linux-kernel - Re: drm: fix radeon setparam on 32/64 bit systems.

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Message-Id: <200706151128.39566.arnd@arndb.de>
Date:	Fri, 15 Jun 2007 11:28:39 +0200
From:	Arnd Bergmann <arnd@...db.de>
To:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
Cc:	David Woodhouse <dwmw2@...radead.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Dave Airlie <airlied@...ux.ie>
Subject: Re: drm: fix radeon setparam on 32/64 bit systems.

On Friday 15 June 2007, Benjamin Herrenschmidt wrote:
> 
> > Only on i386. I think you just broke ppc32-on-ppc64.
> 
> Indeed... I'm pretty sure the 64 bits quantity will be naturally aligned
> on ppc32 (and possibly others).
> 

Ok, I'll bite. I've been telling people for ages what the right solution
for this is, but apparently sometimes you need to do it yourself if you
want to have it done well ;-)

Patch follows to introduce compat_u64. Please redefine your data
structure as

typedef struct drm_radeon_setparam32 {
     int param;
     compat_u64 value;
} drm_radeon_setparam32_t;

	Arnd <><
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