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Message-ID: <202508061722.0vTVFHLe-lkp@intel.com>
Date: Wed, 6 Aug 2025 17:41:44 +0800
From: kernel test robot <lkp@...el.com>
To: Yu Kuai <yukuai1@...weicloud.com>, yukuai3@...wei.com, axboe@...nel.dk,
akpm@...ux-foundation.org, ming.lei@...hat.com, dlemoal@...nel.org,
jack@...e.cz
Cc: oe-kbuild-all@...ts.linux.dev, linux-block@...r.kernel.org,
linux-kernel@...r.kernel.org, yukuai1@...weicloud.com,
yi.zhang@...wei.com, yangerkun@...wei.com, johnny.chenyi@...wei.com
Subject: Re: [PATCH v3 1/2] lib/sbitmap: convert shallow_depth from one word
to the whole sbitmap
Hi Yu,
kernel test robot noticed the following build errors:
[auto build test ERROR on axboe-block/for-next]
[also build test ERROR on linus/master v6.16 next-20250806]
[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/Yu-Kuai/lib-sbitmap-convert-shallow_depth-from-one-word-to-the-whole-sbitmap/20250806-100430
base: https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git for-next
patch link: https://lore.kernel.org/r/20250805073748.606294-2-yukuai1%40huaweicloud.com
patch subject: [PATCH v3 1/2] lib/sbitmap: convert shallow_depth from one word to the whole sbitmap
config: sparc-randconfig-001-20250806 (https://download.01.org/0day-ci/archive/20250806/202508061722.0vTVFHLe-lkp@intel.com/config)
compiler: sparc-linux-gcc (GCC) 11.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250806/202508061722.0vTVFHLe-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/202508061722.0vTVFHLe-lkp@intel.com/
All error/warnings (new ones prefixed by >>):
In file included from ./arch/sparc/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 arch/sparc/include/asm/smp_32.h:15,
from arch/sparc/include/asm/smp.h:7,
from arch/sparc/include/asm/switch_to_32.h:5,
from arch/sparc/include/asm/switch_to.h:7,
from arch/sparc/include/asm/ptrace.h:120,
from arch/sparc/include/asm/thread_info_32.h:19,
from arch/sparc/include/asm/thread_info.h:7,
from include/linux/thread_info.h:60,
from arch/sparc/include/asm/current.h:15,
from include/linux/sched.h:12,
from lib/sbitmap.c:7:
lib/sbitmap.c: In function '__map_depth_with_shallow':
include/asm-generic/div64.h:183:35: warning: comparison of distinct pointer types lacks a cast
183 | (void)(((typeof((n)) *)0) == ((uint64_t *)0)); \
| ^~
lib/sbitmap.c:222:20: note: in expansion of macro 'do_div'
222 | reminder = do_div(shallow_word_depth, sb->depth);
| ^~~~~~
In file included from arch/sparc/include/asm/bug.h:6,
from include/linux/bug.h:5,
from include/linux/thread_info.h:13,
from arch/sparc/include/asm/current.h:15,
from include/linux/sched.h:12,
from lib/sbitmap.c:7:
>> 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)
| ^
lib/sbitmap.c:222:20: note: in expansion of macro 'do_div'
222 | reminder = do_div(shallow_word_depth, sb->depth);
| ^~~~~~
In file included from ./arch/sparc/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 arch/sparc/include/asm/smp_32.h:15,
from arch/sparc/include/asm/smp.h:7,
from arch/sparc/include/asm/switch_to_32.h:5,
from arch/sparc/include/asm/switch_to.h:7,
from arch/sparc/include/asm/ptrace.h:120,
from arch/sparc/include/asm/thread_info_32.h:19,
from arch/sparc/include/asm/thread_info.h:7,
from include/linux/thread_info.h:60,
from arch/sparc/include/asm/current.h:15,
from include/linux/sched.h:12,
from lib/sbitmap.c:7:
>> include/asm-generic/div64.h:199:36: error: passing argument 1 of '__div64_32' from incompatible pointer type [-Werror=incompatible-pointer-types]
199 | __rem = __div64_32(&(n), __base); \
| ^~~~
| |
| unsigned int *
lib/sbitmap.c:222:20: note: in expansion of macro 'do_div'
222 | reminder = do_div(shallow_word_depth, sb->depth);
| ^~~~~~
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);
| ~~~~~~~~~~^~~~~~~~
cc1: some warnings being treated as errors
vim +/__div64_32 +199 include/asm-generic/div64.h
^1da177e4c3f415 Linus Torvalds 2005-04-16 176
^1da177e4c3f415 Linus Torvalds 2005-04-16 177 /* The unnecessary pointer compare is there
^1da177e4c3f415 Linus Torvalds 2005-04-16 178 * to check for type safety (n must be 64bit)
^1da177e4c3f415 Linus Torvalds 2005-04-16 179 */
^1da177e4c3f415 Linus Torvalds 2005-04-16 180 # define do_div(n,base) ({ \
^1da177e4c3f415 Linus Torvalds 2005-04-16 181 uint32_t __base = (base); \
^1da177e4c3f415 Linus Torvalds 2005-04-16 182 uint32_t __rem; \
^1da177e4c3f415 Linus Torvalds 2005-04-16 183 (void)(((typeof((n)) *)0) == ((uint64_t *)0)); \
911918aa7ef6f86 Nicolas Pitre 2015-11-02 184 if (__builtin_constant_p(__base) && \
911918aa7ef6f86 Nicolas Pitre 2015-11-02 185 is_power_of_2(__base)) { \
911918aa7ef6f86 Nicolas Pitre 2015-11-02 186 __rem = (n) & (__base - 1); \
911918aa7ef6f86 Nicolas Pitre 2015-11-02 187 (n) >>= ilog2(__base); \
c747ce4706190ef Geert Uytterhoeven 2021-08-11 188 } else if (__builtin_constant_p(__base) && \
461a5e51060c93f Nicolas Pitre 2015-10-30 189 __base != 0) { \
461a5e51060c93f Nicolas Pitre 2015-10-30 190 uint32_t __res_lo, __n_lo = (n); \
461a5e51060c93f Nicolas Pitre 2015-10-30 191 (n) = __div64_const32(n, __base); \
461a5e51060c93f Nicolas Pitre 2015-10-30 192 /* the remainder can be computed with 32-bit regs */ \
461a5e51060c93f Nicolas Pitre 2015-10-30 193 __res_lo = (n); \
461a5e51060c93f Nicolas Pitre 2015-10-30 194 __rem = __n_lo - __res_lo * __base; \
911918aa7ef6f86 Nicolas Pitre 2015-11-02 @195 } else if (likely(((n) >> 32) == 0)) { \
^1da177e4c3f415 Linus Torvalds 2005-04-16 196 __rem = (uint32_t)(n) % __base; \
^1da177e4c3f415 Linus Torvalds 2005-04-16 197 (n) = (uint32_t)(n) / __base; \
c747ce4706190ef Geert Uytterhoeven 2021-08-11 198 } else { \
^1da177e4c3f415 Linus Torvalds 2005-04-16 @199 __rem = __div64_32(&(n), __base); \
c747ce4706190ef Geert Uytterhoeven 2021-08-11 200 } \
^1da177e4c3f415 Linus Torvalds 2005-04-16 201 __rem; \
^1da177e4c3f415 Linus Torvalds 2005-04-16 202 })
^1da177e4c3f415 Linus Torvalds 2005-04-16 203
--
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https://github.com/intel/lkp-tests/wiki
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