(subset) [PATCH REPOST^2] drm/ttm/tests: Let ttm_bo_test consider different ww_mutex implementation.

[Maxime Ripard]

On Wed, 19 Jun 2024 16:46:30 +0200, Sebastian Andrzej Siewior wrote:
> PREEMPT_RT has a different locking implementation for ww_mutex. The
> base mutex of struct ww_mutex is declared as struct WW_MUTEX_BASE. The
> latter is defined as `mutex' for non-PREEMPT_RT builds and `rt_mutex'
> for PREEMPT_RT builds.
> 
> Using mutex_lock() directly on the base mutex in
> ttm_bo_reserve_deadlock() leads to compile error on PREEMPT_RT.
> 
> [...]

Applied to misc/kernel.git (drm-misc-next).

Thanks!
Maxime