linux-kernel - Re: [RFC][PATCH] sys_fallocate() system call

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Message-ID: <20070317143043.GA8577@osiris.ibm.com>
Date:	Sat, 17 Mar 2007 15:30:43 +0100
From:	Heiko Carstens <heiko.carstens@...ibm.com>
To:	Matthew Wilcox <matthew@....cx>
Cc:	Paul Mackerras <paulus@...ba.org>,
	"Amit K. Arora" <aarora@...ux.vnet.ibm.com>,
	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-ext4@...r.kernel.org, xfs@....sgi.com,
	Andrew Morton <akpm@...ux-foundation.org>, suparna@...ibm.com,
	cmm@...ibm.com, alex@...sterfs.com, suzuki@...ibm.com
Subject: Re: [RFC][PATCH] sys_fallocate() system call

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.
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