linux-kernel - Re: [PATCH 1/3] lib: Introduce copy_from

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Message-ID: <20201116163523.GA18835@infradead.org>
Date:   Mon, 16 Nov 2020 16:35:23 +0000
From:   Christoph Hellwig <hch@...radead.org>
To:     zengzhaoxiu@....com
Cc:     Arnd Bergmann <arnd@...db.de>, linux-kernel@...r.kernel.org,
        linux-arch@...r.kernel.org, Zhaoxiu Zeng <zhaoxiu.zeng@...il.com>
Subject: Re: [PATCH 1/3] lib: Introduce copy_from_back()

On Tue, Nov 10, 2020 at 03:16:01AM +0800, zengzhaoxiu@....com wrote:
> From: Zhaoxiu Zeng <zhaoxiu.zeng@...il.com>
> 
> Copying the matched bytes from the back output buffer is the
> key code of the LZ decompression algorithm which used by zlib, lzo, etc.
> 
> This patch introduce the optimized copy_from_back function.
> The function will be used by later patches in this series.
> 
> Optimization for a specific architecture will be available in the future.
> 
> Signed-off-by: Zhaoxiu Zeng <zhaoxiu.zeng@...il.com>

Please use mandatory-y in include/asm-generic/Kbuild for the case where
we have a sensible default that only a few architectures want to
override.