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Date: Sat, 17 Mar 2007 15:30:43 +0100
From: Heiko Carstens <heiko.carstens@de.ibm.com>
Subject: Re: [RFC][PATCH] sys_fallocate() system call
Message-ID: <20070317143043.GA8577@osiris.ibm.com>
References: <20070117094658.GA17390@amitarora.in.ibm.com> <20070225022326.137b4875.akpm@linux-foundation.org> <20070301183445.GA7911@amitarora.in.ibm.com> <20070316143101.GA10152@amitarora.in.ibm.com> <20070316161704.GE8525@osiris.boeblingen.de.ibm.com> <17915.48105.70494.958220@cargo.ozlabs.ibm.com> <20070317110706.GB29931@parisc-linux.org>
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To: Matthew Wilcox <matthew@wil.cx>
Cc: Paul Mackerras <paulus@samba.org>, "Amit K. Arora" <aarora@linux.vnet.ibm.com>, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-ext4@vger.kernel.org, xfs@oss.sgi.com, Andrew Morton <akpm@linux-foundation.org>, suparna@in.ibm.com, cmm@us.ibm.com, alex@clusterfs.com, suzuki@in.ibm.com

On Sat, Mar 17, 2007 at 05:07:06AM -0600, Matthew Wilcox wrote:
> On Sat, Mar 17, 2007 at 08:59:05PM +1100, Paul Mackerras wrote:
> > ... but wouldn't work on 32-bit powerpc. :(  We would end up with a
> > pad argument between fd and offset, giving 7 arguments in all
> > (counting the loff_t's as 2), but we only support 6.
> 
> Ditto mips and parisc.

Can't be. Or: mips supports 7 arguments and parisc doesn't pad.
Otherwise they couldn't have wired up

sys_sync_file_range(int fd, loff_t offset, loff_t nbytes, unsigned int flags)

But from what I read, it's currently not possible for 32-bit powerpc to
wire up the already present sync_file_range system call.