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Message-ID: <212db8ca-c01c-4cb0-b794-50931338afb9@roeck-us.net>
Date: Thu, 22 Feb 2024 08:04:16 -0800
From: Guenter Roeck <linux@...ck-us.net>
To: Charlie Jenkins <charlie@...osinc.com>
Cc: "James E.J. Bottomley" <James.Bottomley@...senpartnership.com>,
Helge Deller <deller@....de>, Arnd Bergmann <arnd@...db.de>,
Andrew Morton <akpm@...ux-foundation.org>,
linux-parisc@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-arch@...r.kernel.org
Subject: Re: [PATCH 1/4] asm-generic headers: Allow csum_partial arch override
On Wed, Feb 21, 2024 at 06:37:11PM -0800, Charlie Jenkins wrote:
> Arches can have more a efficient implementation of csum_partial.
>
> Signed-off-by: Charlie Jenkins <charlie@...osinc.com>
Tested-by: Guenter Roeck <linux@...ck-us.net>
> ---
> include/asm-generic/checksum.h | 2 ++
> lib/checksum.c | 2 ++
> 2 files changed, 4 insertions(+)
>
> diff --git a/include/asm-generic/checksum.h b/include/asm-generic/checksum.h
> index ad928cce268b..3309830ba2cb 100644
> --- a/include/asm-generic/checksum.h
> +++ b/include/asm-generic/checksum.h
> @@ -4,6 +4,7 @@
>
> #include <linux/bitops.h>
>
> +#ifndef csum_partial
> /*
> * computes the checksum of a memory block at buff, length len,
> * and adds in "sum" (32-bit)
> @@ -17,6 +18,7 @@
> * it's best to have buff aligned on a 32-bit boundary
> */
> extern __wsum csum_partial(const void *buff, int len, __wsum sum);
> +#endif
>
> #ifndef ip_fast_csum
> /*
> diff --git a/lib/checksum.c b/lib/checksum.c
> index 6860d6b05a17..c115a9ac71d9 100644
> --- a/lib/checksum.c
> +++ b/lib/checksum.c
> @@ -110,6 +110,7 @@ __sum16 ip_fast_csum(const void *iph, unsigned int ihl)
> EXPORT_SYMBOL(ip_fast_csum);
> #endif
>
> +#ifndef csum_partial
> /*
> * computes the checksum of a memory block at buff, length len,
> * and adds in "sum" (32-bit)
> @@ -134,6 +135,7 @@ __wsum csum_partial(const void *buff, int len, __wsum wsum)
> return (__force __wsum)result;
> }
> EXPORT_SYMBOL(csum_partial);
> +#endif
>
> /*
> * this routine is used for miscellaneous IP-like checksums, mainly
>
> --
> 2.34.1
>
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