Re: [PATCH 3/6] x86/cpu: proc - remove "wp" status line in cpuinfo

From: Mathias Krause
Date: Tue Feb 14 2017 - 11:47:20 EST

On 14 February 2017 at 17:20, Borislav Petkov <bp@xxxxxxxxx> wrote:
> On Sun, Feb 12, 2017 at 10:12:09PM +0100, Mathias Krause wrote:
>> As of commit a5c2a893dbd4 ("x86, 386 removal: Remove
>> CONFIG_X86_WP_WORKS_OK") the kernel won't boot if CR0.WP isn't working
>> correctly. This makes a process reading this file always see "wp : yes"
>> here -- otherwise there would be no process to begin with ;)
>> As this status line in /proc/cpuinfo serves no purpose for quite some
>> time now, get rid of it.
> Right, sure, except /proc/cpuinfo's format is kind of an ABI and scripts
> rely on it, I'm being told.

That's the reason I haven't folded this change into patch 2. I had
similar doubts but it's not documented in Documentation/ and kinda
useless to test anyway -- what would a "wp : no" tell one?

> TBH, I'd remove that wp:-line too but this
> is just me. tip guys' call.
> FWIW, for all three:
> Acked-by: Borislav Petkov <bp@xxxxxxx>