From: David Howells <dhowells@redhat.com>
To: Christoph Hellwig <hch@lst.de>
Cc: dhowells@redhat.com, akpm@linux-foundation.org,
linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org,
linux@arm.linux.org.uk, starvik@axis.com,
jesper.nilsson@axis.com, ysato@users.sourceforge.jp,
takata@linux-m32r.org, geert@linux-m68k.org,
zippel@linux-m68k.org, gerg@uclinux.org, ralf@linux-mips.org,
benh@kernel.crashing.org, schwidefsky@de.ibm.com,
heiko.carstens@de.ibm.com, lethal@linux-sh.org,
davem@davemloft.net, jdike@addtoit.com, tglx@linutronix.de,
mingo@redhat.com, hpa@zytor.com, viro@zeniv.linux.org.uk
Subject: Re: [PATCH 3/3] generic sys_ipc wrapper
Date: Wed, 06 Jan 2010 19:16:12 +0000 [thread overview]
Message-ID: <7501.1262805372@redhat.com> (raw)
In-Reply-To: <20100106172152.GC17163@lst.de>
Christoph Hellwig <hch@lst.de> wrote:
> various architectures have different strategies for the SHMAT version 1 case
> which apparently never gets used - at least on i386 it seems superflous as
> the compat code on x86-64 and ia64 doesn't even bother to implement it.
The SHMAT version 1 case can be dropped for FRV and MN10300 - neither of them
support iBCS.
> frv goes even further and uses unsigned long for all parameters execept for
> "ptr" which is a pointer type everywhere. The change from int to unsigned
> long for "third" and back to "int" for the others on frv should be fine due
> to the in-register calling conventions for syscalls (we already had a
> similar issue with the generic sys_ptrace), but I'd prefer to have the arch
> maintainers looks over this in details.
That should be okay - the registers are all 32-bits, so int, long and pointers
are all the same size.
David
next prev parent reply other threads:[~2010-01-06 19:18 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-01-06 17:21 [PATCH 3/3] generic sys_ipc wrapper Christoph Hellwig
2010-01-06 18:22 ` Al Viro
2010-01-06 19:16 ` David Howells [this message]
2010-01-06 19:52 ` Arnd Bergmann
2010-01-06 19:59 ` Russell King - ARM Linux
2010-01-06 20:48 ` Arnd Bergmann
2010-01-06 22:33 ` Heiko Carstens
2010-01-08 9:50 ` [PATCH v2 " Christoph Hellwig
2010-01-08 10:03 ` [PATCH v3 " Christoph Hellwig
2010-01-08 10:57 ` Arnd Bergmann
2010-01-08 15:34 ` Christoph Hellwig
2010-01-08 15:49 ` Arnd Bergmann
2010-01-10 4:51 ` Al Viro
2010-01-14 15:25 ` David Howells
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