linux-kernel - Ping: [PATCH] LoongArch: Slightly clean up drdtime

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Message-ID: <369bce8101f2db6685c0e2446976eb7ea16510eb.camel@xry111.site>
Date:   Tue, 05 Dec 2023 16:01:11 +0800
From:   Xi Ruoyao <xry111@...111.site>
To:     Huacai Chen <chenhuacai@...nel.org>,
        WANG Xuerui <kernel@...0n.name>
Cc:     loongarch@...ts.linux.dev, linux-kernel@...r.kernel.org
Subject: Ping: [PATCH] LoongArch: Slightly clean up drdtime

Ping.

On Sun, 2023-11-26 at 20:17 +0800, Xi Ruoyao wrote:
> As we are just discarding the stable clock ID, simply write it into
> $zero instead of allocating a temporary register.
> 
> Signed-off-by: Xi Ruoyao <xry111@...111.site>
> ---
>  arch/loongarch/include/asm/loongarch.h | 5 ++---
>  1 file changed, 2 insertions(+), 3 deletions(-)
> 
> diff --git a/arch/loongarch/include/asm/loongarch.h b/arch/loongarch/include/asm/loongarch.h
> index 9b4957cefa8a..46366e783c84 100644
> --- a/arch/loongarch/include/asm/loongarch.h
> +++ b/arch/loongarch/include/asm/loongarch.h
> @@ -1098,12 +1098,11 @@
>  
>  static __always_inline u64 drdtime(void)
>  {
> -	int rID = 0;
>  	u64 val = 0;
>  
>  	__asm__ __volatile__(
> -		"rdtime.d %0, %1 \n\t"
> -		: "=r"(val), "=r"(rID)
> +		"rdtime.d %0, $zero\n\t"
> +		: "=r"(val)
>  		:
>  		);
>  	return val;

-- 
Xi Ruoyao <xry111@...111.site>
School of Aerospace Science and Technology, Xidian University