Re: [patch V3 15/64] rtmutex: Provide rt_mutex_base_is_locked()
From: Davidlohr Bueso
Date: Sun Aug 08 2021 - 16:41:30 EST
+/**
+ * rt_mutex_base_is_locked - is the rtmutex locked
+ * @lock: the mutex to be queried
+ *
+ * Returns true if the mutex is locked, false if unlocked.
+ */
+static inline bool rt_mutex_base_is_locked(struct rt_mutex_base *lock)
+{
+ return lock->owner != NULL;
Does this want to be READ_ONCE()? While not a big deal because
it's ultimately only used by drm debugging, I don't see any harm
in avoiding potential tearing.
Thanks,
Davidlohr