linux-kernel - Re: [PATCH 01/16] x86, fpu: wrap get_xsave

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Date:	Wed, 22 Apr 2015 17:17:08 +0200 (CEST)
From:	Thomas Gleixner <tglx@...utronix.de>
To:	Dave Hansen <dave@...1.net>
cc:	Borislav Petkov <bp@...en8.de>, Oleg Nesterov <oleg@...hat.com>,
	linux-kernel@...r.kernel.org, x86@...nel.org,
	dave.hansen@...ux.intel.com, riel@...hat.com, sbsiddha@...il.com,
	luto@...capital.net, mingo@...hat.com, hpa@...or.com,
	fenghua.yu@...el.com
Subject: Re: [PATCH 01/16] x86, fpu: wrap get_xsave_addr() to make it safer

On Wed, 22 Apr 2015, Dave Hansen wrote:
> On 04/22/2015 06:31 AM, Borislav Petkov wrote:
> > I read tsk_get_xsave_field(@tsk, ) as give me the xsave field of @tsk
> > but doing used_math() we're querying current and I'm not sure
> > 
> > 	tsk == current
> > 
> > in all the call sites of tsk_get_xsave_field().
> 
> There aren't that many call sites. :)
> 
> But, yeah, tsk==current for all of them at the moment.

Is there a reason to have the task argument at all if thats only
intended for current?

Thanks,

	tglx



 
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