1 files changed, 0 insertions, 79 deletions
diff --git a/debian/patches-rt/0002-locking-rtmutex-Avoid-unconditional-slowpath-for-DEB.patch b/debian/patches-rt/0002-locking-rtmutex-Avoid-unconditional-slowpath-for-DEB.patch
deleted file mode 100644
index 561d5891b..000000000
--- a/debian/patches-rt/0002-locking-rtmutex-Avoid-unconditional-slowpath-for-DEB.patch
+++ /dev/null
@@ -1,79 +0,0 @@
-From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
-Date: Fri, 8 Sep 2023 18:22:49 +0200
-Subject: [PATCH 2/7] locking/rtmutex: Avoid unconditional slowpath for
- DEBUG_RT_MUTEXES
-Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/6.6/older/patches-6.6.7-rt18.tar.xz
-
-With DEBUG_RT_MUTEXES enabled the fast-path rt_mutex_cmpxchg_acquire()
-always fails and all lock operations take the slow path.
-
-Provide a new helper inline rt_mutex_try_acquire() which maps to
-rt_mutex_cmpxchg_acquire() in the non-debug case. For the debug case
-it invokes rt_mutex_slowtrylock() which can acquire a non-contended
-rtmutex under full debug coverage.
-
-Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
-Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
-Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
-Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
-Link: https://lkml.kernel.org/r/20230908162254.999499-3-bigeasy@linutronix.de
----
- kernel/locking/rtmutex.c     |   21 ++++++++++++++++++++-
- kernel/locking/ww_rt_mutex.c |    2 +-
- 2 files changed, 21 insertions(+), 2 deletions(-)
-
---- a/kernel/locking/rtmutex.c
-+++ b/kernel/locking/rtmutex.c
-@@ -218,6 +218,11 @@ static __always_inline bool rt_mutex_cmp
- 	return try_cmpxchg_acquire(&lock->owner, &old, new);
- }
- 
-+static __always_inline bool rt_mutex_try_acquire(struct rt_mutex_base *lock)
-+{
-+	return rt_mutex_cmpxchg_acquire(lock, NULL, current);
-+}
-+
- static __always_inline bool rt_mutex_cmpxchg_release(struct rt_mutex_base *lock,
- 						     struct task_struct *old,
- 						     struct task_struct *new)
-@@ -297,6 +302,20 @@ static __always_inline bool rt_mutex_cmp
- 
- }
- 
-+static int __sched rt_mutex_slowtrylock(struct rt_mutex_base *lock);
-+
-+static __always_inline bool rt_mutex_try_acquire(struct rt_mutex_base *lock)
-+{
-+	/*
-+	 * With debug enabled rt_mutex_cmpxchg trylock() will always fail.
-+	 *
-+	 * Avoid unconditionally taking the slow path by using
-+	 * rt_mutex_slow_trylock() which is covered by the debug code and can
-+	 * acquire a non-contended rtmutex.
-+	 */
-+	return rt_mutex_slowtrylock(lock);
-+}
-+
- static __always_inline bool rt_mutex_cmpxchg_release(struct rt_mutex_base *lock,
- 						     struct task_struct *old,
- 						     struct task_struct *new)
-@@ -1755,7 +1774,7 @@ static int __sched rt_mutex_slowlock(str
- static __always_inline int __rt_mutex_lock(struct rt_mutex_base *lock,
- 					   unsigned int state)
- {
--	if (likely(rt_mutex_cmpxchg_acquire(lock, NULL, current)))
-+	if (likely(rt_mutex_try_acquire(lock)))
- 		return 0;
- 
- 	return rt_mutex_slowlock(lock, NULL, state);
---- a/kernel/locking/ww_rt_mutex.c
-+++ b/kernel/locking/ww_rt_mutex.c
-@@ -62,7 +62,7 @@ static int __sched
- 	}
- 	mutex_acquire_nest(&rtm->dep_map, 0, 0, nest_lock, ip);
- 
--	if (likely(rt_mutex_cmpxchg_acquire(&rtm->rtmutex, NULL, current))) {
-+	if (likely(rt_mutex_try_acquire(&rtm->rtmutex))) {
- 		if (ww_ctx)
- 			ww_mutex_set_context_fastpath(lock, ww_ctx);
- 		return 0;