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locking/rtmutex: Decrapify __rt_mutex_init()

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The conditional debug handling is just another layer of obfuscation. Split
the function so rt_mutex_init_proxy_locked() can invoke the inner init and
__rt_mutex_init() gets the full treatment.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/20210326153943.955697588@linutronix.de
This commit is contained in:
Thomas Gleixner 2021-03-26 16:29:38 +01:00 • committed by Ingo Molnar
parent 37350e3b26
commit f5a98866e5
2 changed files with 11 additions and 6 deletions
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10
kernel/locking/rtmutex.c
View file

@ -1586,12 +1586,10 @@ void __sched rt_mutex_futex_unlock(struct rt_mutex *lock)
void __rt_mutex_init(struct rt_mutex *lock, const char *name, void __rt_mutex_init(struct rt_mutex *lock, const char *name,
struct lock_class_key *key) struct lock_class_key *key)
{ {
lock->owner = NULL; debug_check_no_locks_freed((void *)lock, sizeof(*lock));
raw_spin_lock_init(&lock->wait_lock); lockdep_init_map(&lock->dep_map, name, key, 0);
lock->waiters = RB_ROOT_CACHED;
if (name && key) __rt_mutex_basic_init(lock);
debug_rt_mutex_init(lock, name, key);
} }
EXPORT_SYMBOL_GPL(__rt_mutex_init); EXPORT_SYMBOL_GPL(__rt_mutex_init);
@ -1612,7 +1610,7 @@ EXPORT_SYMBOL_GPL(__rt_mutex_init);
void rt_mutex_init_proxy_locked(struct rt_mutex *lock, void rt_mutex_init_proxy_locked(struct rt_mutex *lock,
struct task_struct *proxy_owner) struct task_struct *proxy_owner)
{ {
__rt_mutex_init(lock, NULL, NULL); __rt_mutex_basic_init(lock);
rt_mutex_set_owner(lock, proxy_owner); rt_mutex_set_owner(lock, proxy_owner);
} }

7
kernel/locking/rtmutex_common.h
View file

@ -100,6 +100,13 @@ enum rtmutex_chainwalk {
RT_MUTEX_FULL_CHAINWALK, RT_MUTEX_FULL_CHAINWALK,
}; };
static inline void __rt_mutex_basic_init(struct rt_mutex *lock)
{
lock->owner = NULL;
raw_spin_lock_init(&lock->wait_lock);
lock->waiters = RB_ROOT_CACHED;
}
/* /*
* PI-futex support (proxy locking functions, etc.): * PI-futex support (proxy locking functions, etc.):
*/ */