linux-kernel - Re: [PATCH] LoongArch: Don't define __ARCH_WANT_NEW

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Message-Id: <72168037-f2e1-4107-bad6-ad2efdc6cbe7@app.fastmail.com>
Date: Tue, 16 Dec 2025 15:03:11 +0800
From: "Jiaxun Yang" <jiaxun.yang@...goat.com>
To: "Xi Ruoyao" <xry111@...111.site>, "Huacai Chen" <chenhuacai@...nel.org>,
 "Xuerui Wang" <kernel@...0n.name>, "Arnd Bergmann" <arnd@...db.de>
Cc: "Mingcong Bai" <jeffbai@...c.io>, loongarch@...ts.linux.dev,
 "open list" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] LoongArch: Don't define __ARCH_WANT_NEW_STAT for LA32



On Mon, 15 Dec 2025, at 11:34 AM, Xi Ruoyao wrote:
> While on LA64 we had added __ARCH_WANT_NEW_STAT back for technological
> aesthetics reason, on LA32 the newstat family suffers Y2038 issue and it
> should not be used at all, as the commit 82b355d161c9 ("y2038: Remove
> newstat family from default syscall set") has already pointed out.
>
> Fixes: 14338e631afd ("LoongArch: Adjust system call for 32BIT/64BIT")
> Signed-off-by: Xi Ruoyao <xry111@...111.site>

That makes sense, we certainly don't want any y2038 syscall.

Reviewed-by: Jiaxun Yang <jiaxun.yang@...goat.com>

Thanks!

> ---
>  arch/loongarch/include/asm/unistd.h | 3 +++
>  1 file changed, 3 insertions(+)
>
> diff --git a/arch/loongarch/include/asm/unistd.h 
> b/arch/loongarch/include/asm/unistd.h
> index e2c0f3d86c7b..4a7e4a6b6627 100644
> --- a/arch/loongarch/include/asm/unistd.h
> +++ b/arch/loongarch/include/asm/unistd.h
> @@ -8,7 +8,10 @@
> 
>  #include <uapi/asm/unistd.h>
> 
> +#if defined(__LP64__) && !defined(__SYSCALL_COMPAT)
>  #define __ARCH_WANT_NEW_STAT
> +#endif
> +
>  #define __ARCH_WANT_SYS_CLONE
> 
>  #define NR_syscalls (__NR_syscalls)
> -- 
> 2.52.0

-- 
- Jiaxun