Re: [PATCH v2] gpu: Fix uninitialized buddy for built-in drivers

[Joel Fernandes <joelagnelf@nvidia.com>]

On Mon, 16 Feb 2026 12:19:01 +0100, Koen Koning wrote:
> Use subsys_initcall instead of module_init for the GPU buddy allocator,
> so its initialization code runs before any gpu drivers.
> Otherwise, a built-in driver that tries to use the buddy allocator will
> run into a kernel NULL pointer dereference because slab_blocks is
> uninitialized.
> 
> Specifically, this fixes drm/xe (as built-in) running into a kernel
> panic during boot, because it uses buddy during device probe.
> 
> Fixes: ba110db8e1bc ("gpu: Move DRM buddy allocator one level up (part two)")
> Cc: Joel Fernandes <joelagnelf@nvidia.com>
> Cc: Dave Airlie <airlied@redhat.com>
> Cc: intel-xe@lists.freedesktop.org
> Cc: Peter Senna Tschudin <peter.senna@linux.intel.com>
> Cc: Matthew Auld <matthew.auld@intel.com>
> Signed-off-by: Koen Koning <koen.koning@linux.intel.com>
>

Reviewed-by: Joel Fernandes <joelagnelf@nvidia.com>

-- 
Joel Fernandes