Function report |
Source Code:kernel\locking\qspinlock.c |
Create Date:2022-07-28 09:51:36 |
| Last Modify:2020-03-12 14:18:49 | Copyright©Brick |
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| Annotation kernel can get tool activity | Download SCCT | Chinese |
Name:We must be able to distinguish between no-tail and the tail at 0:0,* therefore increment the cpu number by one.
Proto:static inline __pure unsigned int encode_tail(int cpu, int idx)
Type:unsigned int
Parameter:
| Type | Parameter | Name |
|---|---|---|
| int | cpu | |
| int | idx |
| 118 | tail = cpu + 1 << _Q_TAIL_CPU_OFFSET |
| 119 | tail |= idx << _Q_TAIL_IDX_OFFSET |
| 121 | Return tail |
| 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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