From: Anton Blanchard <anton@samba.org>
Subject: Re: [RFC] Heads up on sys_fallocate()
Date: Thu, 1 Mar 2007 16:41:37 -0600
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> That new argument might need to come after "fd" - ARM has funny
> requirements on syscall arg padding and layout.

FYI the 32bit ppc ABI does too, from arch/powerpc/kernel/sys_ppc32.c:

/*
 * long long munging:
 * The 32 bit ABI passes long longs in an odd even register pair.
 */

and the first argument in a function call is in r3.

Anton