linux-kernel - RE: [PATCH v8 08/10] x86, mpx: add prctl commands PR_MPX_REGISTER, PR_MPX

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Date:	Thu, 18 Sep 2014 02:37:50 +0000
From:	"Ren, Qiaowei" <qiaowei.ren@...el.com>
To:	Kevin Easton <kevin@...rana.org>
CC:	"H. Peter Anvin" <hpa@...or.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"Hansen, Dave" <dave.hansen@...el.com>,
	"x86@...nel.org" <x86@...nel.org>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH v8 08/10] x86, mpx: add prctl commands PR_MPX_REGISTER,
 PR_MPX_UNREGISTER



On 2014-09-18, Kevin Easton wrote:
> On Thu, Sep 18, 2014 at 12:40:29AM +0000, Ren, Qiaowei wrote:
>>> Would it be prudent to use an error code other than EINVAL for the
>>> "hardware doesn't support it" case?
>>> 
>> Seems like no specific error code for this case.
> 
> ENXIO would probably be OK.  It's not too important as long as it's
> documented.
> 
Yes. Looks like that ENXIO will be better.

Thanks,
Qiaowei
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