函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:arch\x86\include\asm\qspinlock.h Create Date:2022-07-27 09:24:01
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：queued_fetch_set_pending_acquire

函数原型：static __always_inline unsigned int queued_fetch_set_pending_acquire(struct qspinlock *lock)

返回类型：unsigned int

参数：

类型参数名称
struct qspinlock *lock
23  val等于GEN_BINARY_RMWcc(LOCK_PREFIX"btsl", 计数器, c, "I", _Q_PENDING_OFFSET)乘_Q_PENDING_VAL
25  val或等于atomic_read( & val)按位与_Q_PENDING_MASK的反
27  返回:val
调用者
名称描述
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)