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Message-ID: <202507050624.7hvmxJdI-lkp@intel.com>
Date: Sat, 5 Jul 2025 07:02:52 +0800
From: kernel test robot <lkp@...el.com>
To: Christian Marangi <ansuelsmth@...il.com>,
Uwe Kleine-König <ukleinek@...nel.org>,
linux-kernel@...r.kernel.org, linux-pwm@...r.kernel.org
Cc: oe-kbuild-all@...ts.linux.dev,
Benjamin Larsson <benjamin.larsson@...exis.eu>,
AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>,
Lorenzo Bianconi <lorenzo@...nel.org>,
Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
Christian Marangi <ansuelsmth@...il.com>
Subject: Re: [PATCH v20] pwm: airoha: Add support for EN7581 SoC
Hi Christian,
kernel test robot noticed the following build warnings:
[auto build test WARNING on linus/master]
[also build test WARNING on v6.16-rc4 next-20250704]
[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/Christian-Marangi/pwm-airoha-Add-support-for-EN7581-SoC/20250704-153259
base: linus/master
patch link: https://lore.kernel.org/r/20250704072807.9335-1-ansuelsmth%40gmail.com
patch subject: [PATCH v20] pwm: airoha: Add support for EN7581 SoC
config: openrisc-allyesconfig (https://download.01.org/0day-ci/archive/20250705/202507050624.7hvmxJdI-lkp@intel.com/config)
compiler: or1k-linux-gcc (GCC) 15.1.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250705/202507050624.7hvmxJdI-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@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202507050624.7hvmxJdI-lkp@intel.com/
All warnings (new ones prefixed by >>):
In file included from ./arch/openrisc/include/generated/asm/div64.h:1,
from include/linux/math.h:6,
from include/linux/kernel.h:27,
from include/linux/cpumask.h:11,
from include/linux/smp.h:13,
from include/linux/lockdep.h:14,
from include/linux/spinlock.h:63,
from include/linux/mmzone.h:8,
from include/linux/gfp.h:7,
from include/linux/mm.h:7,
from arch/openrisc/include/asm/pgalloc.h:20,
from arch/openrisc/include/asm/io.h:18,
from include/linux/io.h:12,
from drivers/pwm/pwm-airoha.c:20:
drivers/pwm/pwm-airoha.c: In function 'airoha_pwm_apply_bucket_config':
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)); \
| ^~
drivers/pwm/pwm-airoha.c:270:17: note: in expansion of macro 'do_div'
270 | shift = do_div(offset, AIROHA_PWM_BUCKET_PER_CYCLE_CFG);
| ^~~~~~
In file included from include/linux/array_size.h:5,
from drivers/pwm/pwm-airoha.c:16:
>> 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)
| ^
drivers/pwm/pwm-airoha.c:270:17: note: in expansion of macro 'do_div'
270 | shift = do_div(offset, AIROHA_PWM_BUCKET_PER_CYCLE_CFG);
| ^~~~~~
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); \
| ^~~~
| |
| u32 * {aka unsigned int *}
drivers/pwm/pwm-airoha.c:270:17: note: in expansion of macro 'do_div'
270 | shift = do_div(offset, AIROHA_PWM_BUCKET_PER_CYCLE_CFG);
| ^~~~~~
include/asm-generic/div64.h:174:38: note: expected 'uint64_t *' {aka 'long long unsigned int *'} but argument is of type 'u32 *' {aka '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)); \
| ^~
drivers/pwm/pwm-airoha.c:282:17: note: in expansion of macro 'do_div'
282 | shift = do_div(offset, AIROHA_PWM_BUCKET_PER_FLASH_PROD);
| ^~~~~~
>> 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)
| ^
drivers/pwm/pwm-airoha.c:282:17: note: in expansion of macro 'do_div'
282 | shift = do_div(offset, AIROHA_PWM_BUCKET_PER_FLASH_PROD);
| ^~~~~~
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); \
| ^~~~
| |
| u32 * {aka unsigned int *}
drivers/pwm/pwm-airoha.c:282:17: note: in expansion of macro 'do_div'
282 | shift = do_div(offset, AIROHA_PWM_BUCKET_PER_FLASH_PROD);
| ^~~~~~
include/asm-generic/div64.h:174:38: note: expected 'uint64_t *' {aka 'long long unsigned int *'} but argument is of type 'u32 *' {aka 'unsigned int *'}
174 | extern uint32_t __div64_32(uint64_t *dividend, uint32_t divisor);
| ~~~~~~~~~~^~~~~~~~
vim +195 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
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