linux-kernel - Re: [patch v3 2/2] ptrace: Add support for generic PTRACE_GETREGSET/PTRACE

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Date:	Fri, 12 Feb 2010 16:59:55 +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,
	peter.lachner@...el.com
Subject: Re: [patch v3 2/2] ptrace: Add support for generic
	PTRACE_GETREGSET/PTRACE_SETREGSET

On 02/11, Roland McGrath wrote:
>
> > +static int ptrace_regset(struct task_struct *task, int req, unsigned int type,
> > +			 struct iovec *kiov)
> > +{
> > +	const struct user_regset_view *view = task_user_regset_view(task);
> > +	const struct user_regset *regset = find_regset(view, type);
> > +	int regset_no;
> > +
> > +	if (!regset || (kiov->iov_len % regset->size) != 0)
> > +		return -EIO;
>
> My inclination would be to diagnose these more specifically.

Agreed.

Otherwise I think the patch is fine.

Oleg.

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