tree: https://github.com/norov/linux remove-find-h head: a3a1691cca887a386a029d858a3d69cbb3e3843f commit: c17320c8f35578470da69fe0a4e5eb9e7a2c7fb6 [13/15] remove GENERIC_FIND_FIRST_BIT config: m68k-allmodconfig (attached as .config) compiler: m68k-linux-gcc (GCC) 9.3.0 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 # https://github.com/norov/linux/commit/c17320c8f35578470da69fe0a4e5eb9e7a2... git remote add norov https://github.com/norov/linux git fetch --no-tags norov remove-find-h git checkout c17320c8f35578470da69fe0a4e5eb9e7a2c7fb6 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=m68k If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): In file included from include/linux/bitops.h:32, from include/linux/kernel.h:11, from include/asm-generic/bug.h:20, from arch/m68k/include/asm/bug.h:32, from include/linux/bug.h:5, from include/linux/page-flags.h:10, from kernel/bounds.c:10: 396 | #define find_first_bit find_first_bit | ^~~~~~~~~~~~~~ include/asm-generic/bitops/find.h:107:15: note: in expansion of macro 'find_first_bit' 107 | unsigned long find_first_bit(const unsigned long *addr, unsigned long size) | ^~~~~~~~~~~~~~ arch/m68k/include/asm/bitops.h:373:19: note: previous definition of 'find_first_bit' was here 373 | static inline int find_first_bit(const unsigned long *vaddr, unsigned size) | ^~~~~~~~~~~~~~ 341 | #define find_first_zero_bit find_first_zero_bit | ^~~~~~~~~~~~~~~~~~~ include/asm-generic/bitops/find.h:127:15: note: in expansion of macro 'find_first_zero_bit' 127 | unsigned long find_first_zero_bit(const unsigned long *addr, unsigned long size) | ^~~~~~~~~~~~~~~~~~~ arch/m68k/include/asm/bitops.h:317:19: note: previous definition of 'find_first_zero_bit' was here 317 | static inline int find_first_zero_bit(const unsigned long *vaddr, | ^~~~~~~~~~~~~~~~~~~ -- In file included from include/linux/bitops.h:32, from include/linux/kernel.h:11, from include/linux/list.h:9, from include/linux/module.h:12, from arch/m68k/emu/nfblock.c:9: 396 | #define find_first_bit find_first_bit | ^~~~~~~~~~~~~~ include/asm-generic/bitops/find.h:107:15: note: in expansion of macro 'find_first_bit' 107 | unsigned long find_first_bit(const unsigned long *addr, unsigned long size) | ^~~~~~~~~~~~~~ arch/m68k/include/asm/bitops.h:373:19: note: previous definition of 'find_first_bit' was here 373 | static inline int find_first_bit(const unsigned long *vaddr, unsigned size) | ^~~~~~~~~~~~~~ 341 | #define find_first_zero_bit find_first_zero_bit | ^~~~~~~~~~~~~~~~~~~ include/asm-generic/bitops/find.h:127:15: note: in expansion of macro 'find_first_zero_bit' 127 | unsigned long find_first_zero_bit(const unsigned long *addr, unsigned long size) | ^~~~~~~~~~~~~~~~~~~ arch/m68k/include/asm/bitops.h:317:19: note: previous definition of 'find_first_zero_bit' was here 317 | static inline int find_first_zero_bit(const unsigned long *vaddr, | ^~~~~~~~~~~~~~~~~~~ In file included from include/linux/mmzone.h:19, from include/linux/gfp.h:6, from include/linux/umh.h:4, from include/linux/kmod.h:9, from include/linux/module.h:16, from arch/m68k/emu/nfblock.c:9: include/linux/page-flags-layout.h:6:10: fatal error: generated/bounds.h: No such file or directory 6 | #include <generated/bounds.h> | ^~~~~~~~~~~~~~~~~~~~ compilation terminated. -- In file included from include/linux/bitops.h:32, from include/linux/kernel.h:11, from include/asm-generic/bug.h:20, from arch/m68k/include/asm/bug.h:32, from include/linux/bug.h:5, from include/linux/page-flags.h:10, from kernel/bounds.c:10: 396 | #define find_first_bit find_first_bit | ^~~~~~~~~~~~~~ include/asm-generic/bitops/find.h:107:15: note: in expansion of macro 'find_first_bit' 107 | unsigned long find_first_bit(const unsigned long *addr, unsigned long size) | ^~~~~~~~~~~~~~ arch/m68k/include/asm/bitops.h:373:19: note: previous definition of 'find_first_bit' was here 373 | static inline int find_first_bit(const unsigned long *vaddr, unsigned size) | ^~~~~~~~~~~~~~ 341 | #define find_first_zero_bit find_first_zero_bit | ^~~~~~~~~~~~~~~~~~~ include/asm-generic/bitops/find.h:127:15: note: in expansion of macro 'find_first_zero_bit' 127 | unsigned long find_first_zero_bit(const unsigned long *addr, unsigned long size) | ^~~~~~~~~~~~~~~~~~~ arch/m68k/include/asm/bitops.h:317:19: note: previous definition of 'find_first_zero_bit' was here 317 | static inline int find_first_zero_bit(const unsigned long *vaddr, | ^~~~~~~~~~~~~~~~~~~ make[2]: *** [scripts/Makefile.build:118: kernel/bounds.s] Error 1 make[2]: Target '__build' not remade because of errors. make[1]: *** [Makefile:1329: prepare0] Error 2 make[1]: Target 'modules_prepare' not remade because of errors. make: *** [Makefile:222: __sub-make] Error 2 make: Target 'modules_prepare' not remade because of errors. -- error: no override and no default toolchain set init/Kconfig:67:warning: 'RUSTC_VERSION': number is invalid In file included from include/linux/bitops.h:32, from include/linux/kernel.h:11, from include/asm-generic/bug.h:20, from arch/m68k/include/asm/bug.h:32, from include/linux/bug.h:5, from include/linux/page-flags.h:10, from kernel/bounds.c:10: 396 | #define find_first_bit find_first_bit | ^~~~~~~~~~~~~~ include/asm-generic/bitops/find.h:107:15: note: in expansion of macro 'find_first_bit' 107 | unsigned long find_first_bit(const unsigned long *addr, unsigned long size) | ^~~~~~~~~~~~~~ arch/m68k/include/asm/bitops.h:373:19: note: previous definition of 'find_first_bit' was here 373 | static inline int find_first_bit(const unsigned long *vaddr, unsigned size) | ^~~~~~~~~~~~~~ 341 | #define find_first_zero_bit find_first_zero_bit | ^~~~~~~~~~~~~~~~~~~ include/asm-generic/bitops/find.h:127:15: note: in expansion of macro 'find_first_zero_bit' 127 | unsigned long find_first_zero_bit(const unsigned long *addr, unsigned long size) | ^~~~~~~~~~~~~~~~~~~ arch/m68k/include/asm/bitops.h:317:19: note: previous definition of 'find_first_zero_bit' was here 317 | static inline int find_first_zero_bit(const unsigned long *vaddr, | ^~~~~~~~~~~~~~~~~~~ make[2]: *** [scripts/Makefile.build:118: kernel/bounds.s] Error 1 make[2]: Target '__build' not remade because of errors. make[1]: *** [Makefile:1329: prepare0] Error 2 make[1]: Target 'prepare' not remade because of errors. make: *** [Makefile:222: __sub-make] Error 2 make: Target 'prepare' not remade because of errors. vim +/find_first_bit +396 arch/m68k/include/asm/bitops.h 171d809df1896c Greg Ungerer 2011-05-17 316 171d809df1896c Greg Ungerer 2011-05-17 317 static inline int find_first_zero_bit(const unsigned long *vaddr, 171d809df1896c Greg Ungerer 2011-05-17 318 unsigned size) 171d809df1896c Greg Ungerer 2011-05-17 319 { 171d809df1896c Greg Ungerer 2011-05-17 320 const unsigned long *p = vaddr; 171d809df1896c Greg Ungerer 2011-05-17 321 int res = 32; 171d809df1896c Greg Ungerer 2011-05-17 322 unsigned int words; 171d809df1896c Greg Ungerer 2011-05-17 323 unsigned long num; 171d809df1896c Greg Ungerer 2011-05-17 324 171d809df1896c Greg Ungerer 2011-05-17 325 if (!size) 171d809df1896c Greg Ungerer 2011-05-17 326 return 0; 171d809df1896c Greg Ungerer 2011-05-17 327 171d809df1896c Greg Ungerer 2011-05-17 328 words = (size + 31) >> 5; 171d809df1896c Greg Ungerer 2011-05-17 329 while (!(num = ~*p++)) { 171d809df1896c Greg Ungerer 2011-05-17 330 if (!--words) 171d809df1896c Greg Ungerer 2011-05-17 331 goto out; 171d809df1896c Greg Ungerer 2011-05-17 332 } 171d809df1896c Greg Ungerer 2011-05-17 333 171d809df1896c Greg Ungerer 2011-05-17 334 __asm__ __volatile__ ("bfffo %1{#0,#0},%0" 171d809df1896c Greg Ungerer 2011-05-17 335 : "=d" (res) : "d" (num & -num)); 171d809df1896c Greg Ungerer 2011-05-17 336 res ^= 31; 171d809df1896c Greg Ungerer 2011-05-17 337 out: 171d809df1896c Greg Ungerer 2011-05-17 338 res += ((long)p - (long)vaddr - 4) * 8; 171d809df1896c Greg Ungerer 2011-05-17 339 return res < size ? res : size; 171d809df1896c Greg Ungerer 2011-05-17 340 } 171d809df1896c Greg Ungerer 2011-05-17 @341 #define find_first_zero_bit find_first_zero_bit 171d809df1896c Greg Ungerer 2011-05-17 342 171d809df1896c Greg Ungerer 2011-05-17 343 static inline int find_next_zero_bit(const unsigned long *vaddr, int size, 171d809df1896c Greg Ungerer 2011-05-17 344 int offset) 171d809df1896c Greg Ungerer 2011-05-17 345 { 171d809df1896c Greg Ungerer 2011-05-17 346 const unsigned long *p = vaddr + (offset >> 5); 171d809df1896c Greg Ungerer 2011-05-17 347 int bit = offset & 31UL, res; 171d809df1896c Greg Ungerer 2011-05-17 348 171d809df1896c Greg Ungerer 2011-05-17 349 if (offset >= size) 171d809df1896c Greg Ungerer 2011-05-17 350 return size; 171d809df1896c Greg Ungerer 2011-05-17 351 171d809df1896c Greg Ungerer 2011-05-17 352 if (bit) { 171d809df1896c Greg Ungerer 2011-05-17 353 unsigned long num = ~*p++ & (~0UL << bit); 171d809df1896c Greg Ungerer 2011-05-17 354 offset -= bit; 171d809df1896c Greg Ungerer 2011-05-17 355 171d809df1896c Greg Ungerer 2011-05-17 356 /* Look for zero in first longword */ 171d809df1896c Greg Ungerer 2011-05-17 357 __asm__ __volatile__ ("bfffo %1{#0,#0},%0" 171d809df1896c Greg Ungerer 2011-05-17 358 : "=d" (res) : "d" (num & -num)); 171d809df1896c Greg Ungerer 2011-05-17 359 if (res < 32) { 171d809df1896c Greg Ungerer 2011-05-17 360 offset += res ^ 31; 171d809df1896c Greg Ungerer 2011-05-17 361 return offset < size ? offset : size; 171d809df1896c Greg Ungerer 2011-05-17 362 } 171d809df1896c Greg Ungerer 2011-05-17 363 offset += 32; 171d809df1896c Greg Ungerer 2011-05-17 364 171d809df1896c Greg Ungerer 2011-05-17 365 if (offset >= size) 171d809df1896c Greg Ungerer 2011-05-17 366 return size; 171d809df1896c Greg Ungerer 2011-05-17 367 } 171d809df1896c Greg Ungerer 2011-05-17 368 /* No zero yet, search remaining full bytes for a zero */ 171d809df1896c Greg Ungerer 2011-05-17 369 return offset + find_first_zero_bit(p, size - offset); 171d809df1896c Greg Ungerer 2011-05-17 370 } 171d809df1896c Greg Ungerer 2011-05-17 371 #define find_next_zero_bit find_next_zero_bit 171d809df1896c Greg Ungerer 2011-05-17 372 171d809df1896c Greg Ungerer 2011-05-17 373 static inline int find_first_bit(const unsigned long *vaddr, unsigned size) 171d809df1896c Greg Ungerer 2011-05-17 374 { 171d809df1896c Greg Ungerer 2011-05-17 375 const unsigned long *p = vaddr; 171d809df1896c Greg Ungerer 2011-05-17 376 int res = 32; 171d809df1896c Greg Ungerer 2011-05-17 377 unsigned int words; 171d809df1896c Greg Ungerer 2011-05-17 378 unsigned long num; 171d809df1896c Greg Ungerer 2011-05-17 379 171d809df1896c Greg Ungerer 2011-05-17 380 if (!size) 171d809df1896c Greg Ungerer 2011-05-17 381 return 0; 171d809df1896c Greg Ungerer 2011-05-17 382 171d809df1896c Greg Ungerer 2011-05-17 383 words = (size + 31) >> 5; 171d809df1896c Greg Ungerer 2011-05-17 384 while (!(num = *p++)) { 171d809df1896c Greg Ungerer 2011-05-17 385 if (!--words) 171d809df1896c Greg Ungerer 2011-05-17 386 goto out; 171d809df1896c Greg Ungerer 2011-05-17 387 } 171d809df1896c Greg Ungerer 2011-05-17 388 171d809df1896c Greg Ungerer 2011-05-17 389 __asm__ __volatile__ ("bfffo %1{#0,#0},%0" 171d809df1896c Greg Ungerer 2011-05-17 390 : "=d" (res) : "d" (num & -num)); 171d809df1896c Greg Ungerer 2011-05-17 391 res ^= 31; 171d809df1896c Greg Ungerer 2011-05-17 392 out: 171d809df1896c Greg Ungerer 2011-05-17 393 res += ((long)p - (long)vaddr - 4) * 8; 171d809df1896c Greg Ungerer 2011-05-17 394 return res < size ? res : size; 171d809df1896c Greg Ungerer 2011-05-17 395 } 171d809df1896c Greg Ungerer 2011-05-17 @396 #define find_first_bit find_first_bit 171d809df1896c Greg Ungerer 2011-05-17 397 :::::: The code at line 396 was first introduced by commit :::::: 171d809df1896c1022f9778cd2788be6c255a7dc m68k: merge mmu and non-mmu bitops.h :::::: TO: Greg Ungerer <gerg(a)uclinux.org&gt; :::::: CC: Greg Ungerer <gerg(a)uclinux.org&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org