linux-kernel - Re: [PATCH] x86: Reset FPU on exec

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Message-ID: <20150421135127.GB13605@tassilo.jf.intel.com>
Date:	Tue, 21 Apr 2015 06:51:27 -0700
From:	Andi Kleen <ak@...ux.intel.com>
To:	Thomas Gleixner <tglx@...utronix.de>
Cc:	Andi Kleen <andi@...stfloor.org>, x86@...nel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] x86: Reset FPU on exec

On Tue, Apr 21, 2015 at 11:35:58AM +0200, Thomas Gleixner wrote:
> On Fri, 17 Apr 2015, Andi Kleen wrote:
> 
> > +void reset_fpu(void)
> > +{
> > +	drop_init_fpu(current);
> > +}
> 
> So we have a new function which is merily a wrapper around a non
> existent function. 

I originally tried to use the inline function directly, but 
it's defined in "fpu-internal.h" and including it in asm/elf.h
causing all kinds of issues.

> 
> What's the exact purpose of this patch aside of breaking the build?

Try reading the description?

Also it builds fine here.

-Andi
-- 
ak@...ux.intel.com -- Speaking for myself only
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