Function report

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:include\linux\bit_spinlock.h Create Date:2022-07-28 05:41:30
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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Annotation kernel can get tool activityDownload SCCTChinese

Name:Return true if it was acquired

Proto:static inline int bit_spin_trylock(int bitnum, unsigned long *addr)

Type:int

Parameter:

TypeParameterName
intbitnum
unsigned long *addr
43  Even if we don't have any preemption, we need preempt disable/enable* to be barriers, so that we don't have things like get_user/put_user* that can cause faults and scheduling migrate into our preempt-protected* region.()
50  __acquire(bitlock)
51  Return 1
Caller
NameDescribe
trypin_tag