Date: Fri, 15 Jun 2007 02:55:22 -0700 (PDT)
Message-Id: <20070615.025522.36921451.davem@davemloft.net>
To: arnd@arndb.de
Cc: benh@kernel.crashing.org, dwmw2@infradead.org,
       linux-kernel@vger.kernel.org, airlied@linux.ie,
       linux-arch@vger.kernel.org, akpm@linux-foundation.org
Subject: Re: [PATCH] Introduce compat_u64 and compat_s64 types
From: David Miller <davem@davemloft.net>
In-Reply-To: <200706151131.38429.arnd@arndb.de>
References: <1181897905.26853.66.camel@localhost.localdomain>
	<200706151128.39566.arnd@arndb.de>
	<200706151131.38429.arnd@arndb.de>
Mime-Version: 1.0
Content-Type: Text/Plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
Sender: linux-kernel-owner@vger.kernel.org
Content-Length: 1001
Lines: 23

From: Arnd Bergmann <arnd@arndb.de>
Date: Fri, 15 Jun 2007 11:31:37 +0200

> One common problem with 32 bit system call and ioctl emulation
> is the different alignment rules between i386 and 64 bit machines.
> A number of drivers work around this by marking the compat
> structures as 'attribute((packed))', which is not the right
> solution because it breaks all the non-x86 architectures that
> want to use the same compat code.
> 
> Hopefully, this patch improves the situation, it introduces two
> new types, compat_u64 and compat_s64. These are defined on all
> architectures to have the same size and alignment as the 32 bit
> version of u64 and s64.
> 
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>

Acked-by: David S. Miller <davem@davemloft.net>
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/