linux-kernel - Re: [patch v2 2/4] x86, ptrace: regset extensions to support xstate

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Date:	Wed, 10 Feb 2010 11:44:30 +0100
From:	Oleg Nesterov <oleg@...hat.com>
To:	Roland McGrath <roland@...hat.com>
Cc:	Suresh Siddha <suresh.b.siddha@...el.com>,
	"H. Peter Anvin" <hpa@...or.com>, Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>,
	LKML <linux-kernel@...r.kernel.org>, hjl.tools@...il.com
Subject: Re: [patch v2 2/4] x86, ptrace: regset extensions to support xstate

On 02/09, Roland McGrath wrote:
>
> > @@ -204,8 +209,6 @@ int xfpregs_set(struct task_struct *targ
> >  	if (ret)
> >  		return ret;
> >
> > -	set_stopped_child_used_math(target);
> > -
>
> You didn't mention this change in a comment or log entry.
> It looks like it's superfluous after init_fpu.  So this change
> is right, but AFAICT it belongs in an entirely separate patch
> and has nothing to do with xsave support.

I guess Suresh was going to change xstateregs_set() added by this patch,
it also sets USED_MATH after init_fpu().

Oleg.

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