include/linux/bitfield.h:221:17: error: call to '__bad_mask' declared with attribute error: bad bitfield mask
kernel test robot <[email protected]> Wed, 29 Jul 2026 13:18:52 +0800
| Newsgroups | dev.linux.lists.oe-kbuild |
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:::::: :::::: Manual check reason: "bisect to a FBC not belonging to original linux-review patches: branch: linux-review/muhammad-nazim-amirul-nazle-asmade-altera-com/net-stmmac-fpe-Enforce-pmac_enabled-in-set_mm-and-keep-it-on-at-init/20260729-100008, commit: 8a04b4757aed73457fdc91c3f61946a624832ba6" :::::: BCC: [email protected] CC: [email protected] TO: Nazim Amirul <[email protected]> CC: 0day robot <[email protected]> CC: Rohan G Thomas <[email protected]> tree: https://github.com/intel-lab-lkp/linux/commits/muhammad-nazim-amirul-nazle-asmade-altera-com/net-stmmac-fpe-Enforce-pmac_enabled-in-set_mm-and-keep-it-on-at-init/20260729-100008 head: 8a04b4757aed73457fdc91c3f61946a624832ba6 commit: 8a04b4757aed73457fdc91c3f61946a624832ba6 net: stmmac: fpe: Move fprq configuration to stmmac_fpe_configure_pmac() date: 3 hours ago :::::: branch date: 3 hours ago :::::: commit date: 3 hours ago config: alpha-allmodconfig (https://download.01.org/0day-ci/archive/20260729/[email protected]/config) compiler: alpha-linux-gcc (GCC) 16.1.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260729/[email protected]/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <[email protected]> | Closes: https://lore.kernel.org/r/[email protected]/ All errors (new ones prefixed by >>): In file included from include/linux/mdio.h:10, from include/linux/phy.h:20, from include/linux/phylink.h:4, from include/linux/stmmac.h:16, from drivers/net/ethernet/stmicro/stmmac/stmmac.h:17, from drivers/net/ethernet/stmicro/stmmac/stmmac_fpe.c:6: In function 'field_multiplier', inlined from 'field_mask' at include/linux/bitfield.h:226:17, inlined from 'u32_encode_bits' at include/linux/bitfield.h:256:1, inlined from 'u32_replace_bits' at include/linux/bitfield.h:256:1, inlined from 'stmmac_fpe_configure_pmac' at drivers/net/ethernet/stmicro/stmmac/stmmac_fpe.c:83:10: >> include/linux/bitfield.h:221:17: error: call to '__bad_mask' declared with attribute error: bad bitfield mask 221 | __bad_mask(); | ^~~~~~~~~~~~ In function 'field_multiplier', inlined from 'u32_encode_bits' at include/linux/bitfield.h:256:1, inlined from 'u32_replace_bits' at include/linux/bitfield.h:256:1, inlined from 'stmmac_fpe_configure_pmac' at drivers/net/ethernet/stmicro/stmmac/stmmac_fpe.c:83:10: >> include/linux/bitfield.h:221:17: error: call to '__bad_mask' declared with attribute error: bad bitfield mask 221 | __bad_mask(); | ^~~~~~~~~~~~ vim +/__bad_mask +221 include/linux/bitfield.h e2192de59e457a Johannes Berg 2023-01-18 142 e2192de59e457a Johannes Berg 2023-01-18 143 /** e2192de59e457a Johannes Berg 2023-01-18 144 * FIELD_PREP_CONST() - prepare a constant bitfield element e2192de59e457a Johannes Berg 2023-01-18 145 * @_mask: shifted mask defining the field's length and position e2192de59e457a Johannes Berg 2023-01-18 146 * @_val: value to put in the field e2192de59e457a Johannes Berg 2023-01-18 147 * e2192de59e457a Johannes Berg 2023-01-18 148 * FIELD_PREP_CONST() masks and shifts up the value. The result should e2192de59e457a Johannes Berg 2023-01-18 149 * be combined with other fields of the bitfield using logical OR. e2192de59e457a Johannes Berg 2023-01-18 150 * e2192de59e457a Johannes Berg 2023-01-18 151 * Unlike FIELD_PREP() this is a constant expression and can therefore e2192de59e457a Johannes Berg 2023-01-18 152 * be used in initializers. Error checking is less comfortable for this e2192de59e457a Johannes Berg 2023-01-18 153 * version, and non-constant masks cannot be used. e2192de59e457a Johannes Berg 2023-01-18 154 */ e2192de59e457a Johannes Berg 2023-01-18 155 #define FIELD_PREP_CONST(_mask, _val) \ e2192de59e457a Johannes Berg 2023-01-18 156 ( \ e2192de59e457a Johannes Berg 2023-01-18 157 /* mask must be non-zero */ \ e2192de59e457a Johannes Berg 2023-01-18 158 BUILD_BUG_ON_ZERO((_mask) == 0) + \ e2192de59e457a Johannes Berg 2023-01-18 159 /* check if value fits */ \ e2192de59e457a Johannes Berg 2023-01-18 160 BUILD_BUG_ON_ZERO(~((_mask) >> __bf_shf(_mask)) & (_val)) + \ e2192de59e457a Johannes Berg 2023-01-18 161 /* check if mask is contiguous */ \ e2192de59e457a Johannes Berg 2023-01-18 162 __BF_CHECK_POW2((_mask) + (1ULL << __bf_shf(_mask))) + \ e2192de59e457a Johannes Berg 2023-01-18 163 /* and create the value */ \ e2192de59e457a Johannes Berg 2023-01-18 164 (((typeof(_mask))(_val) << __bf_shf(_mask)) & (_mask)) \ e2192de59e457a Johannes Berg 2023-01-18 165 ) e2192de59e457a Johannes Berg 2023-01-18 166 3e9b3112ec74f1 Jakub Kicinski 2016-08-31 167 /** 3e9b3112ec74f1 Jakub Kicinski 2016-08-31 168 * FIELD_GET() - extract a bitfield element 3e9b3112ec74f1 Jakub Kicinski 2016-08-31 169 * @_mask: shifted mask defining the field's length and position 7240767450d6d8 Masahiro Yamada 2017-10-03 170 * @_reg: value of entire bitfield 3e9b3112ec74f1 Jakub Kicinski 2016-08-31 171 * 3e9b3112ec74f1 Jakub Kicinski 2016-08-31 172 * FIELD_GET() extracts the field specified by @_mask from the 3e9b3112ec74f1 Jakub Kicinski 2016-08-31 173 * bitfield passed in as @_reg by masking and shifting it down. 3e9b3112ec74f1 Jakub Kicinski 2016-08-31 174 */ 3e9b3112ec74f1 Jakub Kicinski 2016-08-31 175 #define FIELD_GET(_mask, _reg) \ 3e9b3112ec74f1 Jakub Kicinski 2016-08-31 176 ({ \ 2a6c045640c38a Geert Uytterhoeven 2025-11-06 177 __BF_FIELD_CHECK_REG(_mask, _reg, "FIELD_GET: "); \ 2a6c045640c38a Geert Uytterhoeven 2025-11-06 178 __FIELD_GET(_mask, _reg, "FIELD_GET: "); \ 3e9b3112ec74f1 Jakub Kicinski 2016-08-31 179 }) 3e9b3112ec74f1 Jakub Kicinski 2016-08-31 180 2c3f0541b99c60 Yury Norov 2026-04-27 181 /** 2c3f0541b99c60 Yury Norov 2026-04-27 182 * FIELD_GET_SIGNED() - extract a signed bitfield element 2c3f0541b99c60 Yury Norov 2026-04-27 183 * @mask: shifted mask defining the field's length and position 2c3f0541b99c60 Yury Norov 2026-04-27 184 * @reg: value of entire bitfield 2c3f0541b99c60 Yury Norov 2026-04-27 185 * 2c3f0541b99c60 Yury Norov 2026-04-27 186 * Returns the sign-extended field specified by @_mask from the 2c3f0541b99c60 Yury Norov 2026-04-27 187 * bitfield passed in as @reg by masking and shifting it down. 2c3f0541b99c60 Yury Norov 2026-04-27 188 */ 2c3f0541b99c60 Yury Norov 2026-04-27 189 #define FIELD_GET_SIGNED(mask, reg) \ 2c3f0541b99c60 Yury Norov 2026-04-27 190 ({ \ 2c3f0541b99c60 Yury Norov 2026-04-27 191 __BF_FIELD_CHECK(mask, reg, 0U, "FIELD_GET_SIGNED: "); \ 2c3f0541b99c60 Yury Norov 2026-04-27 192 ((__signed_scalar_typeof(mask)) \ 2c3f0541b99c60 Yury Norov 2026-04-27 193 (((long long)(reg) << __builtin_clzll(mask)) >> \ 2c3f0541b99c60 Yury Norov 2026-04-27 194 (__builtin_clzll(mask) + __builtin_ctzll(mask)))); \ 2c3f0541b99c60 Yury Norov 2026-04-27 195 }) 2c3f0541b99c60 Yury Norov 2026-04-27 196 a256ae22570ee4 Luo Jie 2025-04-17 197 /** a256ae22570ee4 Luo Jie 2025-04-17 198 * FIELD_MODIFY() - modify a bitfield element a256ae22570ee4 Luo Jie 2025-04-17 199 * @_mask: shifted mask defining the field's length and position a256ae22570ee4 Luo Jie 2025-04-17 200 * @_reg_p: pointer to the memory that should be updated a256ae22570ee4 Luo Jie 2025-04-17 201 * @_val: value to store in the bitfield a256ae22570ee4 Luo Jie 2025-04-17 202 * a256ae22570ee4 Luo Jie 2025-04-17 203 * FIELD_MODIFY() modifies the set of bits in @_reg_p specified by @_mask, a256ae22570ee4 Luo Jie 2025-04-17 204 * by replacing them with the bitfield value passed in as @_val. a256ae22570ee4 Luo Jie 2025-04-17 205 */ a256ae22570ee4 Luo Jie 2025-04-17 206 #define FIELD_MODIFY(_mask, _reg_p, _val) \ a256ae22570ee4 Luo Jie 2025-04-17 207 ({ \ a256ae22570ee4 Luo Jie 2025-04-17 208 typecheck_pointer(_reg_p); \ a256ae22570ee4 Luo Jie 2025-04-17 209 __BF_FIELD_CHECK(_mask, *(_reg_p), _val, "FIELD_MODIFY: "); \ a256ae22570ee4 Luo Jie 2025-04-17 210 *(_reg_p) &= ~(_mask); \ a256ae22570ee4 Luo Jie 2025-04-17 211 *(_reg_p) |= (((typeof(_mask))(_val) << __bf_shf(_mask)) & (_mask)); \ a256ae22570ee4 Luo Jie 2025-04-17 212 }) a256ae22570ee4 Luo Jie 2025-04-17 213 e7d4a95da86e0b Johannes Berg 2018-06-20 214 extern void __compiletime_error("value doesn't fit into mask") 00b0c9b82663ac Al Viro 2017-12-14 215 __field_overflow(void); 00b0c9b82663ac Al Viro 2017-12-14 216 extern void __compiletime_error("bad bitfield mask") 00b0c9b82663ac Al Viro 2017-12-14 217 __bad_mask(void); 00b0c9b82663ac Al Viro 2017-12-14 218 static __always_inline u64 field_multiplier(u64 field) 00b0c9b82663ac Al Viro 2017-12-14 219 { 00b0c9b82663ac Al Viro 2017-12-14 220 if ((field | (field - 1)) & ((field | (field - 1)) + 1)) 00b0c9b82663ac Al Viro 2017-12-14 @221 __bad_mask(); 00b0c9b82663ac Al Viro 2017-12-14 222 return field & -field; 00b0c9b82663ac Al Viro 2017-12-14 223 } 00b0c9b82663ac Al Viro 2017-12-14 224 static __always_inline u64 field_mask(u64 field) 00b0c9b82663ac Al Viro 2017-12-14 225 { 00b0c9b82663ac Al Viro 2017-12-14 226 return field / field_multiplier(field); 00b0c9b82663ac Al Viro 2017-12-14 227 } e31a50162feb35 Alex Elder 2020-03-12 228 #define field_max(field) ((typeof(field))field_mask(field)) 00b0c9b82663ac Al Viro 2017-12-14 229 #define ____MAKE_OP(type,base,to,from) \ e2b02d382ae0cb Ben Horgan 2025-07-09 230 static __always_inline __##type __must_check type##_encode_bits(base v, base field) \ 00b0c9b82663ac Al Viro 2017-12-14 231 { \ e7d4a95da86e0b Johannes Berg 2018-06-20 232 if (__builtin_constant_p(v) && (v & ~field_mask(field))) \ 00b0c9b82663ac Al Viro 2017-12-14 233 __field_overflow(); \ 00b0c9b82663ac Al Viro 2017-12-14 234 return to((v & field_mask(field)) * field_multiplier(field)); \ 00b0c9b82663ac Al Viro 2017-12-14 235 } \ e2b02d382ae0cb Ben Horgan 2025-07-09 236 static __always_inline __##type __must_check type##_replace_bits(__##type old, \ 00b0c9b82663ac Al Viro 2017-12-14 237 base val, base field) \ 00b0c9b82663ac Al Viro 2017-12-14 238 { \ 00b0c9b82663ac Al Viro 2017-12-14 239 return (old & ~to(field)) | type##_encode_bits(val, field); \ 00b0c9b82663ac Al Viro 2017-12-14 240 } \ 00b0c9b82663ac Al Viro 2017-12-14 241 static __always_inline void type##p_replace_bits(__##type *p, \ 00b0c9b82663ac Al Viro 2017-12-14 242 base val, base field) \ 00b0c9b82663ac Al Viro 2017-12-14 243 { \ 00b0c9b82663ac Al Viro 2017-12-14 244 *p = (*p & ~to(field)) | type##_encode_bits(val, field); \ 00b0c9b82663ac Al Viro 2017-12-14 245 } \ e2b02d382ae0cb Ben Horgan 2025-07-09 246 static __always_inline base __must_check type##_get_bits(__##type v, base field) \ 00b0c9b82663ac Al Viro 2017-12-14 247 { \ 00b0c9b82663ac Al Viro 2017-12-14 248 return (from(v) & field)/field_multiplier(field); \ 00b0c9b82663ac Al Viro 2017-12-14 249 } 00b0c9b82663ac Al Viro 2017-12-14 250 #define __MAKE_OP(size) \ 00b0c9b82663ac Al Viro 2017-12-14 251 ____MAKE_OP(le##size,u##size,cpu_to_le##size,le##size##_to_cpu) \ 00b0c9b82663ac Al Viro 2017-12-14 252 ____MAKE_OP(be##size,u##size,cpu_to_be##size,be##size##_to_cpu) \ 00b0c9b82663ac Al Viro 2017-12-14 253 ____MAKE_OP(u##size,u##size,,) 37a3862e123826 Johannes Berg 2018-06-20 254 ____MAKE_OP(u8,u8,,) 00b0c9b82663ac Al Viro 2017-12-14 255 __MAKE_OP(16) 00b0c9b82663ac Al Viro 2017-12-14 256 __MAKE_OP(32) 00b0c9b82663ac Al Viro 2017-12-14 257 __MAKE_OP(64) 00b0c9b82663ac Al Viro 2017-12-14 258 #undef __MAKE_OP 00b0c9b82663ac Al Viro 2017-12-14 259 #undef ____MAKE_OP 00b0c9b82663ac Al Viro 2017-12-14 260 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki