linux-kernel - Re: [RFC][v7][PATCH 8/9]: Define clone2() syscall

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Message-Id: <200909301815.45211.arnd@arndb.de>
Date:	Wed, 30 Sep 2009 18:15:44 +0200
From:	Arnd Bergmann <arnd@...db.de>
To:	"H. Peter Anvin" <hpa@...or.com>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Arjan van de Ven <arjan@...radead.org>,
	Roland McGrath <roland@...hat.com>,
	Sukadev Bhattiprolu <sukadev@...ux.vnet.ibm.com>,
	Containers <containers@...ts.linux-foundation.org>,
	Nathan Lynch <nathanl@...tin.ibm.com>,
	linux-kernel@...r.kernel.org,
	"Eric W. Biederman" <ebiederm@...ssion.com>, mingo@...e.hu,
	Alexey Dobriyan <adobriyan@...il.com>,
	Pavel Emelyanov <xemul@...nvz.org>, linux-api@...r.kernel.org,
	kosaki.motohiro@...fujitsu.com
Subject: Re: [RFC][v7][PATCH 8/9]: Define clone2() syscall

On Wednesday 30 September 2009, H. Peter Anvin wrote:
> Let's just make it another system call.  It doesn't have any downside
> that I can see, might prevent problems, and avoids setting a bad
> precedent that someone can misinterpret.

One more argument for this is that the new code is architecture independent
using user_stack_pointer(), while the original sys_clone is highly
architecture specific, which is a source for bugs when trying to
extend it.

	Arnd <><
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