linux-kernel - Re: [PATCH 12/40] x86, compat: convert ia32 layer to use

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Message-ID: <20100623114116.GE5242@nowhere>
Date:	Wed, 23 Jun 2010 13:41:17 +0200
From:	Frederic Weisbecker <fweisbec@...il.com>
To:	Christoph Hellwig <hch@....de>
Cc:	Ian Munsie <imunsie@....ibm.com>, linux-kernel@...r.kernel.org,
	linuxppc-dev@...abs.org, x86@...nel.org,
	Jason Baron <jbaron@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>, Greg Ungerer <gerg@...inux.org>,
	Steven Rostedt <rostedt@...dmis.org>,
	Ingo Molnar <mingo@...hat.com>,
	Paul Mackerras <paulus@...ba.org>,
	Russell King <rmk+kernel@....linux.org.uk>,
	Thomas Gleixner <tglx@...utronix.de>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH 12/40] x86, compat: convert ia32 layer to use

On Wed, Jun 23, 2010 at 12:46:04PM +0200, Christoph Hellwig wrote:
> On Wed, Jun 23, 2010 at 12:36:21PM +0200, Frederic Weisbecker wrote:
> > I think we wanted that to keep the sys32_ prefixed based naming, to avoid
> > collisions with generic compat handler names.
> 
> For native syscalls we do this by adding a arch prefix inside the
> syscall name, e.g.:
> 
> arch/s390/kernel/sys_s390.c:SYSCALL_DEFINE(s390_fallocate)(int fd, int mode, loff_t offset,
> arch/sparc/kernel/sys_sparc_64.c:SYSCALL_DEFINE1(sparc_pipe_real, struct pt_regs *, regs)


In fact we sort of wanted to standardize the name of arch overriden compat
syscalls, so that userspace programs playing with syscalls tracing won't have
to deal with arch naming differences.

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