From: kernel test robot <lkp@intel.com>
To: cem@kernel.org
Cc: oe-kbuild-all@lists.linux.dev
Subject: Re: [RFC PATCH] math.h: Account for 64-bit division on i386
Date: Sun, 20 Apr 2025 02:28:10 +0800 [thread overview]
Message-ID: <202504200218.98vwdj3m-lkp@intel.com> (raw)
In-Reply-To: <20250419115157.567249-1-cem@kernel.org>
Hi,
[This is a private test report for your RFC patch.]
kernel test robot noticed the following build errors:
[auto build test ERROR on linus/master]
[also build test ERROR on hch-configfs/for-next v6.15-rc2 next-20250417]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]
url: https://github.com/intel-lab-lkp/linux/commits/cem-kernel-org/math-h-Account-for-64-bit-division-on-i386/20250419-195242
base: linus/master
patch link: https://lore.kernel.org/r/20250419115157.567249-1-cem%40kernel.org
patch subject: [RFC PATCH] math.h: Account for 64-bit division on i386
config: csky-randconfig-002-20250420 (https://download.01.org/0day-ci/archive/20250420/202504200218.98vwdj3m-lkp@intel.com/config)
compiler: csky-linux-gcc (GCC) 14.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250420/202504200218.98vwdj3m-lkp@intel.com/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 <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202504200218.98vwdj3m-lkp@intel.com/
All error/warnings (new ones prefixed by >>):
In file included from ./arch/csky/include/generated/asm/div64.h:1,
from include/linux/math.h:6,
from include/linux/math64.h:6,
from include/linux/time.h:6,
from include/linux/stat.h:19,
from include/linux/module.h:13,
from drivers/power/supply/ltc4162-l-charger.c:12:
drivers/power/supply/ltc4162-l-charger.c: In function 'ltc4162l_get_ibat':
include/asm-generic/div64.h:183:35: warning: comparison of distinct pointer types lacks a cast [-Wcompare-distinct-pointer-types]
183 | (void)(((typeof((n)) *)0) == ((uint64_t *)0)); \
| ^~
include/linux/math.h:142:24: note: in expansion of macro 'do_div'
142 | typeof(x_) r = do_div(x_, d_); \
| ^~~~~~
drivers/power/supply/ltc4162-l-charger.c:360:23: note: in expansion of macro 'mult_frac'
360 | val->intval = mult_frac(ret, chip_info->ibat_resolution_pv, info->rsnsb);
| ^~~~~~~~~
In file included from include/linux/build_bug.h:5,
from include/linux/bitfield.h:10,
from drivers/power/supply/ltc4162-l-charger.c:11:
>> include/asm-generic/div64.h:195:32: warning: right shift count >= width of type [-Wshift-count-overflow]
195 | } else if (likely(((n) >> 32) == 0)) { \
| ^~
include/linux/compiler.h:76:45: note: in definition of macro 'likely'
76 | # define likely(x) __builtin_expect(!!(x), 1)
| ^
include/linux/math.h:142:24: note: in expansion of macro 'do_div'
142 | typeof(x_) r = do_div(x_, d_); \
| ^~~~~~
drivers/power/supply/ltc4162-l-charger.c:360:23: note: in expansion of macro 'mult_frac'
360 | val->intval = mult_frac(ret, chip_info->ibat_resolution_pv, info->rsnsb);
| ^~~~~~~~~
>> include/asm-generic/div64.h:199:36: error: passing argument 1 of '__div64_32' from incompatible pointer type [-Wincompatible-pointer-types]
199 | __rem = __div64_32(&(n), __base); \
| ^~~~
| |
| int *
include/linux/math.h:142:24: note: in expansion of macro 'do_div'
142 | typeof(x_) r = do_div(x_, d_); \
| ^~~~~~
drivers/power/supply/ltc4162-l-charger.c:360:23: note: in expansion of macro 'mult_frac'
360 | val->intval = mult_frac(ret, chip_info->ibat_resolution_pv, info->rsnsb);
| ^~~~~~~~~
include/asm-generic/div64.h:174:38: note: expected 'uint64_t *' {aka 'long long unsigned int *'} but argument is of type 'int *'
174 | extern uint32_t __div64_32(uint64_t *dividend, uint32_t divisor);
| ~~~~~~~~~~^~~~~~~~
include/asm-generic/div64.h:183:35: warning: comparison of distinct pointer types lacks a cast [-Wcompare-distinct-pointer-types]
183 | (void)(((typeof((n)) *)0) == ((uint64_t *)0)); \
| ^~
include/linux/math.h:144:9: note: in expansion of macro 'do_div'
144 | do_div(r, d_); \
| ^~~~~~
drivers/power/supply/ltc4162-l-charger.c:360:23: note: in expansion of macro 'mult_frac'
360 | val->intval = mult_frac(ret, chip_info->ibat_resolution_pv, info->rsnsb);
| ^~~~~~~~~
>> include/asm-generic/div64.h:195:32: warning: right shift count >= width of type [-Wshift-count-overflow]
195 | } else if (likely(((n) >> 32) == 0)) { \
| ^~
include/linux/compiler.h:76:45: note: in definition of macro 'likely'
76 | # define likely(x) __builtin_expect(!!(x), 1)
| ^
include/linux/math.h:144:9: note: in expansion of macro 'do_div'
144 | do_div(r, d_); \
| ^~~~~~
drivers/power/supply/ltc4162-l-charger.c:360:23: note: in expansion of macro 'mult_frac'
360 | val->intval = mult_frac(ret, chip_info->ibat_resolution_pv, info->rsnsb);
| ^~~~~~~~~
>> include/asm-generic/div64.h:199:36: error: passing argument 1 of '__div64_32' from incompatible pointer type [-Wincompatible-pointer-types]
199 | __rem = __div64_32(&(n), __base); \
| ^~~~
| |
| int *
include/linux/math.h:144:9: note: in expansion of macro 'do_div'
144 | do_div(r, d_); \
| ^~~~~~
drivers/power/supply/ltc4162-l-charger.c:360:23: note: in expansion of macro 'mult_frac'
360 | val->intval = mult_frac(ret, chip_info->ibat_resolution_pv, info->rsnsb);
| ^~~~~~~~~
include/asm-generic/div64.h:174:38: note: expected 'uint64_t *' {aka 'long long unsigned int *'} but argument is of type 'int *'
174 | extern uint32_t __div64_32(uint64_t *dividend, uint32_t divisor);
| ~~~~~~~~~~^~~~~~~~
drivers/power/supply/ltc4162-l-charger.c: In function 'ltc4162l_get_icharge':
include/asm-generic/div64.h:183:35: warning: comparison of distinct pointer types lacks a cast [-Wcompare-distinct-pointer-types]
183 | (void)(((typeof((n)) *)0) == ((uint64_t *)0)); \
| ^~
include/linux/math.h:142:24: note: in expansion of macro 'do_div'
142 | typeof(x_) r = do_div(x_, d_); \
| ^~~~~~
drivers/power/supply/ltc4162-l-charger.c:417:32: note: in expansion of macro 'mult_frac'
417 | val->intval = 10000u * mult_frac(regval, 100000u, info->rsnsb);
| ^~~~~~~~~
>> include/asm-generic/div64.h:195:32: warning: right shift count >= width of type [-Wshift-count-overflow]
195 | } else if (likely(((n) >> 32) == 0)) { \
| ^~
include/linux/compiler.h:76:45: note: in definition of macro 'likely'
76 | # define likely(x) __builtin_expect(!!(x), 1)
| ^
include/linux/math.h:142:24: note: in expansion of macro 'do_div'
142 | typeof(x_) r = do_div(x_, d_); \
| ^~~~~~
drivers/power/supply/ltc4162-l-charger.c:417:32: note: in expansion of macro 'mult_frac'
417 | val->intval = 10000u * mult_frac(regval, 100000u, info->rsnsb);
| ^~~~~~~~~
>> include/asm-generic/div64.h:199:36: error: passing argument 1 of '__div64_32' from incompatible pointer type [-Wincompatible-pointer-types]
199 | __rem = __div64_32(&(n), __base); \
| ^~~~
| |
| unsigned int *
include/linux/math.h:142:24: note: in expansion of macro 'do_div'
142 | typeof(x_) r = do_div(x_, d_); \
| ^~~~~~
drivers/power/supply/ltc4162-l-charger.c:417:32: note: in expansion of macro 'mult_frac'
417 | val->intval = 10000u * mult_frac(regval, 100000u, info->rsnsb);
| ^~~~~~~~~
include/asm-generic/div64.h:174:38: note: expected 'uint64_t *' {aka 'long long unsigned int *'} but argument is of type 'unsigned int *'
174 | extern uint32_t __div64_32(uint64_t *dividend, uint32_t divisor);
| ~~~~~~~~~~^~~~~~~~
include/asm-generic/div64.h:183:35: warning: comparison of distinct pointer types lacks a cast [-Wcompare-distinct-pointer-types]
183 | (void)(((typeof((n)) *)0) == ((uint64_t *)0)); \
| ^~
include/linux/math.h:144:9: note: in expansion of macro 'do_div'
144 | do_div(r, d_); \
| ^~~~~~
drivers/power/supply/ltc4162-l-charger.c:417:32: note: in expansion of macro 'mult_frac'
417 | val->intval = 10000u * mult_frac(regval, 100000u, info->rsnsb);
| ^~~~~~~~~
>> include/asm-generic/div64.h:195:32: warning: right shift count >= width of type [-Wshift-count-overflow]
195 | } else if (likely(((n) >> 32) == 0)) { \
| ^~
include/linux/compiler.h:76:45: note: in definition of macro 'likely'
76 | # define likely(x) __builtin_expect(!!(x), 1)
| ^
include/linux/math.h:144:9: note: in expansion of macro 'do_div'
144 | do_div(r, d_); \
| ^~~~~~
drivers/power/supply/ltc4162-l-charger.c:417:32: note: in expansion of macro 'mult_frac'
417 | val->intval = 10000u * mult_frac(regval, 100000u, info->rsnsb);
| ^~~~~~~~~
>> include/asm-generic/div64.h:199:36: error: passing argument 1 of '__div64_32' from incompatible pointer type [-Wincompatible-pointer-types]
199 | __rem = __div64_32(&(n), __base); \
| ^~~~
| |
| unsigned int *
include/linux/math.h:144:9: note: in expansion of macro 'do_div'
144 | do_div(r, d_); \
| ^~~~~~
drivers/power/supply/ltc4162-l-charger.c:417:32: note: in expansion of macro 'mult_frac'
417 | val->intval = 10000u * mult_frac(regval, 100000u, info->rsnsb);
| ^~~~~~~~~
include/asm-generic/div64.h:174:38: note: expected 'uint64_t *' {aka 'long long unsigned int *'} but argument is of type 'unsigned int *'
174 | extern uint32_t __div64_32(uint64_t *dividend, uint32_t divisor);
| ~~~~~~~~~~^~~~~~~~
drivers/power/supply/ltc4162-l-charger.c: In function 'ltc4162l_set_icharge':
include/asm-generic/div64.h:183:35: warning: comparison of distinct pointer types lacks a cast [-Wcompare-distinct-pointer-types]
183 | (void)(((typeof((n)) *)0) == ((uint64_t *)0)); \
| ^~
include/linux/math.h:142:24: note: in expansion of macro 'do_div'
142 | typeof(x_) r = do_div(x_, d_); \
| ^~~~~~
drivers/power/supply/ltc4162-l-charger.c:426:17: note: in expansion of macro 'mult_frac'
426 | value = mult_frac(value, info->rsnsb, 100000u);
| ^~~~~~~~~
>> include/asm-generic/div64.h:195:32: warning: right shift count >= width of type [-Wshift-count-overflow]
195 | } else if (likely(((n) >> 32) == 0)) { \
| ^~
include/linux/compiler.h:76:45: note: in definition of macro 'likely'
76 | # define likely(x) __builtin_expect(!!(x), 1)
| ^
include/linux/math.h:142:24: note: in expansion of macro 'do_div'
142 | typeof(x_) r = do_div(x_, d_); \
| ^~~~~~
drivers/power/supply/ltc4162-l-charger.c:426:17: note: in expansion of macro 'mult_frac'
426 | value = mult_frac(value, info->rsnsb, 100000u);
| ^~~~~~~~~
>> include/asm-generic/div64.h:199:36: error: passing argument 1 of '__div64_32' from incompatible pointer type [-Wincompatible-pointer-types]
199 | __rem = __div64_32(&(n), __base); \
| ^~~~
| |
| unsigned int *
include/linux/math.h:142:24: note: in expansion of macro 'do_div'
142 | typeof(x_) r = do_div(x_, d_); \
| ^~~~~~
drivers/power/supply/ltc4162-l-charger.c:426:17: note: in expansion of macro 'mult_frac'
426 | value = mult_frac(value, info->rsnsb, 100000u);
| ^~~~~~~~~
include/asm-generic/div64.h:174:38: note: expected 'uint64_t *' {aka 'long long unsigned int *'} but argument is of type 'unsigned int *'
174 | extern uint32_t __div64_32(uint64_t *dividend, uint32_t divisor);
| ~~~~~~~~~~^~~~~~~~
include/asm-generic/div64.h:183:35: warning: comparison of distinct pointer types lacks a cast [-Wcompare-distinct-pointer-types]
183 | (void)(((typeof((n)) *)0) == ((uint64_t *)0)); \
| ^~
include/linux/math.h:144:9: note: in expansion of macro 'do_div'
144 | do_div(r, d_); \
| ^~~~~~
drivers/power/supply/ltc4162-l-charger.c:426:17: note: in expansion of macro 'mult_frac'
426 | value = mult_frac(value, info->rsnsb, 100000u);
| ^~~~~~~~~
>> include/asm-generic/div64.h:195:32: warning: right shift count >= width of type [-Wshift-count-overflow]
195 | } else if (likely(((n) >> 32) == 0)) { \
| ^~
include/linux/compiler.h:76:45: note: in definition of macro 'likely'
76 | # define likely(x) __builtin_expect(!!(x), 1)
| ^
include/linux/math.h:144:9: note: in expansion of macro 'do_div'
144 | do_div(r, d_); \
| ^~~~~~
drivers/power/supply/ltc4162-l-charger.c:426:17: note: in expansion of macro 'mult_frac'
426 | value = mult_frac(value, info->rsnsb, 100000u);
| ^~~~~~~~~
>> include/asm-generic/div64.h:199:36: error: passing argument 1 of '__div64_32' from incompatible pointer type [-Wincompatible-pointer-types]
199 | __rem = __div64_32(&(n), __base); \
| ^~~~
| |
| unsigned int *
include/linux/math.h:144:9: note: in expansion of macro 'do_div'
144 | do_div(r, d_); \
| ^~~~~~
drivers/power/supply/ltc4162-l-charger.c:426:17: note: in expansion of macro 'mult_frac'
426 | value = mult_frac(value, info->rsnsb, 100000u);
| ^~~~~~~~~
include/asm-generic/div64.h:174:38: note: expected 'uint64_t *' {aka 'long long unsigned int *'} but argument is of type 'unsigned int *'
174 | extern uint32_t __div64_32(uint64_t *dividend, uint32_t divisor);
| ~~~~~~~~~~^~~~~~~~
drivers/power/supply/ltc4162-l-charger.c: In function 'ltc4015_get_vcharge':
include/asm-generic/div64.h:183:35: warning: comparison of distinct pointer types lacks a cast [-Wcompare-distinct-pointer-types]
183 | (void)(((typeof((n)) *)0) == ((uint64_t *)0)); \
| ^~
include/linux/math.h:142:24: note: in expansion of macro 'do_div'
142 | typeof(x_) r = do_div(x_, d_); \
| ^~~~~~
drivers/power/supply/ltc4162-l-charger.c:528:37: note: in expansion of macro 'mult_frac'
528 | voltage = 2000000 + mult_frac(regval, 1000000, 105);
| ^~~~~~~~~
>> include/asm-generic/div64.h:195:32: warning: right shift count >= width of type [-Wshift-count-overflow]
195 | } else if (likely(((n) >> 32) == 0)) { \
| ^~
include/linux/compiler.h:76:45: note: in definition of macro 'likely'
76 | # define likely(x) __builtin_expect(!!(x), 1)
| ^
include/linux/math.h:142:24: note: in expansion of macro 'do_div'
142 | typeof(x_) r = do_div(x_, d_); \
| ^~~~~~
drivers/power/supply/ltc4162-l-charger.c:528:37: note: in expansion of macro 'mult_frac'
528 | voltage = 2000000 + mult_frac(regval, 1000000, 105);
| ^~~~~~~~~
>> include/asm-generic/div64.h:199:36: error: passing argument 1 of '__div64_32' from incompatible pointer type [-Wincompatible-pointer-types]
199 | __rem = __div64_32(&(n), __base); \
| ^~~~
| |
| unsigned int *
include/linux/math.h:142:24: note: in expansion of macro 'do_div'
142 | typeof(x_) r = do_div(x_, d_); \
| ^~~~~~
drivers/power/supply/ltc4162-l-charger.c:528:37: note: in expansion of macro 'mult_frac'
528 | voltage = 2000000 + mult_frac(regval, 1000000, 105);
| ^~~~~~~~~
include/asm-generic/div64.h:174:38: note: expected 'uint64_t *' {aka 'long long unsigned int *'} but argument is of type 'unsigned int *'
174 | extern uint32_t __div64_32(uint64_t *dividend, uint32_t divisor);
| ~~~~~~~~~~^~~~~~~~
include/asm-generic/div64.h:183:35: warning: comparison of distinct pointer types lacks a cast [-Wcompare-distinct-pointer-types]
183 | (void)(((typeof((n)) *)0) == ((uint64_t *)0)); \
| ^~
include/linux/math.h:144:9: note: in expansion of macro 'do_div'
144 | do_div(r, d_); \
| ^~~~~~
drivers/power/supply/ltc4162-l-charger.c:528:37: note: in expansion of macro 'mult_frac'
528 | voltage = 2000000 + mult_frac(regval, 1000000, 105);
| ^~~~~~~~~
>> include/asm-generic/div64.h:195:32: warning: right shift count >= width of type [-Wshift-count-overflow]
195 | } else if (likely(((n) >> 32) == 0)) { \
| ^~
include/linux/compiler.h:76:45: note: in definition of macro 'likely'
76 | # define likely(x) __builtin_expect(!!(x), 1)
| ^
include/linux/math.h:144:9: note: in expansion of macro 'do_div'
144 | do_div(r, d_); \
| ^~~~~~
drivers/power/supply/ltc4162-l-charger.c:528:37: note: in expansion of macro 'mult_frac'
528 | voltage = 2000000 + mult_frac(regval, 1000000, 105);
| ^~~~~~~~~
>> include/asm-generic/div64.h:199:36: error: passing argument 1 of '__div64_32' from incompatible pointer type [-Wincompatible-pointer-types]
199 | __rem = __div64_32(&(n), __base); \
| ^~~~
| |
| unsigned int *
include/linux/math.h:144:9: note: in expansion of macro 'do_div'
144 | do_div(r, d_); \
| ^~~~~~
drivers/power/supply/ltc4162-l-charger.c:528:37: note: in expansion of macro 'mult_frac'
528 | voltage = 2000000 + mult_frac(regval, 1000000, 105);
| ^~~~~~~~~
include/asm-generic/div64.h:174:38: note: expected 'uint64_t *' {aka 'long long unsigned int *'} but argument is of type 'unsigned int *'
174 | extern uint32_t __div64_32(uint64_t *dividend, uint32_t divisor);
| ~~~~~~~~~~^~~~~~~~
drivers/power/supply/ltc4162-l-charger.c: In function 'ltc4162l_set_iin_limit':
include/asm-generic/div64.h:183:35: warning: comparison of distinct pointer types lacks a cast [-Wcompare-distinct-pointer-types]
183 | (void)(((typeof((n)) *)0) == ((uint64_t *)0)); \
| ^~
include/linux/math.h:142:24: note: in expansion of macro 'do_div'
142 | typeof(x_) r = do_div(x_, d_); \
| ^~~~~~
drivers/power/supply/ltc4162-l-charger.c:655:18: note: in expansion of macro 'mult_frac'
655 | regval = mult_frac(value, info->rsnsi, 50000u);
| ^~~~~~~~~
>> include/asm-generic/div64.h:195:32: warning: right shift count >= width of type [-Wshift-count-overflow]
195 | } else if (likely(((n) >> 32) == 0)) { \
| ^~
include/linux/compiler.h:76:45: note: in definition of macro 'likely'
76 | # define likely(x) __builtin_expect(!!(x), 1)
| ^
include/linux/math.h:142:24: note: in expansion of macro 'do_div'
142 | typeof(x_) r = do_div(x_, d_); \
| ^~~~~~
drivers/power/supply/ltc4162-l-charger.c:655:18: note: in expansion of macro 'mult_frac'
655 | regval = mult_frac(value, info->rsnsi, 50000u);
| ^~~~~~~~~
>> include/asm-generic/div64.h:199:36: error: passing argument 1 of '__div64_32' from incompatible pointer type [-Wincompatible-pointer-types]
199 | __rem = __div64_32(&(n), __base); \
| ^~~~
| |
| unsigned int *
include/linux/math.h:142:24: note: in expansion of macro 'do_div'
142 | typeof(x_) r = do_div(x_, d_); \
| ^~~~~~
drivers/power/supply/ltc4162-l-charger.c:655:18: note: in expansion of macro 'mult_frac'
655 | regval = mult_frac(value, info->rsnsi, 50000u);
| ^~~~~~~~~
include/asm-generic/div64.h:174:38: note: expected 'uint64_t *' {aka 'long long unsigned int *'} but argument is of type 'unsigned int *'
174 | extern uint32_t __div64_32(uint64_t *dividend, uint32_t divisor);
| ~~~~~~~~~~^~~~~~~~
include/asm-generic/div64.h:183:35: warning: comparison of distinct pointer types lacks a cast [-Wcompare-distinct-pointer-types]
183 | (void)(((typeof((n)) *)0) == ((uint64_t *)0)); \
| ^~
include/linux/math.h:144:9: note: in expansion of macro 'do_div'
144 | do_div(r, d_); \
| ^~~~~~
drivers/power/supply/ltc4162-l-charger.c:655:18: note: in expansion of macro 'mult_frac'
655 | regval = mult_frac(value, info->rsnsi, 50000u);
| ^~~~~~~~~
>> include/asm-generic/div64.h:195:32: warning: right shift count >= width of type [-Wshift-count-overflow]
195 | } else if (likely(((n) >> 32) == 0)) { \
| ^~
include/linux/compiler.h:76:45: note: in definition of macro 'likely'
76 | # define likely(x) __builtin_expect(!!(x), 1)
| ^
include/linux/math.h:144:9: note: in expansion of macro 'do_div'
144 | do_div(r, d_); \
| ^~~~~~
drivers/power/supply/ltc4162-l-charger.c:655:18: note: in expansion of macro 'mult_frac'
655 | regval = mult_frac(value, info->rsnsi, 50000u);
| ^~~~~~~~~
>> include/asm-generic/div64.h:199:36: error: passing argument 1 of '__div64_32' from incompatible pointer type [-Wincompatible-pointer-types]
199 | __rem = __div64_32(&(n), __base); \
| ^~~~
| |
| unsigned int *
include/linux/math.h:144:9: note: in expansion of macro 'do_div'
144 | do_div(r, d_); \
| ^~~~~~
drivers/power/supply/ltc4162-l-charger.c:655:18: note: in expansion of macro 'mult_frac'
655 | regval = mult_frac(value, info->rsnsi, 50000u);
| ^~~~~~~~~
include/asm-generic/div64.h:174:38: note: expected 'uint64_t *' {aka 'long long unsigned int *'} but argument is of type 'unsigned int *'
174 | extern uint32_t __div64_32(uint64_t *dividend, uint32_t divisor);
| ~~~~~~~~~~^~~~~~~~
drivers/power/supply/ltc4162-l-charger.c: In function 'ltc4162l_set_term_current':
include/asm-generic/div64.h:183:35: warning: comparison of distinct pointer types lacks a cast [-Wcompare-distinct-pointer-types]
183 | (void)(((typeof((n)) *)0) == ((uint64_t *)0)); \
| ^~
include/linux/math.h:142:24: note: in expansion of macro 'do_div'
142 | typeof(x_) r = do_div(x_, d_); \
| ^~~~~~
drivers/power/supply/ltc4162-l-charger.c:746:18: note: in expansion of macro 'mult_frac'
746 | regval = mult_frac(value, info->rsnsb, 14660u);
| ^~~~~~~~~
include/asm-generic/div64.h:195:32: warning: right shift count >= width of type [-Wshift-count-overflow]
195 | } else if (likely(((n) >> 32) == 0)) { \
| ^~
include/linux/compiler.h:76:45: note: in definition of macro 'likely'
76 | # define likely(x) __builtin_expect(!!(x), 1)
| ^
include/linux/math.h:142:24: note: in expansion of macro 'do_div'
142 | typeof(x_) r = do_div(x_, d_); \
| ^~~~~~
drivers/power/supply/ltc4162-l-charger.c:746:18: note: in expansion of macro 'mult_frac'
746 | regval = mult_frac(value, info->rsnsb, 14660u);
| ^~~~~~~~~
include/asm-generic/div64.h:199:36: error: passing argument 1 of '__div64_32' from incompatible pointer type [-Wincompatible-pointer-types]
199 | __rem = __div64_32(&(n), __base); \
| ^~~~
| |
| unsigned int *
include/linux/math.h:142:24: note: in expansion of macro 'do_div'
142 | typeof(x_) r = do_div(x_, d_); \
| ^~~~~~
drivers/power/supply/ltc4162-l-charger.c:746:18: note: in expansion of macro 'mult_frac'
746 | regval = mult_frac(value, info->rsnsb, 14660u);
| ^~~~~~~~~
include/asm-generic/div64.h:174:38: note: expected 'uint64_t *' {aka 'long long unsigned int *'} but argument is of type 'unsigned int *'
174 | extern uint32_t __div64_32(uint64_t *dividend, uint32_t divisor);
| ~~~~~~~~~~^~~~~~~~
include/asm-generic/div64.h:183:35: warning: comparison of distinct pointer types lacks a cast [-Wcompare-distinct-pointer-types]
183 | (void)(((typeof((n)) *)0) == ((uint64_t *)0)); \
| ^~
include/linux/math.h:144:9: note: in expansion of macro 'do_div'
144 | do_div(r, d_); \
| ^~~~~~
drivers/power/supply/ltc4162-l-charger.c:746:18: note: in expansion of macro 'mult_frac'
746 | regval = mult_frac(value, info->rsnsb, 14660u);
| ^~~~~~~~~
include/asm-generic/div64.h:195:32: warning: right shift count >= width of type [-Wshift-count-overflow]
195 | } else if (likely(((n) >> 32) == 0)) { \
| ^~
include/linux/compiler.h:76:45: note: in definition of macro 'likely'
76 | # define likely(x) __builtin_expect(!!(x), 1)
| ^
include/linux/math.h:144:9: note: in expansion of macro 'do_div'
144 | do_div(r, d_); \
| ^~~~~~
drivers/power/supply/ltc4162-l-charger.c:746:18: note: in expansion of macro 'mult_frac'
746 | regval = mult_frac(value, info->rsnsb, 14660u);
| ^~~~~~~~~
include/asm-generic/div64.h:199:36: error: passing argument 1 of '__div64_32' from incompatible pointer type [-Wincompatible-pointer-types]
199 | __rem = __div64_32(&(n), __base); \
| ^~~~
| |
| unsigned int *
include/linux/math.h:144:9: note: in expansion of macro 'do_div'
144 | do_div(r, d_); \
| ^~~~~~
drivers/power/supply/ltc4162-l-charger.c:746:18: note: in expansion of macro 'mult_frac'
746 | regval = mult_frac(value, info->rsnsb, 14660u);
| ^~~~~~~~~
include/asm-generic/div64.h:174:38: note: expected 'uint64_t *' {aka 'long long unsigned int *'} but argument is of type 'unsigned int *'
174 | extern uint32_t __div64_32(uint64_t *dividend, uint32_t divisor);
| ~~~~~~~~~~^~~~~~~~
vim +/__div64_32 +199 include/asm-generic/div64.h
^1da177e4c3f41 Linus Torvalds 2005-04-16 176
^1da177e4c3f41 Linus Torvalds 2005-04-16 177 /* The unnecessary pointer compare is there
^1da177e4c3f41 Linus Torvalds 2005-04-16 178 * to check for type safety (n must be 64bit)
^1da177e4c3f41 Linus Torvalds 2005-04-16 179 */
^1da177e4c3f41 Linus Torvalds 2005-04-16 180 # define do_div(n,base) ({ \
^1da177e4c3f41 Linus Torvalds 2005-04-16 181 uint32_t __base = (base); \
^1da177e4c3f41 Linus Torvalds 2005-04-16 182 uint32_t __rem; \
^1da177e4c3f41 Linus Torvalds 2005-04-16 183 (void)(((typeof((n)) *)0) == ((uint64_t *)0)); \
911918aa7ef6f8 Nicolas Pitre 2015-11-02 184 if (__builtin_constant_p(__base) && \
911918aa7ef6f8 Nicolas Pitre 2015-11-02 185 is_power_of_2(__base)) { \
911918aa7ef6f8 Nicolas Pitre 2015-11-02 186 __rem = (n) & (__base - 1); \
911918aa7ef6f8 Nicolas Pitre 2015-11-02 187 (n) >>= ilog2(__base); \
c747ce4706190e Geert Uytterhoeven 2021-08-11 188 } else if (__builtin_constant_p(__base) && \
461a5e51060c93 Nicolas Pitre 2015-10-30 189 __base != 0) { \
461a5e51060c93 Nicolas Pitre 2015-10-30 190 uint32_t __res_lo, __n_lo = (n); \
461a5e51060c93 Nicolas Pitre 2015-10-30 191 (n) = __div64_const32(n, __base); \
461a5e51060c93 Nicolas Pitre 2015-10-30 192 /* the remainder can be computed with 32-bit regs */ \
461a5e51060c93 Nicolas Pitre 2015-10-30 193 __res_lo = (n); \
461a5e51060c93 Nicolas Pitre 2015-10-30 194 __rem = __n_lo - __res_lo * __base; \
911918aa7ef6f8 Nicolas Pitre 2015-11-02 @195 } else if (likely(((n) >> 32) == 0)) { \
^1da177e4c3f41 Linus Torvalds 2005-04-16 196 __rem = (uint32_t)(n) % __base; \
^1da177e4c3f41 Linus Torvalds 2005-04-16 197 (n) = (uint32_t)(n) / __base; \
c747ce4706190e Geert Uytterhoeven 2021-08-11 198 } else { \
^1da177e4c3f41 Linus Torvalds 2005-04-16 @199 __rem = __div64_32(&(n), __base); \
c747ce4706190e Geert Uytterhoeven 2021-08-11 200 } \
^1da177e4c3f41 Linus Torvalds 2005-04-16 201 __rem; \
^1da177e4c3f41 Linus Torvalds 2005-04-16 202 })
^1da177e4c3f41 Linus Torvalds 2005-04-16 203
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
next prev parent reply other threads:[~2025-04-19 18:29 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-04-19 11:51 [RFC PATCH] math.h: Account for 64-bit division on i386 cem
2025-04-19 18:28 ` kernel test robot [this message]
2025-04-19 18:59 ` kernel test robot
2025-04-20 15:40 ` Guenter Roeck
2025-04-20 17:42 ` Guenter Roeck
2025-04-20 18:05 ` Carlos Maiolino
2025-04-23 7:02 ` Geert Uytterhoeven
2025-04-20 18:01 ` Carlos Maiolino
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