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

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

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).