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Message-ID: <202511020603.NRNONOtT-lkp@intel.com>
Date: Sun, 2 Nov 2025 07:06:43 +0800
From: kernel test robot <lkp@...el.com>
To: Mateusz Guzik <mjguzik@...il.com>, brauner@...nel.org
Cc: oe-kbuild-all@...ts.linux.dev, viro@...iv.linux.org.uk, jack@...e.cz,
linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
torvalds@...ux-foundation.org, pfalcato@...e.de,
Mateusz Guzik <mjguzik@...il.com>
Subject: Re: [PATCH v4] fs: hide names_cachep behind runtime access machinery
Hi Mateusz,
kernel test robot noticed the following build errors:
[auto build test ERROR on arnd-asm-generic/master]
[also build test ERROR on linus/master linux/master v6.18-rc3 next-20251031]
[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/Mateusz-Guzik/fs-hide-names_cachep-behind-runtime-access-machinery/20251101-054539
base: https://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic.git master
patch link: https://lore.kernel.org/r/20251030105242.801528-1-mjguzik%40gmail.com
patch subject: [PATCH v4] fs: hide names_cachep behind runtime access machinery
config: riscv-randconfig-r111-20251102 (https://download.01.org/0day-ci/archive/20251102/202511020603.NRNONOtT-lkp@intel.com/config)
compiler: riscv64-linux-gcc (GCC) 11.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251102/202511020603.NRNONOtT-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/202511020603.NRNONOtT-lkp@intel.com/
All errors (new ones prefixed by >>):
In file included from arch/riscv/include/asm/runtime-const.h:7,
from include/linux/fs.h:53,
from include/linux/huge_mm.h:7,
from include/linux/mm.h:1016,
from arch/riscv/kernel/asm-offsets.c:8:
arch/riscv/include/asm/cacheflush.h: In function 'flush_cache_vmap':
arch/riscv/include/asm/cacheflush.h:49:13: error: implicit declaration of function 'is_vmalloc_or_module_addr' [-Werror=implicit-function-declaration]
49 | if (is_vmalloc_or_module_addr((void *)start)) {
| ^~~~~~~~~~~~~~~~~~~~~~~~~
In file included from include/linux/compat.h:18,
from arch/riscv/include/asm/elf.h:12,
from include/linux/elf.h:6,
from include/linux/module.h:20,
from include/linux/device/driver.h:21,
from include/linux/device.h:32,
from include/linux/node.h:18,
from include/linux/memory.h:19,
from arch/riscv/include/asm/runtime-const.h:9,
from include/linux/fs.h:53,
from include/linux/huge_mm.h:7,
from include/linux/mm.h:1016,
from arch/riscv/kernel/asm-offsets.c:8:
include/uapi/linux/aio_abi.h: At top level:
include/uapi/linux/aio_abi.h:79:9: error: unknown type name '__kernel_rwf_t'
79 | __kernel_rwf_t aio_rw_flags; /* RWF_* flags */
| ^~~~~~~~~~~~~~
In file included from arch/riscv/kernel/asm-offsets.c:8:
>> include/linux/mm.h:1092:19: error: static declaration of 'is_vmalloc_or_module_addr' follows non-static declaration
1092 | static inline int is_vmalloc_or_module_addr(const void *x)
| ^~~~~~~~~~~~~~~~~~~~~~~~~
In file included from arch/riscv/include/asm/runtime-const.h:7,
from include/linux/fs.h:53,
from include/linux/huge_mm.h:7,
from include/linux/mm.h:1016,
from arch/riscv/kernel/asm-offsets.c:8:
arch/riscv/include/asm/cacheflush.h:49:13: note: previous implicit declaration of 'is_vmalloc_or_module_addr' with type 'int()'
49 | if (is_vmalloc_or_module_addr((void *)start)) {
| ^~~~~~~~~~~~~~~~~~~~~~~~~
cc1: some warnings being treated as errors
make[3]: *** [scripts/Makefile.build:182: arch/riscv/kernel/asm-offsets.s] Error 1
make[3]: Target 'prepare' not remade because of errors.
make[2]: *** [Makefile:1282: prepare0] Error 2
make[2]: Target 'prepare' not remade because of errors.
make[1]: *** [Makefile:248: __sub-make] Error 2
make[1]: Target 'prepare' not remade because of errors.
make: *** [Makefile:248: __sub-make] Error 2
make: Target 'prepare' not remade because of errors.
vim +/is_vmalloc_or_module_addr +1092 include/linux/mm.h
98b1917cdef92c David Hildenbrand 2025-04-10 1015
71e3aac0724ffe Andrea Arcangeli 2011-01-13 @1016 #include <linux/huge_mm.h>
^1da177e4c3f41 Linus Torvalds 2005-04-16 1017
^1da177e4c3f41 Linus Torvalds 2005-04-16 1018 /*
^1da177e4c3f41 Linus Torvalds 2005-04-16 1019 * Methods to modify the page usage count.
^1da177e4c3f41 Linus Torvalds 2005-04-16 1020 *
^1da177e4c3f41 Linus Torvalds 2005-04-16 1021 * What counts for a page usage:
^1da177e4c3f41 Linus Torvalds 2005-04-16 1022 * - cache mapping (page->mapping)
^1da177e4c3f41 Linus Torvalds 2005-04-16 1023 * - private data (page->private)
^1da177e4c3f41 Linus Torvalds 2005-04-16 1024 * - page mapped in a task's page tables, each mapping
^1da177e4c3f41 Linus Torvalds 2005-04-16 1025 * is counted separately
^1da177e4c3f41 Linus Torvalds 2005-04-16 1026 *
^1da177e4c3f41 Linus Torvalds 2005-04-16 1027 * Also, many kernel routines increase the page count before a critical
^1da177e4c3f41 Linus Torvalds 2005-04-16 1028 * routine so they can be sure the page doesn't go away from under them.
^1da177e4c3f41 Linus Torvalds 2005-04-16 1029 */
^1da177e4c3f41 Linus Torvalds 2005-04-16 1030
^1da177e4c3f41 Linus Torvalds 2005-04-16 1031 /*
da6052f7b33abe Nicholas Piggin 2006-09-25 1032 * Drop a ref, return true if the refcount fell to zero (the page has no users)
^1da177e4c3f41 Linus Torvalds 2005-04-16 1033 */
7c8ee9a86340db Nicholas Piggin 2006-03-22 1034 static inline int put_page_testzero(struct page *page)
7c8ee9a86340db Nicholas Piggin 2006-03-22 1035 {
fe896d1878949e Joonsoo Kim 2016-03-17 1036 VM_BUG_ON_PAGE(page_ref_count(page) == 0, page);
fe896d1878949e Joonsoo Kim 2016-03-17 1037 return page_ref_dec_and_test(page);
7c8ee9a86340db Nicholas Piggin 2006-03-22 1038 }
^1da177e4c3f41 Linus Torvalds 2005-04-16 1039
b620f63358cd35 Matthew Wilcox (Oracle 2020-12-06 1040) static inline int folio_put_testzero(struct folio *folio)
b620f63358cd35 Matthew Wilcox (Oracle 2020-12-06 1041) {
b620f63358cd35 Matthew Wilcox (Oracle 2020-12-06 1042) return put_page_testzero(&folio->page);
b620f63358cd35 Matthew Wilcox (Oracle 2020-12-06 1043) }
b620f63358cd35 Matthew Wilcox (Oracle 2020-12-06 1044)
^1da177e4c3f41 Linus Torvalds 2005-04-16 1045 /*
7c8ee9a86340db Nicholas Piggin 2006-03-22 1046 * Try to grab a ref unless the page has a refcount of zero, return false if
7c8ee9a86340db Nicholas Piggin 2006-03-22 1047 * that is the case.
8e0861fa3c4edf Alexey Kardashevskiy 2013-08-28 1048 * This can be called when MMU is off so it must not access
8e0861fa3c4edf Alexey Kardashevskiy 2013-08-28 1049 * any of the virtual mappings.
^1da177e4c3f41 Linus Torvalds 2005-04-16 1050 */
c25303281d7929 Matthew Wilcox (Oracle 2021-06-05 1051) static inline bool get_page_unless_zero(struct page *page)
7c8ee9a86340db Nicholas Piggin 2006-03-22 1052 {
fe896d1878949e Joonsoo Kim 2016-03-17 1053 return page_ref_add_unless(page, 1, 0);
7c8ee9a86340db Nicholas Piggin 2006-03-22 1054 }
^1da177e4c3f41 Linus Torvalds 2005-04-16 1055
3c1ea2c729ef8e Vishal Moola (Oracle 2023-01-30 1056) static inline struct folio *folio_get_nontail_page(struct page *page)
3c1ea2c729ef8e Vishal Moola (Oracle 2023-01-30 1057) {
3c1ea2c729ef8e Vishal Moola (Oracle 2023-01-30 1058) if (unlikely(!get_page_unless_zero(page)))
3c1ea2c729ef8e Vishal Moola (Oracle 2023-01-30 1059) return NULL;
3c1ea2c729ef8e Vishal Moola (Oracle 2023-01-30 1060) return (struct folio *)page;
3c1ea2c729ef8e Vishal Moola (Oracle 2023-01-30 1061) }
3c1ea2c729ef8e Vishal Moola (Oracle 2023-01-30 1062)
53df8fdc15fb64 Wu Fengguang 2010-01-27 1063 extern int page_is_ram(unsigned long pfn);
124fe20d94630b Dan Williams 2015-08-10 1064
124fe20d94630b Dan Williams 2015-08-10 1065 enum {
124fe20d94630b Dan Williams 2015-08-10 1066 REGION_INTERSECTS,
124fe20d94630b Dan Williams 2015-08-10 1067 REGION_DISJOINT,
124fe20d94630b Dan Williams 2015-08-10 1068 REGION_MIXED,
124fe20d94630b Dan Williams 2015-08-10 1069 };
124fe20d94630b Dan Williams 2015-08-10 1070
1c29f25bf5d6c5 Toshi Kani 2016-01-26 1071 int region_intersects(resource_size_t offset, size_t size, unsigned long flags,
1c29f25bf5d6c5 Toshi Kani 2016-01-26 1072 unsigned long desc);
53df8fdc15fb64 Wu Fengguang 2010-01-27 1073
48667e7a43c1a1 Christoph Lameter 2008-02-04 1074 /* Support for virtually mapped pages */
b3bdda02aa547a Christoph Lameter 2008-02-04 1075 struct page *vmalloc_to_page(const void *addr);
b3bdda02aa547a Christoph Lameter 2008-02-04 1076 unsigned long vmalloc_to_pfn(const void *addr);
48667e7a43c1a1 Christoph Lameter 2008-02-04 1077
0738c4bb8f2a8b Paul Mundt 2008-03-12 1078 /*
0738c4bb8f2a8b Paul Mundt 2008-03-12 1079 * Determine if an address is within the vmalloc range
0738c4bb8f2a8b Paul Mundt 2008-03-12 1080 *
0738c4bb8f2a8b Paul Mundt 2008-03-12 1081 * On nommu, vmalloc/vfree wrap through kmalloc/kfree directly, so there
0738c4bb8f2a8b Paul Mundt 2008-03-12 1082 * is no special casing required.
0738c4bb8f2a8b Paul Mundt 2008-03-12 1083 */
81ac3ad9061dd9 KAMEZAWA Hiroyuki 2009-09-22 1084 #ifdef CONFIG_MMU
186525bd6b83ef Ingo Molnar 2019-11-29 1085 extern bool is_vmalloc_addr(const void *x);
81ac3ad9061dd9 KAMEZAWA Hiroyuki 2009-09-22 1086 extern int is_vmalloc_or_module_addr(const void *x);
81ac3ad9061dd9 KAMEZAWA Hiroyuki 2009-09-22 1087 #else
186525bd6b83ef Ingo Molnar 2019-11-29 1088 static inline bool is_vmalloc_addr(const void *x)
186525bd6b83ef Ingo Molnar 2019-11-29 1089 {
186525bd6b83ef Ingo Molnar 2019-11-29 1090 return false;
186525bd6b83ef Ingo Molnar 2019-11-29 1091 }
934831d060ccd5 David Howells 2009-09-24 @1092 static inline int is_vmalloc_or_module_addr(const void *x)
81ac3ad9061dd9 KAMEZAWA Hiroyuki 2009-09-22 1093 {
81ac3ad9061dd9 KAMEZAWA Hiroyuki 2009-09-22 1094 return 0;
81ac3ad9061dd9 KAMEZAWA Hiroyuki 2009-09-22 1095 }
81ac3ad9061dd9 KAMEZAWA Hiroyuki 2009-09-22 1096 #endif
9e2779fa281cfd Christoph Lameter 2008-02-04 1097
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