From: Matthew Wilcox <matthew@wil.cx>
To: David Woodhouse <dwmw2@infradead.org>
Cc: Andrew Morton <akpm@linux-foundation.org>,
torvalds@linux-foundation.org, paulus@samba.org,
linux-arch@vger.kernel.org, drepper@redhat.com,
rmk@arm.linux.org.uk
Subject: Re: Introduce fixed sys_sync_file_range2() syscall, implement on PowerPC and ARM
Date: Mon, 25 Jun 2007 04:24:13 -0600 [thread overview]
Message-ID: <20070625102412.GE22063@parisc-linux.org> (raw)
In-Reply-To: <1182764890.12109.35.camel@pmac.infradead.org>
On Mon, Jun 25, 2007 at 10:48:10AM +0100, David Woodhouse wrote:
> Seems like a reasonable observation, although 'oddball' isn't really the
> case here. There are a bunch of architectures which align 64-bit
> arguments into even pairs of registers. And a lot of people who forget
> that 64-bit quantities are often aligned to 8 bytes, on non-x86.
> cf. f4d2781731e846c2f01dd85e71883d120860c6dd
[...]
> It might actually be useful to merge all these into fs/compat.c. I think
> the only reason most of them are arch-specific at the moment is because
> we have to deal with endianness when we put the two 32-bit integers
> together into a 64-bit integer. And MIPS copes well enough with that,
> with its merge_64() macro.
PowerPC is new to me -- I had thought that MIPS and PA-RISC were the
only two. Seems like you took the opposite path from parisc -- you've
got glibc to call the functions correctly, rather than what we did which
was fix them up in the kernel.
next prev parent reply other threads:[~2007-06-25 10:24 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-06-25 8:49 Introduce fixed sys_sync_file_range2() syscall, implement on PowerPC and ARM David Woodhouse
2007-06-25 9:11 ` Andrew Morton
2007-06-25 9:48 ` David Woodhouse
2007-06-25 10:24 ` Matthew Wilcox [this message]
2007-06-25 10:35 ` Matthew Wilcox
2007-06-25 11:09 ` Russell King
2007-06-25 11:37 ` David Woodhouse
2007-06-25 11:47 ` Matthew Wilcox
2007-06-25 12:01 ` David Woodhouse
2007-06-25 12:04 ` Segher Boessenkool
2007-06-25 12:34 ` David Woodhouse
2007-06-25 13:10 ` Segher Boessenkool
2007-06-25 13:33 ` David Woodhouse
2007-06-27 13:34 ` Ralf Baechle
2007-06-27 12:23 ` Geert Uytterhoeven
2007-06-25 11:33 ` David Howells
2007-06-25 14:35 ` Kyle McMartin
2007-06-27 13:22 ` Ralf Baechle
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