From: kbuild test robot <lkp@intel.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: kbuild-all@01.org, Linux Memory Management List <linux-mm@kvack.org>
Subject: [linux-next:master 6018/7290] include/asm-generic/div64.h:239:22: error: passing argument 1 of '__div64_32' from incompatible pointer type
Date: Thu, 19 Jul 2018 09:06:15 +0800 [thread overview]
Message-ID: <201807190908.oqBsoBLZ%fengguang.wu@intel.com> (raw)
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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@ppc970.osdl.org>
:::::: CC: Linus Torvalds <torvalds@ppc970.osdl.org>
---
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