refcount_dec_and_lock

Name:_dec_and_lock_irqsave - return holding spinlock with disabled* interrupts if able to decrement refcount to 0*@r: the refcount*@lock: the spinlock to be locked*@flags: saved IRQ-flags if the is acquired* Same as refcount_dec_and_lock() above except that

Proto:bool refcount_dec_and_lock_irqsave(refcount_t *r, spinlock_t *lock, unsigned long *flags)

Type:bool

Parameter:

Type	Parameter	Name
refcount_t *	r
spinlock_t *	lock
unsigned long *	flags

175

If _dec_not_one - decrement a refcount if it is not 1*@r: the refcount* No atomic_t counterpart, it decrements unless the value is 1, in which case* it will return false Then Return false

178

spin_lock_irqsave(lock, * flags)

179

If Not _dec_and_test - decrement a refcount and test if it is 0*@r: the refcount* Similar to atomic_dec_and_test(), it will WARN on underflow and fail to* decrement when saturated at REFCOUNT_SATURATED Then

180

spin_unlock_irqrestore(lock, * flags)

181

Return false

184

Return true

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Function report