linux-kernel - Re: [PATCH 8/9] arm64: vdso32: Provide clock_getres

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <aVwlLmvwXDFs--S7@willie-the-truck>
Date: Mon, 5 Jan 2026 20:55:10 +0000
From: Will Deacon <will@...nel.org>
To: Thomas Weißschuh <thomas.weissschuh@...utronix.de>
Cc: Andy Lutomirski <luto@...nel.org>, Thomas Gleixner <tglx@...utronix.de>,
	Vincenzo Frascino <vincenzo.frascino@....com>,
	Shuah Khan <shuah@...nel.org>, Ingo Molnar <mingo@...hat.com>,
	Borislav Petkov <bp@...en8.de>,
	Dave Hansen <dave.hansen@...ux.intel.com>, x86@...nel.org,
	"H. Peter Anvin" <hpa@...or.com>,
	Russell King <linux@...linux.org.uk>,
	Catalin Marinas <catalin.marinas@....com>,
	Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
	linux-kernel@...r.kernel.org, linux-kselftest@...r.kernel.org,
	Russell King <rmk+kernel@...linux.org.uk>,
	linux-arm-kernel@...ts.infradead.org, linux-mips@...r.kernel.org,
	Arnd Bergmann <arnd@...db.de>, linux-api@...r.kernel.org
Subject: Re: [PATCH 8/9] arm64: vdso32: Provide clock_getres_time64()

On Tue, Dec 23, 2025 at 07:59:19AM +0100, Thomas Weißschuh wrote:
> For consistency with __vdso_clock_gettime64() there should also be a
> 64-bit variant of clock_getres(). This will allow the extension of
> CONFIG_COMPAT_32BIT_TIME to the vDSO and finally the removal of 32-bit
> time types from the kernel and UAPI.
> 
> Signed-off-by: Thomas Weißschuh <thomas.weissschuh@...utronix.de>
> ---
>  arch/arm64/kernel/vdso32/vdso.lds.S      | 1 +
>  arch/arm64/kernel/vdso32/vgettimeofday.c | 6 ++++++
>  2 files changed, 7 insertions(+)
> 
> diff --git a/arch/arm64/kernel/vdso32/vdso.lds.S b/arch/arm64/kernel/vdso32/vdso.lds.S
> index e02b27487ce8..c374fb0146f3 100644
> --- a/arch/arm64/kernel/vdso32/vdso.lds.S
> +++ b/arch/arm64/kernel/vdso32/vdso.lds.S
> @@ -86,6 +86,7 @@ VERSION
>  		__vdso_gettimeofday;
>  		__vdso_clock_getres;
>  		__vdso_clock_gettime64;
> +		__vdso_clock_getres_time64;
>  	local: *;
>  	};
>  }
> diff --git a/arch/arm64/kernel/vdso32/vgettimeofday.c b/arch/arm64/kernel/vdso32/vgettimeofday.c
> index 29b4d8f61e39..d7b39b0a9668 100644
> --- a/arch/arm64/kernel/vdso32/vgettimeofday.c
> +++ b/arch/arm64/kernel/vdso32/vgettimeofday.c
> @@ -32,6 +32,12 @@ int __vdso_clock_getres(clockid_t clock_id,
>  	return __cvdso_clock_getres_time32(clock_id, res);
>  }
>  
> +int __vdso_clock_getres_time64(clockid_t clock_id,
> +			       struct __kernel_timespec *res)
> +{
> +	return __cvdso_clock_getres(clock_id, res);
> +}
> +
>  /* Avoid unresolved references emitted by GCC */
>  
>  void __aeabi_unwind_cpp_pr0(void)

Acked-by: Will Deacon <will@...nel.org>

Please merge this along with the 32-bit Arm change, as it doesn't make
sense otherwise.

Will