linux-kernel - Re: [PATCH] x86: branchless clear

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Message-ID: <20160822205458.GA2862@p183.telecom.by>
Date:   Mon, 22 Aug 2016 23:54:58 +0300
From:   Alexey Dobriyan <adobriyan@...il.com>
To:     x86@...nel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] x86: branchless clear_page()

On Mon, Aug 22, 2016 at 11:52:29PM +0300, Alexey Dobriyan wrote:
> Apply alternatives at the call site instead of function body.
> Save branch per clean page.
> 
> Bonus: tell gcc to not flush whole shebang of registers,
> just RDI, RAX, RCX.

Rename individual clear_page() functions closer to implementation
details (_c_e suffix sucks).