percpu_ref_put

Name:percpu_ref_put_many - decrement a percpu refcount*@ref: percpu_ref to put*@nr: number of references to put* Decrement the refcount, and if 0, call the release function (which was passed* to percpu_ref_init())

Proto:static inline void percpu_ref_put_many(struct percpu_ref *ref, unsigned long nr)

Type:void

Parameter:

Type	Parameter	Name
struct percpu_ref *	ref
unsigned long	nr

286

__percpu * percpu_count

288

_read_lock() - mark the beginning of an RCU read-side critical section* When synchronize_rcu() is invoked on one CPU while other CPUs* are within RCU read-side critical sections, then the* synchronize_rcu() is guaranteed to block until after all the other

290

If Internal helper. Don't use outside percpu-refcount proper. The* function doesn't return the pointer and let the caller test it for NULL* because doing so forces the compiler to generate two conditional Then this_cpu_sub( * percpu_count, nr)

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Else if Value for the false possibility is greater at compile time(atomic_long_sub_and_test(nr, & count)) Then release(ref)

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_read_unlock() - marks the end of an RCU read-side critical section.* In most situations, rcu_read_unlock() is immune from deadlock.* However, in kernels built with CONFIG_RCU_BOOST, rcu_read_unlock()

**Caller**
Name	Describe
io_free_req_many

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Function report