linux-kernel - Re: [PATCH v6 08/10] x86, mpx: add prctl commands PR_MPX_REGISTER, PR_MPX

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Message-ID: <53A8874A.3050301@mit.edu>
Date:	Mon, 23 Jun 2014 13:00:10 -0700
From:	Andy Lutomirski <luto@...capital.net>
To:	Qiaowei Ren <qiaowei.ren@...el.com>,
	"H. Peter Anvin" <hpa@...or.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	Dave Hansen <dave.hansen@...el.com>
CC:	x86@...nel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v6 08/10] x86, mpx: add prctl commands PR_MPX_REGISTER,
 PR_MPX_UNREGISTER

On 06/18/2014 02:44 AM, Qiaowei Ren wrote:
> This patch adds the PR_MPX_REGISTER and PR_MPX_UNREGISTER prctl()
> commands. These commands can be used to register and unregister MPX
> related resource on the x86 platform.
> 
> The base of the bounds directory is set into mm_struct during
> PR_MPX_REGISTER command execution. This member can be used to
> check whether one application is mpx enabled.

The register and unregister operations seem to be almost the same thing.
 How about just PR_SYNC_MPX?

Also, would this make more sense in arch_prctl?

--Andy
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