Re: [LKP] [PATCH] drm/radeon: Try to init amdkfd only if 64 bit kernel

[Andi Kleen <ak@linux.intel.com>]

On Mon, Dec 22, 2014 at 10:49:40AM -0800, Andi Kleen wrote:
> On Mon, Dec 22, 2014 at 11:58:43AM -0500, Alex Deucher wrote:
> > On Mon, Dec 22, 2014 at 6:11 AM, Oded Gabbay <oded.gabbay@amd.com> wrote:
> > > amdkfd driver can be compiled only in 64-bit kernel. Therefore, there is no
> > > point in trying to initialize amdkfd in 32-bit kernel.
> > >
> > > In addition, in case of specific configuration of 32-bit kernel, no modules and
> > > random kernel base, the symbol_request function doesn't work as expected - It
> > > doesn't return NULL if the symbol doesn't exists. That makes the kernel panic.
> > > Therefore, the as amdkfd doesn't compile in 32-bit kernel, the best way is just
> > > to return false immediately.
> > >
> > > Signed-off-by: Oded Gabbay <oded.gabbay@amd.com>
> > 
> > Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
> 
> Sorry but the patch is just bogus. X-bit only code is usually
> a very bad sign for the code. This is not windows programing after all.
> 
> Even if you wanted to do a 64bit only driver -- which
> you probably don't -- the standard way would be to exclude
> it in Kconfig.
> 
> Please root-cause why symbol_request doesn't work on 32bit
> and fix it properly.
> 
> +rusty.

And also with correct email.

-Andi