linux-kernel - Re: [PATCH v7 06/10] alpha: Align prototypes of IO memcpy/memset

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Message-ID: <beb7c984-0a10-4fe5-856f-58000edb68e8@linaro.org>
Date: Thu, 3 Oct 2024 07:46:20 -0700
From: Richard Henderson <richard.henderson@...aro.org>
To: Julian Vetter <jvetter@...rayinc.com>, Arnd Bergmann <arnd@...db.de>,
 Russell King <linux@...linux.org.uk>,
 Catalin Marinas <catalin.marinas@....com>, Will Deacon <will@...nel.org>,
 Guo Ren <guoren@...nel.org>, Huacai Chen <chenhuacai@...nel.org>,
 WANG Xuerui <kernel@...0n.name>, Andrew Morton <akpm@...ux-foundation.org>,
 Geert Uytterhoeven <geert@...ux-m68k.org>,
 Ivan Kokshaysky <ink@...assic.park.msu.ru>, Matt Turner
 <mattst88@...il.com>,
 "James E . J . Bottomley" <James.Bottomley@...senpartnership.com>,
 Helge Deller <deller@....de>, Yoshinori Sato <ysato@...rs.sourceforge.jp>,
 Rich Felker <dalias@...c.org>,
 John Paul Adrian Glaubitz <glaubitz@...sik.fu-berlin.de>,
 Richard Weinberger <richard@....at>,
 Anton Ivanov <anton.ivanov@...bridgegreys.com>,
 Johannes Berg <johannes@...solutions.net>
Cc: linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
 linux-csky@...r.kernel.org, loongarch@...ts.linux.dev,
 linux-m68k@...ts.linux-m68k.org, linux-alpha@...r.kernel.org,
 linux-parisc@...r.kernel.org, linux-sh@...r.kernel.org,
 linux-um@...ts.infradead.org, linux-arch@...r.kernel.org,
 Yann Sionneau <ysionneau@...rayinc.com>
Subject: Re: [PATCH v7 06/10] alpha: Align prototypes of IO memcpy/memset

On 9/30/24 06:23, Julian Vetter wrote:
> Align the prototypes of the memcpy_{from,to}io and memset_io functions
> with the new ones from iomap_copy.c and remove function declarations,
> because they are now declared in asm-generic/io.h.
> 
> Reviewed-by: Yann Sionneau <ysionneau@...rayinc.com>
> Signed-off-by: Julian Vetter <jvetter@...rayinc.com>
> ---
> Changes for v7:
> - New patch
> ---
>   arch/alpha/include/asm/io.h | 6 ++----
>   arch/alpha/kernel/io.c      | 4 ++--
>   2 files changed, 4 insertions(+), 6 deletions(-)
> 
> diff --git a/arch/alpha/include/asm/io.h b/arch/alpha/include/asm/io.h
> index b191d87f89c4..db3a9f41447e 100644
> --- a/arch/alpha/include/asm/io.h
> +++ b/arch/alpha/include/asm/io.h
> @@ -591,13 +591,11 @@ extern inline u64 readq_relaxed(const volatile void __iomem *addr)
>   /*
>    * String version of IO memory access ops:
>    */
> -extern void memcpy_fromio(void *, const volatile void __iomem *, long);
> -extern void memcpy_toio(volatile void __iomem *, const void *, long);
>   extern void _memset_c_io(volatile void __iomem *, unsigned long, long);
>   
> -static inline void memset_io(volatile void __iomem *addr, u8 c, long len)
> +static inline void memset_io(volatile void __iomem *dst, int c, size_t count)
>   {
> -	_memset_c_io(addr, 0x0101010101010101UL * c, len);
> +	_memset_c_io(dst, 0x0101010101010101UL * c, count);

By changing c from 'u8' to 'int', you need to mask before the multiplication.

r~