tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: 0b742fe187f7b2cbe85810fa8992ffcc7654dfda commit: 13a67bcb35f56547c674569e0ba9f421d86c6b27 [6018/7290] psi-pressure-stall-information-for-cpu-memory-and-io-fix-fix config: arm-allmodconfig (attached as .config) compiler: arm-linux-gnueabi-gcc (Debian 7.2.0-11) 7.2.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross git checkout 13a67bcb35f56547c674569e0ba9f421d86c6b27 # save the attached .config to linux build tree GCC_VERSION=7.2.0 make.cross ARCH=arm All errors (new ones prefixed by >>): In file included from arch/arm/include/asm/div64.h:127:0, from include/linux/kernel.h:174, from include/asm-generic/bug.h:18, from arch/arm/include/asm/bug.h:60, from include/linux/bug.h:5, from include/linux/seq_file.h:7, from kernel//sched/psi.c:128: kernel//sched/psi.c: In function 'calc_avgs': include/asm-generic/div64.h:222:28: warning: comparison of distinct pointer types lacks a cast (void)(((typeof((n)) *)0) == ((uint64_t *)0)); \ ^ kernel//sched/psi.c:180:2: note: in expansion of macro 'do_div' do_div(pct, psi_period); ^~~~~~ In file included from include/linux/string.h:6:0, from include/linux/seq_file.h:6, from kernel//sched/psi.c:128: include/asm-generic/div64.h:235:25: warning: right shift count >= width of type [-Wshift-count-overflow] } else if (likely(((n) >> 32) == 0)) { \ ^ include/linux/compiler.h:76:40: note: in definition of macro 'likely' # define likely(x) __builtin_expect(!!(x), 1) ^ kernel//sched/psi.c:180:2: note: in expansion of macro 'do_div' do_div(pct, psi_period); ^~~~~~ In file included from arch/arm/include/asm/div64.h:127:0, from include/linux/kernel.h:174, from include/asm-generic/bug.h:18, from arch/arm/include/asm/bug.h:60, from include/linux/bug.h:5, from include/linux/seq_file.h:7, from kernel//sched/psi.c:128: >> include/asm-generic/div64.h:239:22: error: passing argument 1 of '__div64_32' from incompatible pointer type [-Werror=incompatible-pointer-types] __rem = __div64_32(&(n), __base); \ ^ kernel//sched/psi.c:180:2: note: in expansion of macro 'do_div' do_div(pct, psi_period); ^~~~~~ In file included from include/linux/kernel.h:174:0, from include/asm-generic/bug.h:18, from arch/arm/include/asm/bug.h:60, from include/linux/bug.h:5, from include/linux/seq_file.h:7, from kernel//sched/psi.c:128: arch/arm/include/asm/div64.h:33:24: note: expected 'uint64_t * {aka long long unsigned int *}' but argument is of type 'long unsigned int *' static inline uint32_t __div64_32(uint64_t *n, uint32_t base) ^~~~~~~~~~ cc1: some warnings being treated as errors -- In file included from arch/arm/include/asm/div64.h:127:0, from include/linux/kernel.h:174, from include/asm-generic/bug.h:18, from arch/arm/include/asm/bug.h:60, from include/linux/bug.h:5, from include/linux/seq_file.h:7, from kernel/sched/psi.c:128: kernel/sched/psi.c: In function 'calc_avgs': include/asm-generic/div64.h:222:28: warning: comparison of distinct pointer types lacks a cast (void)(((typeof((n)) *)0) == ((uint64_t *)0)); \ ^ kernel/sched/psi.c:180:2: note: in expansion of macro 'do_div' do_div(pct, psi_period); ^~~~~~ In file included from include/linux/string.h:6:0, from include/linux/seq_file.h:6, from kernel/sched/psi.c:128: include/asm-generic/div64.h:235:25: warning: right shift count >= width of type [-Wshift-count-overflow] } else if (likely(((n) >> 32) == 0)) { \ ^ include/linux/compiler.h:76:40: note: in definition of macro 'likely' # define likely(x) __builtin_expect(!!(x), 1) ^ kernel/sched/psi.c:180:2: note: in expansion of macro 'do_div' do_div(pct, psi_period); ^~~~~~ In file included from arch/arm/include/asm/div64.h:127:0, from include/linux/kernel.h:174, from include/asm-generic/bug.h:18, from arch/arm/include/asm/bug.h:60, from include/linux/bug.h:5, from include/linux/seq_file.h:7, from kernel/sched/psi.c:128: >> include/asm-generic/div64.h:239:22: error: passing argument 1 of '__div64_32' from incompatible pointer type [-Werror=incompatible-pointer-types] __rem = __div64_32(&(n), __base); \ ^ kernel/sched/psi.c:180:2: note: in expansion of macro 'do_div' do_div(pct, psi_period); ^~~~~~ In file included from include/linux/kernel.h:174:0, from include/asm-generic/bug.h:18, from arch/arm/include/asm/bug.h:60, from include/linux/bug.h:5, from include/linux/seq_file.h:7, from kernel/sched/psi.c:128: arch/arm/include/asm/div64.h:33:24: note: expected 'uint64_t * {aka long long unsigned int *}' but argument is of type 'long unsigned int *' static inline uint32_t __div64_32(uint64_t *n, uint32_t base) ^~~~~~~~~~ cc1: some warnings being treated as errors vim +/__div64_32 +239 include/asm-generic/div64.h ^1da177e Linus Torvalds 2005-04-16 215 ^1da177e Linus Torvalds 2005-04-16 216 /* The unnecessary pointer compare is there ^1da177e Linus Torvalds 2005-04-16 217 * to check for type safety (n must be 64bit) ^1da177e Linus Torvalds 2005-04-16 218 */ ^1da177e Linus Torvalds 2005-04-16 219 # define do_div(n,base) ({ \ ^1da177e Linus Torvalds 2005-04-16 220 uint32_t __base = (base); \ ^1da177e Linus Torvalds 2005-04-16 221 uint32_t __rem; \ ^1da177e Linus Torvalds 2005-04-16 222 (void)(((typeof((n)) *)0) == ((uint64_t *)0)); \ 911918aa Nicolas Pitre 2015-11-02 223 if (__builtin_constant_p(__base) && \ 911918aa Nicolas Pitre 2015-11-02 224 is_power_of_2(__base)) { \ 911918aa Nicolas Pitre 2015-11-02 225 __rem = (n) & (__base - 1); \ 911918aa Nicolas Pitre 2015-11-02 226 (n) >>= ilog2(__base); \ 461a5e51 Nicolas Pitre 2015-10-30 227 } else if (__div64_const32_is_OK && \ 461a5e51 Nicolas Pitre 2015-10-30 228 __builtin_constant_p(__base) && \ 461a5e51 Nicolas Pitre 2015-10-30 229 __base != 0) { \ 461a5e51 Nicolas Pitre 2015-10-30 230 uint32_t __res_lo, __n_lo = (n); \ 461a5e51 Nicolas Pitre 2015-10-30 231 (n) = __div64_const32(n, __base); \ 461a5e51 Nicolas Pitre 2015-10-30 232 /* the remainder can be computed with 32-bit regs */ \ 461a5e51 Nicolas Pitre 2015-10-30 233 __res_lo = (n); \ 461a5e51 Nicolas Pitre 2015-10-30 234 __rem = __n_lo - __res_lo * __base; \ 911918aa Nicolas Pitre 2015-11-02 235 } else if (likely(((n) >> 32) == 0)) { \ ^1da177e Linus Torvalds 2005-04-16 236 __rem = (uint32_t)(n) % __base; \ ^1da177e Linus Torvalds 2005-04-16 237 (n) = (uint32_t)(n) / __base; \ ^1da177e Linus Torvalds 2005-04-16 238 } else \ ^1da177e Linus Torvalds 2005-04-16 @239 __rem = __div64_32(&(n), __base); \ ^1da177e Linus Torvalds 2005-04-16 240 __rem; \ ^1da177e Linus Torvalds 2005-04-16 241 }) ^1da177e Linus Torvalds 2005-04-16 242 :::::: The code at line 239 was first introduced by commit :::::: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Linux-2.6.12-rc2 :::::: TO: Linus Torvalds <torvalds@xxxxxxxxxxxxxxx> :::::: CC: Linus Torvalds <torvalds@xxxxxxxxxxxxxxx> --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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