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Message-ID: <202509191916.a0oRRfua-lkp@intel.com>
Date: Fri, 19 Sep 2025 19:33:12 +0800
From: kernel test robot <lkp@...el.com>
To: Ankur Arora <ankur.a.arora@...cle.com>, linux-kernel@...r.kernel.org,
linux-mm@...ck.org, x86@...nel.org
Cc: oe-kbuild-all@...ts.linux.dev, akpm@...ux-foundation.org,
david@...hat.com, bp@...en8.de, dave.hansen@...ux.intel.com,
hpa@...or.com, mingo@...hat.com, mjguzik@...il.com, luto@...nel.org,
peterz@...radead.org, acme@...nel.org, namhyung@...nel.org,
tglx@...utronix.de, willy@...radead.org, raghavendra.kt@....com,
boris.ostrovsky@...cle.com, konrad.wilk@...cle.com,
ankur.a.arora@...cle.com
Subject: Re: [PATCH v7 13/16] mm: memory: support clearing page ranges
Hi Ankur,
kernel test robot noticed the following build errors:
[auto build test ERROR on akpm-mm/mm-everything]
url: https://github.com/intel-lab-lkp/linux/commits/Ankur-Arora/perf-bench-mem-Remove-repetition-around-time-measurement/20250917-233045
base: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything
patch link: https://lore.kernel.org/r/20250917152418.4077386-14-ankur.a.arora%40oracle.com
patch subject: [PATCH v7 13/16] mm: memory: support clearing page ranges
config: arm-randconfig-001-20250919 (https://download.01.org/0day-ci/archive/20250919/202509191916.a0oRRfua-lkp@intel.com/config)
compiler: arm-linux-gnueabi-gcc (GCC) 12.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250919/202509191916.a0oRRfua-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/202509191916.a0oRRfua-lkp@intel.com/
All error/warnings (new ones prefixed by >>):
In file included from arch/arm/include/asm/thread_info.h:14,
from include/linux/thread_info.h:60,
from include/asm-generic/preempt.h:5,
from ./arch/arm/include/generated/asm/preempt.h:1,
from include/linux/preempt.h:79,
from include/linux/smp.h:116,
from include/linux/kernel_stat.h:5,
from mm/memory.c:42:
mm/memory.c: In function 'clear_contig_highpages':
mm/memory.c:7199:38: error: implicit declaration of function 'nth_page'; did you mean 'pte_page'? [-Werror=implicit-function-declaration]
7199 | clear_user_highpages(nth_page(page, i),
| ^~~~~~~~
arch/arm/include/asm/page.h:152:36: note: in definition of macro 'clear_user_highpage'
152 | __cpu_clear_user_highpage(page, vaddr)
| ^~~~
mm/memory.c:7199:17: note: in expansion of macro 'clear_user_highpages'
7199 | clear_user_highpages(nth_page(page, i),
| ^~~~~~~~~~~~~~~~~~~~
>> mm/memory.c:7199:38: warning: passing argument 1 of 'cpu_user.cpu_clear_user_highpage' makes pointer from integer without a cast [-Wint-conversion]
7199 | clear_user_highpages(nth_page(page, i),
| ^~~~~~~~~~~~~~~~~
| |
| int
arch/arm/include/asm/page.h:152:36: note: in definition of macro 'clear_user_highpage'
152 | __cpu_clear_user_highpage(page, vaddr)
| ^~~~
mm/memory.c:7199:17: note: in expansion of macro 'clear_user_highpages'
7199 | clear_user_highpages(nth_page(page, i),
| ^~~~~~~~~~~~~~~~~~~~
mm/memory.c:7199:38: note: expected 'struct page *' but argument is of type 'int'
7199 | clear_user_highpages(nth_page(page, i),
| ^~~~~~~~~~~~~~~~~
arch/arm/include/asm/page.h:152:36: note: in definition of macro 'clear_user_highpage'
152 | __cpu_clear_user_highpage(page, vaddr)
| ^~~~
mm/memory.c:7199:17: note: in expansion of macro 'clear_user_highpages'
7199 | clear_user_highpages(nth_page(page, i),
| ^~~~~~~~~~~~~~~~~~~~
>> arch/arm/include/asm/page.h:157:15: error: lvalue required as left operand of assignment
157 | vaddr += PAGE_SIZE; \
| ^~
mm/memory.c:7199:17: note: in expansion of macro 'clear_user_highpages'
7199 | clear_user_highpages(nth_page(page, i),
| ^~~~~~~~~~~~~~~~~~~~
>> arch/arm/include/asm/page.h:158:13: error: lvalue required as increment operand
158 | page++; \
| ^~
mm/memory.c:7199:17: note: in expansion of macro 'clear_user_highpages'
7199 | clear_user_highpages(nth_page(page, i),
| ^~~~~~~~~~~~~~~~~~~~
cc1: some warnings being treated as errors
vim +7199 mm/memory.c
7185
7186 /*
7187 * Clear contiguous pages chunking them up when running under
7188 * non-preemptible models.
7189 */
7190 static void clear_contig_highpages(struct page *page, unsigned long addr,
7191 unsigned int npages)
7192 {
7193 unsigned int i, count, unit;
7194
7195 unit = preempt_model_preemptible() ? npages : PAGE_CONTIG_NR;
7196
7197 for (i = 0; i < npages; ) {
7198 count = min(unit, npages - i);
> 7199 clear_user_highpages(nth_page(page, i),
7200 addr + i * PAGE_SIZE, count);
7201 i += count;
7202 cond_resched();
7203 }
7204 }
7205
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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