Function report

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:lib\lockref.c Create Date:2022-07-28 06:19:11
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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Name:lockref_get_or_lock - Increments count unless the count is 0 or dead*@lockref: pointer to lockref structure* Return: 1 if count updated successfully or 0 if count was zero* and we got the lock instead.

Proto:int lockref_get_or_lock(struct lockref *lockref)

Type:int

Parameter:

TypeParameterName
struct lockref *lockref
122  Note that the "cmpxchg()" reloads the "old" value for the* failure case.(count++;If count <= 0 Then Break;, Return 1;)
130  spin_lock( & lock)
131  If count <= 0 Then Return 0
133  count++
134  spin_unlock( & lock)
135  Return 1