linux-kernel - Re: RFD: x32 ABI system call numbers

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Message-ID: <6467.1315144296@turing-police.cc.vt.edu>
Date:	Sun, 04 Sep 2011 09:51:36 -0400
From:	Valdis.Kletnieks@...edu
To:	"H. Peter Anvin" <hpa@...or.com>
Cc:	Arnd Bergmann <arnd@...db.de>, "H.J. Lu" <hjl.tools@...il.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Christoph Hellwig <hch@...radead.org>,
	LKML <linux-kernel@...r.kernel.org>, Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>,
	Richard Kuo <rkuo@...eaurora.org>,
	Mark Salter <msalter@...hat.com>,
	Jonas Bonn <jonas@...thpole.se>,
	Tobias Klauser <tklauser@...tanz.ch>
Subject: Re: RFD: x32 ABI system call numbers

On Sat, 03 Sep 2011 10:27:42 PDT, "H. Peter Anvin" said:

> About ioctl in particular, the ABI has dependencies into almost every 
> single driver in the Linux kernel.  It is hard-coded in the kernel that 
> there are two paths -- native and compat.  Since pointers are going to 
> be 4 bytes, it means we have to use the compat path.

Ah, that's the part I was missing, thanks.

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