graph_lock

Name:graph_lock

Proto:static int graph_lock(void)

Type:int

Parameter:Nothing

92

r sched/core.c and kernel_lock.c: ( & lockdep_lock: protects the lockdep graph, the hashes and the* class/list/hash allocators.* This is one of the rare exceptions where it's justified* to use a raw spinlock - we really dont want the spinlock* code to recurse back into the lockdep code...)

99

If Not 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 Then

100

arch_spin_unlock( & lockdep_lock: protects the lockdep graph, the hashes and the* class/list/hash allocators.* This is one of the rare exceptions where it's justified* to use a raw spinlock - we really dont want the spinlock* code to recurse back into the lockdep code...)

101

Return 0

104

lockdep_recursion++

105

Return 1

**Caller**
Name	Describe
lockdep_register_key	Register a dynamically allocated key.
register_lock_class	Register a lock's class in the hash-table, if the class is not present* yet. Otherwise we look it up. We cache the result in the lock object* itself, so actual lookup of the hash should be once per lock object.
lockdep_reset_lock_reg	Remove all information lockdep has about a lock if debug_locks == 1. Free* released data structures from RCU context.
lockdep_unregister_key	Unregister a dynamically allocated key.

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