Re: [PATCH] arm64: Change elfcore for_each_mte_vma() to use VMA iterator

From: kernel test robot
Date: Wed Feb 23 2022 - 08:09:39 EST

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In reply to: kernel test robot: "Re: [PATCH] arm64: Change elfcore for_each_mte_vma() to use VMA iterator"
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Hi Liam,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on arm64/for-next/core]
[also build test ERROR on next-20220222]
[cannot apply to linux/master linus/master v5.17-rc5]
[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]

url: https://github.com/0day-ci/linux/commits/Liam-Howlett/arm64-Change-elfcore-for_each_mte_vma-to-use-VMA-iterator/20220223-104149
base: https://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-next/core
config: arm64-randconfig-p001-20220221 (https://download.01.org/0day-ci/archive/20220223/202202232114.VBMtKcTj-lkp@xxxxxxxxx/config)
compiler: aarch64-linux-gcc (GCC) 11.2.0
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# https://github.com/0day-ci/linux/commit/e416e64fe4e04c43daa48131e564c9f2f64ec333
git remote add linux-review https://github.com/0day-ci/linux
git fetch --no-tags linux-review Liam-Howlett/arm64-Change-elfcore-for_each_mte_vma-to-use-VMA-iterator/20220223-104149
git checkout e416e64fe4e04c43daa48131e564c9f2f64ec333
# save the config file to linux build tree
mkdir build_dir
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=arm64 SHELL=/bin/bash

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@xxxxxxxxx>

All errors (new ones prefixed by >>):

arch/arm64/kernel/elfcore.c: In function 'elf_core_extra_phdrs':
>> arch/arm64/kernel/elfcore.c:68:9: error: implicit declaration of function 'VMA_ITERATOR' [-Werror=implicit-function-declaration]
68 | VMA_ITERATOR(vmi, current->mm, 0);
| ^~~~~~~~~~~~
>> arch/arm64/kernel/elfcore.c:68:22: error: 'vmi' undeclared (first use in this function); did you mean 'vma'?
68 | VMA_ITERATOR(vmi, current->mm, 0);
| ^~~
| vma
arch/arm64/kernel/elfcore.c:68:22: note: each undeclared identifier is reported only once for each function it appears in
>> arch/arm64/kernel/elfcore.c:13:17: error: implicit declaration of function 'for_each_vma'; did you mean 'for_each_cpu'? [-Werror=implicit-function-declaration]
13 | for_each_vma(vmi, vma) \
| ^~~~~~~~~~~~
arch/arm64/kernel/elfcore.c:70:9: note: in expansion of macro 'for_each_mte_vma'
70 | for_each_mte_vma(vmi, vma)
| ^~~~~~~~~~~~~~~~
In file included from include/asm-generic/bug.h:5,
from arch/arm64/include/asm/bug.h:26,
from include/linux/bug.h:5,
from include/linux/mmdebug.h:5,
from include/linux/mm.h:9,
from include/linux/coredump.h:6,
from arch/arm64/kernel/elfcore.c:3:
>> include/linux/compiler.h:56:23: error: expected ';' before 'if'
56 | #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
| ^~
arch/arm64/kernel/elfcore.c:14:25: note: in expansion of macro 'if'
14 | if (vma->vm_flags & VM_MTE)
| ^~
arch/arm64/kernel/elfcore.c:70:9: note: in expansion of macro 'for_each_mte_vma'
70 | for_each_mte_vma(vmi, vma)
| ^~~~~~~~~~~~~~~~
arch/arm64/kernel/elfcore.c: In function 'elf_core_write_extra_phdrs':
arch/arm64/kernel/elfcore.c:79:22: error: 'vmi' undeclared (first use in this function); did you mean 'vma'?
79 | VMA_ITERATOR(vmi, current->mm, 0);
| ^~~
| vma
In file included from include/asm-generic/bug.h:5,
from arch/arm64/include/asm/bug.h:26,
from include/linux/bug.h:5,
from include/linux/mmdebug.h:5,
from include/linux/mm.h:9,
from include/linux/coredump.h:6,
from arch/arm64/kernel/elfcore.c:3:
>> include/linux/compiler.h:56:23: error: expected ';' before 'if'
56 | #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
| ^~
arch/arm64/kernel/elfcore.c:14:25: note: in expansion of macro 'if'
14 | if (vma->vm_flags & VM_MTE)
| ^~
arch/arm64/kernel/elfcore.c:81:9: note: in expansion of macro 'for_each_mte_vma'
81 | for_each_mte_vma(vmi, vma) {
| ^~~~~~~~~~~~~~~~
arch/arm64/kernel/elfcore.c: In function 'elf_core_extra_data_size':
arch/arm64/kernel/elfcore.c:105:22: error: 'vmi' undeclared (first use in this function); did you mean 'vma'?
105 | VMA_ITERATOR(vmi, current->mm, 0);
| ^~~
| vma
In file included from include/asm-generic/bug.h:5,
from arch/arm64/include/asm/bug.h:26,
from include/linux/bug.h:5,
from include/linux/mmdebug.h:5,
from include/linux/mm.h:9,
from include/linux/coredump.h:6,
from arch/arm64/kernel/elfcore.c:3:
>> include/linux/compiler.h:56:23: error: expected ';' before 'if'
56 | #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
| ^~
arch/arm64/kernel/elfcore.c:14:25: note: in expansion of macro 'if'
14 | if (vma->vm_flags & VM_MTE)
| ^~
arch/arm64/kernel/elfcore.c:107:9: note: in expansion of macro 'for_each_mte_vma'
107 | for_each_mte_vma(vmi, vma)
| ^~~~~~~~~~~~~~~~
arch/arm64/kernel/elfcore.c: In function 'elf_core_write_extra_data':
arch/arm64/kernel/elfcore.c:116:22: error: 'vmi' undeclared (first use in this function); did you mean 'vma'?
116 | VMA_ITERATOR(vmi, current->mm, 0);
| ^~~
| vma
In file included from include/asm-generic/bug.h:5,
from arch/arm64/include/asm/bug.h:26,
from include/linux/bug.h:5,
from include/linux/mmdebug.h:5,
from include/linux/mm.h:9,
from include/linux/coredump.h:6,
from arch/arm64/kernel/elfcore.c:3:
>> include/linux/compiler.h:56:23: error: expected ';' before 'if'
56 | #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
| ^~
arch/arm64/kernel/elfcore.c:14:25: note: in expansion of macro 'if'
14 | if (vma->vm_flags & VM_MTE)
| ^~
arch/arm64/kernel/elfcore.c:118:9: note: in expansion of macro 'for_each_mte_vma'
118 | for_each_mte_vma(vmi, vma) {
| ^~~~~~~~~~~~~~~~
arch/arm64/kernel/elfcore.c: In function 'elf_core_write_extra_phdrs':
arch/arm64/kernel/elfcore.c:99:1: error: control reaches end of non-void function [-Werror=return-type]
99 | }
| ^
arch/arm64/kernel/elfcore.c: In function 'elf_core_write_extra_data':
arch/arm64/kernel/elfcore.c:127:1: error: control reaches end of non-void function [-Werror=return-type]
127 | }
| ^
At top level:
arch/arm64/kernel/elfcore.c:25:12: warning: 'mte_dump_tag_range' defined but not used [-Wunused-function]
25 | static int mte_dump_tag_range(struct coredump_params *cprm,
| ^~~~~~~~~~~~~~~~~~
arch/arm64/kernel/elfcore.c:16:22: warning: 'mte_vma_tag_dump_size' defined but not used [-Wunused-function]
16 | static unsigned long mte_vma_tag_dump_size(struct vm_area_struct *vma)
| ^~~~~~~~~~~~~~~~~~~~~
cc1: some warnings being treated as errors

vim +/VMA_ITERATOR +68 arch/arm64/kernel/elfcore.c

10
11 #define for_each_mte_vma(vmi, vma) \
12 if (system_supports_mte()) \
> 13 for_each_vma(vmi, vma) \
14 if (vma->vm_flags & VM_MTE)
15
16 static unsigned long mte_vma_tag_dump_size(struct vm_area_struct *vma)
17 {
18 if (vma->vm_flags & VM_DONTDUMP)
19 return 0;
20
21 return vma_pages(vma) * MTE_PAGE_TAG_STORAGE;
22 }
23
24 /* Derived from dump_user_range(); start/end must be page-aligned */
25 static int mte_dump_tag_range(struct coredump_params *cprm,
26 unsigned long start, unsigned long end)
27 {
28 unsigned long addr;
29
30 for (addr = start; addr < end; addr += PAGE_SIZE) {
31 char tags[MTE_PAGE_TAG_STORAGE];
32 struct page *page = get_dump_page(addr);
33
34 /*
35 * get_dump_page() returns NULL when encountering an empty
36 * page table entry that would otherwise have been filled with
37 * the zero page. Skip the equivalent tag dump which would
38 * have been all zeros.
39 */
40 if (!page) {
41 dump_skip(cprm, MTE_PAGE_TAG_STORAGE);
42 continue;
43 }
44
45 /*
46 * Pages mapped in user space as !pte_access_permitted() (e.g.
47 * PROT_EXEC only) may not have the PG_mte_tagged flag set.
48 */
49 if (!test_bit(PG_mte_tagged, &page->flags)) {
50 put_page(page);
51 dump_skip(cprm, MTE_PAGE_TAG_STORAGE);
52 continue;
53 }
54
55 mte_save_page_tags(page_address(page), tags);
56 put_page(page);
57 if (!dump_emit(cprm, tags, MTE_PAGE_TAG_STORAGE))
58 return 0;
59 }
60
61 return 1;
62 }
63
64 Elf_Half elf_core_extra_phdrs(void)
65 {
66 struct vm_area_struct *vma;
67 int vma_count = 0;
> 68 VMA_ITERATOR(vmi, current->mm, 0);
69
70 for_each_mte_vma(vmi, vma)
71 vma_count++;
72
73 return vma_count;
74 }
75

---
0-DAY CI Kernel Test Service, Intel Corporation
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Next message: Alexandre Ghiti: "Re: [PATCH -fixes v2 4/4] riscv: Fix config KASAN && DEBUG_VIRTUAL"
Previous message: LABBE Corentin: "Re: [PATCH v3] dt-bindings: crypto: convert rockchip-crypto to yaml"
In reply to: kernel test robot: "Re: [PATCH] arm64: Change elfcore for_each_mte_vma() to use VMA iterator"
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