Hi Mike, I love your patch! Yet something to improve: [auto build test ERROR on arm/for-next] [also build test ERROR on arm64/for-next/core kvmarm/next v5.5-rc4 next-20191220] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system. BTW, we also suggest to use '--base' option to specify the base tree in git format-patch, please see https://stackoverflow.com/a/37406982] url: https://github.com/0day-ci/linux/commits/Mike-Rapoport/arm-arm64-add-support-for-folded-p4d-page-tables/20191230-172112 base: git://git.armlinux.org.uk/~rmk/linux-arm.git for-next config: arm64-randconfig-a001-20191229 (attached as .config) compiler: aarch64-linux-gcc (GCC) 7.5.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # save the attached .config to linux build tree GCC_VERSION=7.5.0 make.cross ARCH=arm64 If you fix the issue, kindly add following tag Reported-by: kbuild test robot <lkp@xxxxxxxxx> All error/warnings (new ones prefixed by >>): arch/arm64/mm/dump.c: In function 'walk_p4d': >> arch/arm64/mm/dump.c:358:24: error: implicit declaration of function 'p4d_sect'; did you mean 'pud_sect'? [-Werror=implicit-function-declaration] if (p4d_none(p4d) || p4d_sect(p4d)) { ^~~~~~~~ pud_sect cc1: some warnings being treated as errors -- arch/arm64/mm/kasan_init.c: In function 'kasan_p4d_offset': >> arch/arm64/mm/kasan_init.c:112:17: error: implicit declaration of function 'p4d_offset_kimg'; did you mean 'pmd_offset_kimg'? [-Werror=implicit-function-declaration] return early ? p4d_offset_kimg(pgdp, addr) : p4d_offset(pgdp, addr); ^~~~~~~~~~~~~~~ pmd_offset_kimg >> arch/arm64/mm/kasan_init.c:112:45: warning: pointer/integer type mismatch in conditional expression return early ? p4d_offset_kimg(pgdp, addr) : p4d_offset(pgdp, addr); ^ arch/arm64/mm/kasan_init.c: In function 'kasan_p4d_populate': >> arch/arm64/mm/kasan_init.c:164:22: error: passing argument 1 of 'kasan_pmd_populate' from incompatible pointer type [-Werror=incompatible-pointer-types] kasan_pmd_populate(p4dp, addr, next, node, early); ^~~~ arch/arm64/mm/kasan_init.c:132:20: note: expected 'pud_t * {aka struct <anonymous> *}' but argument is of type 'p4d_t * {aka struct <anonymous> *}' static void __init kasan_pmd_populate(pud_t *pudp, unsigned long addr, ^~~~~~~~~~~~~~~~~~ At top level: arch/arm64/mm/kasan_init.c:144:20: warning: 'kasan_pud_populate' defined but not used [-Wunused-function] static void __init kasan_pud_populate(p4d_t *p4dp, unsigned long addr, ^~~~~~~~~~~~~~~~~~ cc1: some warnings being treated as errors vim +358 arch/arm64/mm/dump.c 347 348 static void walk_p4d(struct pg_state *st, pgd_t *pgdp, unsigned long start, 349 unsigned long end) 350 { 351 unsigned long next, addr = start; 352 p4d_t *p4dp = p4d_offset(pgdp, start); 353 354 do { 355 p4d_t p4d = READ_ONCE(*p4dp); 356 next = p4d_addr_end(addr, end); 357 > 358 if (p4d_none(p4d) || p4d_sect(p4d)) { 359 note_page(st, addr, 2, p4d_val(p4d)); 360 } else { 361 BUG_ON(p4d_bad(p4d)); 362 walk_pud(st, p4dp, addr, next); 363 } 364 } while (p4dp++, addr = next, addr != end); 365 } 366 --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx Intel Corporation
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