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locking/rtmutex: Extend the rtmutex core to support ww_mutex

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Add a ww acquire context pointer to the waiter and various functions and
add the ww_mutex related invocations to the proper spots in the locking
code, similar to the mutex based variant.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/20210815211304.966139174@linutronix.de
This commit is contained in:
Peter Zijlstra
2021-08-15 23:28:58 +02:00
committed by Ingo Molnar
parent 2408f7a378
commit add461325e
4 changed files with 114 additions and 13 deletions
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kernel/locking/rwsem.c
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@@ -1360,7 +1360,7 @@ static inline void __downgrade_write(struct rw_semaphore *sem)
__rt_mutex_lock(rtm, state)
#define rwbase_rtmutex_slowlock_locked(rtm, state) \
__rt_mutex_slowlock_locked(rtm, state)
__rt_mutex_slowlock_locked(rtm, NULL, state)
#define rwbase_rtmutex_unlock(rtm) \
__rt_mutex_unlock(rtm)