On 01/30/21 at 03:10pm, Chen Zhou wrote:
> Move macro vmcore_elf_check_arch_cross from arch/x86/include/asm/kexec.h
> to arch/x86/include/asm/elf.h to fix the following compiling warning:
>
> make ARCH=i386
> In file included from arch/x86/kernel/setup.c:39:0:
> ./arch/x86/include/asm/kexec.h:77:0: warning: "vmcore_elf_check_arch_cross" redefined
> # define vmcore_elf_check_arch_cross(x) ((x)->e_machine == EM_X86_64)
>
> In file included from arch/x86/kernel/setup.c:9:0:
> ./include/linux/crash_dump.h:39:0: note: this is the location of the previous definition
> #define vmcore_elf_check_arch_cross(x) 0
>
> The root cause is that vmcore_elf_check_arch_cross under CONFIG_CRASH_CORE
> depend on CONFIG_KEXEC_CORE. Commit 2db65f1db17d ("x86: kdump: move
> reserve_crashkernel[_low]() into crash_core.c") triggered the issue.
>
> Suggested by Mike, simply move vmcore_elf_check_arch_cross from
> arch/x86/include/asm/kexec.h to arch/x86/include/asm/elf.h to fix
> the warning.
>
> Fixes: 2db65f1db17d ("x86: kdump: move reserve_crashkernel[_low]() into crash_core.c")
Where does this commit id '2db65f1db17d' come from? Here you are fixing
another pathc in the same patchset. Please merge this with patch 05/11.
> Reported-by: kernel test robot <lkp@xxxxxxxxx>
> Suggested-by: Mike Rapoport <rppt@xxxxxxxxxx>
> Signed-off-by: Chen Zhou <chenzhou10@xxxxxxxxxx>
> ---
> arch/x86/include/asm/elf.h | 3 +++
> arch/x86/include/asm/kexec.h | 3 ---
> 2 files changed, 3 insertions(+), 3 deletions(-)
>
> diff --git a/arch/x86/include/asm/elf.h b/arch/x86/include/asm/elf.h
> index 66bdfe838d61..5333777cc758 100644
> --- a/arch/x86/include/asm/elf.h
> +++ b/arch/x86/include/asm/elf.h
> @@ -94,6 +94,9 @@ extern unsigned int vdso32_enabled;
>
> #define elf_check_arch(x) elf_check_arch_ia32(x)
>
> +/* We can also handle crash dumps from 64 bit kernel. */
> +# define vmcore_elf_check_arch_cross(x) ((x)->e_machine == EM_X86_64)
> +
> /* SVR4/i386 ABI (pages 3-31, 3-32) says that when the program starts %edx
> contains a pointer to a function which might be registered using `atexit'.
> This provides a mean for the dynamic linker to call DT_FINI functions for
> diff --git a/arch/x86/include/asm/kexec.h b/arch/x86/include/asm/kexec.h
> index 2b18f918203e..6fcae01a9cca 100644
> --- a/arch/x86/include/asm/kexec.h
> +++ b/arch/x86/include/asm/kexec.h
> @@ -72,9 +72,6 @@ struct kimage;
>
> /* The native architecture */
> # define KEXEC_ARCH KEXEC_ARCH_386
> -
> -/* We can also handle crash dumps from 64 bit kernel. */
> -# define vmcore_elf_check_arch_cross(x) ((x)->e_machine == EM_X86_64)
> #else
> /* Maximum physical address we can use pages from */
> # define KEXEC_SOURCE_MEMORY_LIMIT (MAXMEM-1)
> --
> 2.20.1
>
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