Re: [PATCH v2] sh: remove CONFIG_VSYSCALL reference from UAPI

[John Paul Adrian Glaubitz]

Hi Thomas,

On Tue, 2026-02-24 at 16:35 +0100, Thomas Weißschuh wrote:
> AT_SYSINFO_EHDR defines the auxvector index representing the vDSO
> entrypoint. Its value or presence does not depend on whether a vDSO
> is actually provided by the kernel.
> 
> The definition of AT_SYSINFO_EHDR was gated between CONFIG_VSYSCALL to
> avoid a default gate VMA to be created. However that default gate VMA
> was removed entirely in commit a6c19dfe3994
> ("arm64,ia64,ppc,s390,sh,tile,um,x86,mm: remove default gate area").
> 
> Remove the now unnecessary conditional.
> 
> Signed-off-by: Thomas Weißschuh <thomas.weissschuh@xxxxxxxxxxxxx>
> ---
> Changes in v2:
> - Rebase on v7.0-rc1
> - Flesh out commit message
> - Link to v1: https://lore.kernel.org/r/20260112-uapi-sh-at-sysinfo-ehdr-v1-1-b01dfe98a66a@xxxxxxxxxxxxx
> ---
>  arch/sh/include/uapi/asm/auxvec.h | 6 +-----
>  1 file changed, 1 insertion(+), 5 deletions(-)
> 
> diff --git a/arch/sh/include/uapi/asm/auxvec.h b/arch/sh/include/uapi/asm/auxvec.h
> index 8eb47ede7193..63fcc39e2c6a 100644
> --- a/arch/sh/include/uapi/asm/auxvec.h
> +++ b/arch/sh/include/uapi/asm/auxvec.h
> @@ -13,14 +13,10 @@
>   */
>  #define AT_FPUCW		18	/* Used FPU control word.  */
>  
> -#if defined(CONFIG_VSYSCALL) || !defined(__KERNEL__)
>  /*
> - * Only define this in the vsyscall case, the entry point to
> - * the vsyscall page gets placed here. The kernel will attempt
> - * to build a gate VMA we don't care about otherwise..
> + * The entry point to the vsyscall page gets placed here.
>   */
>  #define AT_SYSINFO_EHDR		33
> -#endif
>  
>  /*
>   * More complete cache descriptions than AT_[DIU]CACHEBSIZE.  If the
> 
> ---
> base-commit: 6de23f81a5e08be8fbf5e8d7e9febc72a5b5f27f
> change-id: 20260112-uapi-sh-at-sysinfo-ehdr-f26a12ec5940
> 
> Best regards,

Looks good to me. I'll pick it up later this week. There are a number of patches
that have accumulated over the past months since I got too busy to work on sh-linux.

Reviewed-by: John Paul Adrian Glaubitz <glaubitz@xxxxxxxxxxxxxxxxxxx>

Adrian

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