Function report |
Source Code:kernel\locking\qspinlock.c |
Create Date:2022-07-28 09:51:38 |
| Last Modify:2020-03-12 14:18:49 | Copyright©Brick |
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| Annotation kernel can get tool activity | Download SCCT | Chinese |
Name:xchg_tail - Put in the new queue tail code word & retrieve previous one*@lock : Pointer to queued spinlock structure*@tail : The new queue tail code word* Return: The previous queue tail code word* xchg(lock, tail), which heads an address dependency*
Proto:static __always_inline unsigned int xchg_tail(struct qspinlock *lock, unsigned int tail)
Type:unsigned int
Parameter:
| Type | Parameter | Name |
|---|---|---|
| struct qspinlock * | lock | |
| unsigned int | tail |
| 181 | Return xchg_relaxed( & tail, tail >> _Q_TAIL_OFFSET) << _Q_TAIL_OFFSET |
| Name | Describe |
|---|---|
| queued_spin_lock_slowpath | queued_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) |
| Source code conversion tool public plug-in interface | X |
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