Function report

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:include\asm-generic\qspinlock.h Create Date:2022-07-28 08:24:13
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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Name:queued_spin_trylock - try to acquire the queued spinlock*@lock : Pointer to queued spinlock structure* Return: 1 if lock acquired, 0 if failed

Proto:static __always_inline int queued_spin_trylock(struct qspinlock *lock)

Type:int

Parameter:

TypeParameterName
struct qspinlock *lock
60  val = atomic_read( & val)
62  If Value for the false possibility is greater at compile time(val) Then Return 0
65  Return Value is more likely to compile time(atomic_try_cmpxchg_acquire( & val, & val, _Q_LOCKED_VAL))
Caller
NameDescribe
queued_spin_lock_slowpathqueued_spin_lock_slowpath - acquire the queued spinlock*@lock: Pointer to queued spinlock structure*@val: Current value of the queued spinlock 32-bit word* (queue tail, pending bit, lock value)* fast : slow : unlock* : :* uncontended (0,0,0) -:--> (0,0,1)