Subject: Re: [PATCH] prototypes for *at functions & typo fix
From: Nicholas Miell <nmiell@comcast.net>
To: Ulrich Drepper <drepper@redhat.com>
Cc: Andrew Morton <akpm@osdl.org>, linux-kernel@vger.kernel.org
In-Reply-To: <43CF2CA3.5020001@redhat.com>
References: <200601190429.k0J4TWXD018136@devserv.devel.redhat.com>
	 <20060118203733.5aac5ee4.akpm@osdl.org> <1137646586.2842.6.camel@entropy>
	 <43CF2CA3.5020001@redhat.com>
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Date: Wed, 18 Jan 2006 22:37:41 -0800
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On Wed, 2006-01-18 at 22:07 -0800, Ulrich Drepper wrote:
> Nicholas Miell wrote:
> > AMD64 renumbered all the syscalls for optimal cacheline usage or
> > something stupid like that. I suppose the x86 emulation on AMD64 kernels
> > could share the i386 table, but then _NR_foo will have a different value
> > depending on context, and that'll just get confusing.
> 
> Yes, the syscall numbers are quite different, especially because x86 has
> all syscalls, even the obsolete ones.
> 
> But what I mean is that the __NR_ia32_* macros in
> asm-x86-64/ia32_unistd.h aren't used anywhere in the kernel.  And in
> userland the asm-x86/unistd.h file is used when compiling x86 apps.  At
> least this is how the kernel headers for userlevel use should be set up.

Ah, that makes sense. Actually, a few of them are used (sigreturn,
rt_sigreturn, and restart_syscall), but I suppose those could be defined
locally.

-- 
Nicholas Miell <nmiell@comcast.net>

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