performing pointer subtraction with a null pointer has undefined behavior [-Wnull-pointer-subtraction]
GetIndexIntoMasterTable(DATA, FirmwareInfo),
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../include/atombios.h:7133:132: note: expanded from macro 'GetIndexIntoMasterTable'
#define GetIndexIntoMasterTable(MasterOrData, FieldName) (((char*)(&((ATOM_MASTER_LIST_OF_##MasterOrData##_TABLES*)0)->FieldName)-(char*)0)/sizeof(USHORT))
^~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../pm/powerplay/hwmgr/ppatomctrl.c:610:5: warning: performing pointer subtraction with a null pointer has undefined behavior [-Wnull-pointer-subtraction]
GetIndexIntoMasterTable(DATA, GPIO_Pin_LUT),
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../include/atombios.h:7133:132: note: expanded from macro 'GetIndexIntoMasterTable'
#define GetIndexIntoMasterTable(MasterOrData, FieldName) (((char*)(&((ATOM_MASTER_LIST_OF_##MasterOrData##_TABLES*)0)->FieldName)-(char*)0)/sizeof(USHORT))
^~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../pm/powerplay/hwmgr/ppatomctrl.c:678:6: warning: performing pointer subtraction with a null pointer has undefined behavior [-Wnull-pointer-subtraction]
GetIndexIntoMasterTable(DATA, ASIC_ProfilingInfo),
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../include/atombios.h:7133:132: note: expanded from macro 'GetIndexIntoMasterTable'
#define GetIndexIntoMasterTable(MasterOrData, FieldName) (((char*)(&((ATOM_MASTER_LIST_OF_##MasterOrData##_TABLES*)0)->FieldName)-(char*)0)/sizeof(USHORT))
^~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../pm/powerplay/hwmgr/ppatomctrl.c:744:4: warning: performing pointer subtraction with a null pointer has undefined behavior [-Wnull-pointer-subtraction]
GetIndexIntoMasterTable(COMMAND, ReadEfuseValue),
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../include/atombios.h:7133:132: note: expanded from macro 'GetIndexIntoMasterTable'
#define GetIndexIntoMasterTable(MasterOrData, FieldName) (((char*)(&((ATOM_MASTER_LIST_OF_##MasterOrData##_TABLES*)0)->FieldName)-(char*)0)/sizeof(USHORT))
^~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../pm/powerplay/hwmgr/ppatomctrl.c:765:4: warning: performing pointer subtraction with a null pointer has undefined behavior [-Wnull-pointer-subtraction]
GetIndexIntoMasterTable(COMMAND, ReadEfuseValue),
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../include/atombios.h:7133:132: note: expanded from macro 'GetIndexIntoMasterTable'
#define GetIndexIntoMasterTable(MasterOrData, FieldName) (((char*)(&((ATOM_MASTER_LIST_OF_##MasterOrData##_TABLES*)0)->FieldName)-(char*)0)/sizeof(USHORT))
^~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../pm/powerplay/hwmgr/ppatomctrl.c:785:4: warning: performing pointer subtraction with a null pointer has undefined behavior [-Wnull-pointer-subtraction]
GetIndexIntoMasterTable(COMMAND, ReadEfuseValue),
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../include/atombios.h:7133:132: note: expanded from macro 'GetIndexIntoMasterTable'
#define GetIndexIntoMasterTable(MasterOrData, FieldName) (((char*)(&((ATOM_MASTER_LIST_OF_##MasterOrData##_TABLES*)0)->FieldName)-(char*)0)/sizeof(USHORT))
^~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../pm/powerplay/hwmgr/ppatomctrl.c:806:4: warning: performing pointer subtraction with a null pointer has undefined behavior [-Wnull-pointer-subtraction]
GetIndexIntoMasterTable(COMMAND, ReadEfuseValue),
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../include/atombios.h:7133:132: note: expanded from macro 'GetIndexIntoMasterTable'
#define GetIndexIntoMasterTable(MasterOrData, FieldName) (((char*)(&((ATOM_MASTER_LIST_OF_##MasterOrData##_TABLES*)0)->FieldName)-(char*)0)/sizeof(USHORT))
--
In file included from drivers/gpu/drm/amd/amdgpu/../pm/powerplay/hwmgr/ppatomfwctrl.c:24:
In file included from drivers/gpu/drm/amd/amdgpu/../pm/powerplay/hwmgr/ppatomfwctrl.h:27:
In file included from drivers/gpu/drm/amd/amdgpu/../pm/inc/hwmgr.h:26:
In file included from include/linux/seq_file.h:7:
In file included from include/linux/bug.h:5:
In file included from arch/powerpc/include/asm/bug.h:109:
In file included from include/asm-generic/bug.h:20:
In file included from include/linux/kernel.h:12:
In file included from include/linux/bitops.h:29:
In file included from arch/powerpc/include/asm/bitops.h:62:
arch/powerpc/include/asm/barrier.h:49:9: warning: '__lwsync' macro redefined [-Wmacro-redefined]
#define __lwsync() __asm__ __volatile__ (stringify_in_c(LWSYNC) : : :"memory")
^
<built-in>:310:9: note: previous definition is here
#define __lwsync __builtin_ppc_lwsync
^
>> drivers/gpu/drm/amd/amdgpu/../pm/powerplay/hwmgr/ppatomfwctrl.c:60:8: warning: performing pointer subtraction with a null pointer has undefined behavior [-Wnull-pointer-subtraction]
idx = GetIndexIntoMasterDataTable(voltageobject_info);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../pm/powerplay/hwmgr/ppatomfwctrl.h:34:74: note: expanded from macro 'GetIndexIntoMasterDataTable'
(((char*)(&((struct atom_master_list_of_data_tables_v2_1*)0)->FieldName)-(char*)0)/sizeof(uint16_t))
^~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../pm/powerplay/hwmgr/ppatomfwctrl.c:168:8: warning: performing pointer subtraction with a null pointer has undefined behavior [-Wnull-pointer-subtraction]
idx = GetIndexIntoMasterDataTable(gpio_pin_lut);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../pm/powerplay/hwmgr/ppatomfwctrl.h:34:74: note: expanded from macro 'GetIndexIntoMasterDataTable'
(((char*)(&((struct atom_master_list_of_data_tables_v2_1*)0)->FieldName)-(char*)0)/sizeof(uint16_t))
^~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../pm/powerplay/hwmgr/ppatomfwctrl.c:258:8: warning: performing pointer subtraction with a null pointer has undefined behavior [-Wnull-pointer-subtraction]
idx = GetIndexIntoMasterCmdTable(computegpuclockparam);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../pm/powerplay/hwmgr/ppatomfwctrl.h:32:80: note: expanded from macro 'GetIndexIntoMasterCmdTable'
(((char*)(&((struct atom_master_list_of_command_functions_v2_1*)0)->FieldName)-(char*)0)/sizeof(uint16_t))
^~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../pm/powerplay/hwmgr/ppatomfwctrl.c:285:8: warning: performing pointer subtraction with a null pointer has undefined behavior [-Wnull-pointer-subtraction]
idx = GetIndexIntoMasterDataTable(asic_profiling_info);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../pm/powerplay/hwmgr/ppatomfwctrl.h:34:74: note: expanded from macro 'GetIndexIntoMasterDataTable'
(((char*)(&((struct atom_master_list_of_data_tables_v2_1*)0)->FieldName)-(char*)0)/sizeof(uint16_t))
^~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../pm/powerplay/hwmgr/ppatomfwctrl.c:469:8: warning: performing pointer subtraction with a null pointer has undefined behavior [-Wnull-pointer-subtraction]
idx = GetIndexIntoMasterDataTable(smu_info);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../pm/powerplay/hwmgr/ppatomfwctrl.h:34:74: note: expanded from macro 'GetIndexIntoMasterDataTable'
(((char*)(&((struct atom_master_list_of_data_tables_v2_1*)0)->FieldName)-(char*)0)/sizeof(uint16_t))
^~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../pm/powerplay/hwmgr/ppatomfwctrl.c:505:7: warning: performing pointer subtraction with a null pointer has undefined behavior [-Wnull-pointer-subtraction]
ix = GetIndexIntoMasterCmdTable(getsmuclockinfo);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../pm/powerplay/hwmgr/ppatomfwctrl.h:32:80: note: expanded from macro 'GetIndexIntoMasterCmdTable'
(((char*)(&((struct atom_master_list_of_command_functions_v2_1*)0)->FieldName)-(char*)0)/sizeof(uint16_t))
^~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../pm/powerplay/hwmgr/ppatomfwctrl.c:594:7: warning: performing pointer subtraction with a null pointer has undefined behavior [-Wnull-pointer-subtraction]
ix = GetIndexIntoMasterDataTable(firmwareinfo);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../pm/powerplay/hwmgr/ppatomfwctrl.h:34:74: note: expanded from macro 'GetIndexIntoMasterDataTable'
(((char*)(&((struct atom_master_list_of_data_tables_v2_1*)0)->FieldName)-(char*)0)/sizeof(uint16_t))
^~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../pm/powerplay/hwmgr/ppatomfwctrl.c:626:7: warning: performing pointer subtraction with a null pointer has undefined behavior [-Wnull-pointer-subtraction]
ix = GetIndexIntoMasterDataTable(smc_dpm_info);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../pm/powerplay/hwmgr/ppatomfwctrl.h:34:74: note: expanded from macro 'GetIndexIntoMasterDataTable'
(((char*)(&((struct atom_master_list_of_data_tables_v2_1*)0)->FieldName)-(char*)0)/sizeof(uint16_t))
^~~~~~~~~
9 warnings generated.
--
In file included from drivers/gpu/drm/amd/amdgpu/../pm/powerplay/hwmgr/smu7_hwmgr.c:23:
In file included from drivers/gpu/drm/amd/amdgpu/../pm/inc/pp_debug.h:34:
In file included from include/linux/kernel.h:12:
In file included from include/linux/bitops.h:29:
In file included from arch/powerpc/include/asm/bitops.h:62:
arch/powerpc/include/asm/barrier.h:49:9: warning: '__lwsync' macro redefined [-Wmacro-redefined]
#define __lwsync() __asm__ __volatile__ (stringify_in_c(LWSYNC) : : :"memory")
^
<built-in>:310:9: note: previous definition is here
#define __lwsync __builtin_ppc_lwsync
^
>> drivers/gpu/drm/amd/amdgpu/../pm/powerplay/hwmgr/smu7_hwmgr.c:3075:14: warning: performing pointer subtraction with a null pointer has undefined behavior [-Wnull-pointer-subtraction]
int index = GetIndexIntoMasterTable(DATA, FirmwareInfo);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../include/atombios.h:7133:132: note: expanded from macro 'GetIndexIntoMasterTable'
#define GetIndexIntoMasterTable(MasterOrData, FieldName) (((char*)(&((ATOM_MASTER_LIST_OF_##MasterOrData##_TABLES*)0)->FieldName)-(char*)0)/sizeof(USHORT))
^~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../pm/powerplay/hwmgr/smu7_hwmgr.c:5207:5: warning: no previous prototype for function 'smu7_init_function_pointers' [-Wmissing-prototypes]
int smu7_init_function_pointers(struct pp_hwmgr *hwmgr)
^
drivers/gpu/drm/amd/amdgpu/../pm/powerplay/hwmgr/smu7_hwmgr.c:5207:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
int smu7_init_function_pointers(struct pp_hwmgr *hwmgr)
^
static
3 warnings generated.
--
In file included from drivers/gpu/drm/amd/amdgpu/../pm/powerplay/hwmgr/vega10_processpptables.c:23:
In file included from include/linux/module.h:12:
In file included from include/linux/list.h:9:
In file included from include/linux/kernel.h:12:
In file included from include/linux/bitops.h:29:
In file included from arch/powerpc/include/asm/bitops.h:62:
arch/powerpc/include/asm/barrier.h:49:9: warning: '__lwsync' macro redefined [-Wmacro-redefined]
#define __lwsync() __asm__ __volatile__ (stringify_in_c(LWSYNC) : : :"memory")
^
<built-in>:310:9: note: previous definition is here
#define __lwsync __builtin_ppc_lwsync
^
>> drivers/gpu/drm/amd/amdgpu/../pm/powerplay/hwmgr/vega10_processpptables.c:49:14: warning: performing pointer subtraction with a null pointer has undefined behavior [-Wnull-pointer-subtraction]
int index = GetIndexIntoMasterDataTable(powerplayinfo);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../pm/powerplay/hwmgr/ppatomfwctrl.h:34:74: note: expanded from macro 'GetIndexIntoMasterDataTable'
(((char*)(&((struct atom_master_list_of_data_tables_v2_1*)0)->FieldName)-(char*)0)/sizeof(uint16_t))
^~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../pm/powerplay/hwmgr/vega10_processpptables.c:1182:5: warning: no previous prototype for function 'vega10_pp_tables_initialize' [-Wmissing-prototypes]
int vega10_pp_tables_initialize(struct pp_hwmgr *hwmgr)
^
drivers/gpu/drm/amd/amdgpu/../pm/powerplay/hwmgr/vega10_processpptables.c:1182:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
int vega10_pp_tables_initialize(struct pp_hwmgr *hwmgr)
^
static
3 warnings generated.
..

vim +841 drivers/gpu/drm/amd/amdgpu/../pm/powerplay/hwmgr/processpptables.c

3bace359149391 drivers/gpu/drm/amd/powerplay/hwmgr/processpptables.c Jammy Zhou 2015-07-21 826
3bace359149391 drivers/gpu/drm/amd/powerplay/hwmgr/processpptables.c Jammy Zhou 2015-07-21 827 static const ATOM_PPLIB_POWERPLAYTABLE *get_powerplay_table(
3bace359149391 drivers/gpu/drm/amd/powerplay/hwmgr/processpptables.c Jammy Zhou 2015-07-21 828 struct pp_hwmgr *hwmgr)
3bace359149391 drivers/gpu/drm/amd/powerplay/hwmgr/processpptables.c Jammy Zhou 2015-07-21 829 {
cf17039f489d3d drivers/gpu/drm/amd/powerplay/hwmgr/processpptables.c Eric Huang 2016-05-31 830 const void *table_addr = hwmgr->soft_pp_table;
3bace359149391 drivers/gpu/drm/amd/powerplay/hwmgr/processpptables.c Jammy Zhou 2015-07-21 831 uint8_t frev, crev;
3bace359149391 drivers/gpu/drm/amd/powerplay/hwmgr/processpptables.c Jammy Zhou 2015-07-21 832 uint16_t size;
3bace359149391 drivers/gpu/drm/amd/powerplay/hwmgr/processpptables.c Jammy Zhou 2015-07-21 833
cf17039f489d3d drivers/gpu/drm/amd/powerplay/hwmgr/processpptables.c Eric Huang 2016-05-31 834 if (!table_addr) {
741deade2a704a drivers/gpu/drm/amd/powerplay/hwmgr/processpptables.c Alex Deucher 2018-09-13 835 if (hwmgr->chip_id == CHIP_RAVEN) {
3b4ca9e6494d19 drivers/gpu/drm/amd/powerplay/hwmgr/processpptables.c Rex Zhu 2017-08-24 836 table_addr = &soft_dummy_pp_table[0];
3b4ca9e6494d19 drivers/gpu/drm/amd/powerplay/hwmgr/processpptables.c Rex Zhu 2017-08-24 837 hwmgr->soft_pp_table = &soft_dummy_pp_table[0];
3b4ca9e6494d19 drivers/gpu/drm/amd/powerplay/hwmgr/processpptables.c Rex Zhu 2017-08-24 838 hwmgr->soft_pp_table_size = sizeof(soft_dummy_pp_table);
3b4ca9e6494d19 drivers/gpu/drm/amd/powerplay/hwmgr/processpptables.c Rex Zhu 2017-08-24 839 } else {
b3892e2bb519fe drivers/gpu/drm/amd/powerplay/hwmgr/processpptables.c Rex Zhu 2018-03-26 840 table_addr = smu_atom_get_data_table(hwmgr->adev,
3bace359149391 drivers/gpu/drm/amd/powerplay/hwmgr/processpptables.c Jammy Zhou 2015-07-21 @841 GetIndexIntoMasterTable(DATA, PowerPlayInfo),
3bace359149391 drivers/gpu/drm/amd/powerplay/hwmgr/processpptables.c Jammy Zhou 2015-07-21 842 &size, &frev, &crev);
3bace359149391 drivers/gpu/drm/amd/powerplay/hwmgr/processpptables.c Jammy Zhou 2015-07-21 843 hwmgr->soft_pp_table = table_addr;
cf17039f489d3d drivers/gpu/drm/amd/powerplay/hwmgr/processpptables.c Eric Huang 2016-05-31 844 hwmgr->soft_pp_table_size = size;
cf17039f489d3d drivers/gpu/drm/amd/powerplay/hwmgr/processpptables.c Eric Huang 2016-05-31 845 }
3b4ca9e6494d19 drivers/gpu/drm/amd/powerplay/hwmgr/processpptables.c Rex Zhu 2017-08-24 846 }
3bace359149391 drivers/gpu/drm/amd/powerplay/hwmgr/processpptables.c Jammy Zhou 2015-07-21 847
3bace359149391 drivers/gpu/drm/amd/powerplay/hwmgr/processpptables.c Jammy Zhou 2015-07-21 848 return (const ATOM_PPLIB_POWERPLAYTABLE *)table_addr;
3bace359149391 drivers/gpu/drm/amd/powerplay/hwmgr/processpptables.c Jammy Zhou 2015-07-21 849 }
3bace359149391 drivers/gpu/drm/amd/powerplay/hwmgr/processpptables.c Jammy Zhou 2015-07-21 850

:::::: The code at line 841 was first introduced by commit
:::::: 3bace359149391c6547cefe3bf729f365bcf3ef6 drm/amd/powerplay: add hardware manager sub-component

:::::: TO: Jammy Zhou <Jammy.Zhou@xxxxxxx>
:::::: CC: Alex Deucher <alexander.deucher@xxxxxxx>

---
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