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From: Maxime Ripard <mripard@kernel.org>
To: dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, 
 Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: Amaranath Somalapuram <Amaranath.Somalapuram@amd.com>, 
 Andi Shyti <andi.shyti@linux.intel.com>, 
 Andrew Morton <akpm@linux-foundation.org>, 
 Boqun Feng <boqun.feng@gmail.com>, 
 Christian Koenig <christian.koenig@amd.com>, 
 Daniel Vetter <daniel@ffwll.ch>, David Airlie <airlied@gmail.com>, 
 Greg Kroah-Hartman <gregkh@linuxfoundation.org>, 
 Huang Rui <ray.huang@amd.com>, Ingo Molnar <mingo@redhat.com>, 
 Karolina Stolarek <karolina.stolarek@intel.com>, 
 Maarten Lankhorst <maarten.lankhorst@linux.intel.com>, 
 Peter Zijlstra <peterz@infradead.org>, Thomas Gleixner <tglx@linutronix.de>, 
 Thomas Zimmermann <tzimmermann@suse.de>, Waiman Long <longman@redhat.com>, 
 Will Deacon <will@kernel.org>
In-Reply-To: <20240619144630.4DliKOmr@linutronix.de>
References: <20240619144630.4DliKOmr@linutronix.de>
Subject: Re: (subset) [PATCH REPOST^2] drm/ttm/tests: Let ttm_bo_test
 consider different ww_mutex implementation.
Message-Id: <171887359115.3857922.3484081720728678081.b4-ty@kernel.org>
Date: Thu, 20 Jun 2024 10:53:11 +0200
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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