debug_lockdep_rcu_enabled

Name:debug_lockdep_rcu_enabled

Proto:int notrace debug_lockdep_rcu_enabled(void)

Type:int

Parameter:Nothing

251

Return rcu_scheduler_active != RCU_SCHEDULER_INACTIVE && We want to turn all lock-debugging facilities on/off at once,* via a global flag. The reason is that once a single bug has been* detected and reported, there might be cascade of followup bugs* that would just muddy the log. So we report the first one and && lockdep_recursion == 0

**Caller**
Name	Describe
rcu_read_lock_held_common	_read_lock_held_common() - might we be in RCU-sched read-side critical section?@ret: Best guess answer if lockdep cannot be relied on Returns true if lockdep must be ignored, in which case ret contains the best guess described below
srcu_read_lock_held	srcu_read_lock_held - might we be in SRCU read-side critical section?@ssp: The srcu_struct structure to check If CONFIG_DEBUG_LOCK_ALLOC is selected, returns nonzero iff in an SRCU* read-side critical section

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