On Mon Feb 16, 2026 at 12:19 PM CET, 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.
I just noticed that this patch was sent twice, and I posted my feedback on [1]
-- pasting it here as well.
> Fixes: ba110db8e1bc ("gpu: Move DRM buddy allocator one level up (part two)")
This Fixes: tag seems wrong. How is this code move related to this problem?
This should rather be:
Fixes: 6387a3c4b0c4 ("drm: move the buddy allocator from i915 into common drm")
Also, please add:
Cc: [email protected]
> Cc: Joel Fernandes <[email protected]>
> Cc: Dave Airlie <[email protected]>
> Cc: [email protected]
> Cc: Peter Senna Tschudin <[email protected]>
> Cc: Matthew Auld <[email protected]>
> Signed-off-by: Koen Koning <[email protected]>
[1] https://lore.kernel.org/all/[email protected]/
