drivers/gpu/drm/amd/amdgpu/../display/dc/dml/dsc/rc_calc_fpu.c:81:40: sparse: sparse: Using plain integer as NULL pointer

From: kernel test robot
Date: Mon Jan 24 2022 - 22:04:05 EST

tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: dd81e1c7d5fb126e5fbc5c9e334d7b3ec29a16a0
commit: d738db6883df3e3c513f9e777c842262693f951b drm/amd/display: move FPU associated DSC code to DML folder
date: 3 months ago
config: i386-randconfig-s002-20211122 (https://download.01.org/0day-ci/archive/20220125/202201250805.QTVOfpYt-lkp@xxxxxxxxx/config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce:
# apt-get install sparse
# sparse version: v0.6.4-dirty
# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=d738db6883df3e3c513f9e777c842262693f951b
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout d738db6883df3e3c513f9e777c842262693f951b
# save the config file to linux build tree
mkdir build_dir
make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=i386 SHELL=/bin/bash

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


sparse warnings: (new ones prefixed by >>)
drivers/gpu/drm/amd/amdgpu/../display/dc/dml/dsc/rc_calc_fpu.c: note: in included file:
drivers/gpu/drm/amd/amdgpu/../display/dc/dml/dsc/qp_tables.h:28:18: sparse: sparse: symbol 'qp_table_422_10bpc_min' was not declared. Should it be static?
drivers/gpu/drm/amd/amdgpu/../display/dc/dml/dsc/qp_tables.h:61:18: sparse: sparse: symbol 'qp_table_444_8bpc_max' was not declared. Should it be static?
drivers/gpu/drm/amd/amdgpu/../display/dc/dml/dsc/qp_tables.h:102:18: sparse: sparse: symbol 'qp_table_420_12bpc_max' was not declared. Should it be static?
drivers/gpu/drm/amd/amdgpu/../display/dc/dml/dsc/qp_tables.h:135:18: sparse: sparse: symbol 'qp_table_444_10bpc_min' was not declared. Should it be static?
drivers/gpu/drm/amd/amdgpu/../display/dc/dml/dsc/qp_tables.h:188:18: sparse: sparse: symbol 'qp_table_420_8bpc_max' was not declared. Should it be static?
drivers/gpu/drm/amd/amdgpu/../display/dc/dml/dsc/qp_tables.h:209:18: sparse: sparse: symbol 'qp_table_444_8bpc_min' was not declared. Should it be static?
drivers/gpu/drm/amd/amdgpu/../display/dc/dml/dsc/qp_tables.h:250:18: sparse: sparse: symbol 'qp_table_444_12bpc_min' was not declared. Should it be static?
drivers/gpu/drm/amd/amdgpu/../display/dc/dml/dsc/qp_tables.h:315:18: sparse: sparse: symbol 'qp_table_420_12bpc_min' was not declared. Should it be static?
drivers/gpu/drm/amd/amdgpu/../display/dc/dml/dsc/qp_tables.h:348:18: sparse: sparse: symbol 'qp_table_422_12bpc_min' was not declared. Should it be static?
drivers/gpu/drm/amd/amdgpu/../display/dc/dml/dsc/qp_tables.h:389:18: sparse: sparse: symbol 'qp_table_422_12bpc_max' was not declared. Should it be static?
drivers/gpu/drm/amd/amdgpu/../display/dc/dml/dsc/qp_tables.h:430:18: sparse: sparse: symbol 'qp_table_444_12bpc_max' was not declared. Should it be static?
drivers/gpu/drm/amd/amdgpu/../display/dc/dml/dsc/qp_tables.h:495:18: sparse: sparse: symbol 'qp_table_420_8bpc_min' was not declared. Should it be static?
drivers/gpu/drm/amd/amdgpu/../display/dc/dml/dsc/qp_tables.h:516:18: sparse: sparse: symbol 'qp_table_422_8bpc_min' was not declared. Should it be static?
drivers/gpu/drm/amd/amdgpu/../display/dc/dml/dsc/qp_tables.h:541:18: sparse: sparse: symbol 'qp_table_422_10bpc_max' was not declared. Should it be static?
drivers/gpu/drm/amd/amdgpu/../display/dc/dml/dsc/qp_tables.h:574:16: sparse: sparse: symbol 'qp_table_420_10bpc_max' was not declared. Should it be static?
drivers/gpu/drm/amd/amdgpu/../display/dc/dml/dsc/qp_tables.h:601:18: sparse: sparse: symbol 'qp_table_420_10bpc_min' was not declared. Should it be static?
drivers/gpu/drm/amd/amdgpu/../display/dc/dml/dsc/qp_tables.h:628:18: sparse: sparse: symbol 'qp_table_444_10bpc_max' was not declared. Should it be static?
drivers/gpu/drm/amd/amdgpu/../display/dc/dml/dsc/qp_tables.h:681:18: sparse: sparse: symbol 'qp_table_422_8bpc_max' was not declared. Should it be static?
>> drivers/gpu/drm/amd/amdgpu/../display/dc/dml/dsc/rc_calc_fpu.c:81:40: sparse: sparse: Using plain integer as NULL pointer
drivers/gpu/drm/amd/amdgpu/../display/dc/dml/dsc/rc_calc_fpu.c:106:22: sparse: sparse: Using plain integer as NULL pointer

vim +81 drivers/gpu/drm/amd/amdgpu/../display/dc/dml/dsc/rc_calc_fpu.c

73
74 static void get_qp_set(qp_set qps, enum colour_mode cm, enum bits_per_comp bpc,
75 enum max_min max_min, float bpp)
76 {
77 int mode = MODE_SELECT(444, 422, 420);
78 int sel = table_hash(mode, bpc, max_min);
79 int table_size = 0;
80 int index;
> 81 const struct qp_entry *table = 0L;
82
83 // alias enum
84 enum { min = DAL_MM_MIN, max = DAL_MM_MAX };
85 switch (sel) {
86 TABLE_CASE(444, 8, max);
87 TABLE_CASE(444, 8, min);
88 TABLE_CASE(444, 10, max);
89 TABLE_CASE(444, 10, min);
90 TABLE_CASE(444, 12, max);
91 TABLE_CASE(444, 12, min);
92 TABLE_CASE(422, 8, max);
93 TABLE_CASE(422, 8, min);
94 TABLE_CASE(422, 10, max);
95 TABLE_CASE(422, 10, min);
96 TABLE_CASE(422, 12, max);
97 TABLE_CASE(422, 12, min);
98 TABLE_CASE(420, 8, max);
99 TABLE_CASE(420, 8, min);
100 TABLE_CASE(420, 10, max);
101 TABLE_CASE(420, 10, min);
102 TABLE_CASE(420, 12, max);
103 TABLE_CASE(420, 12, min);
104 }
105
106 if (table == 0)
107 return;
108
109 index = (bpp - table[0].bpp) * 2;
110
111 /* requested size is bigger than the table */
112 if (index >= table_size) {
113 dm_error("ERROR: Requested rc_calc to find a bpp entry that exceeds the table size\n");
114 return;
115 }
116
117 memcpy(qps, table[index].qps, sizeof(qp_set));
118 }
119

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx