Function report

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:block\blk-cgroup.c Create Date:2022-07-28 17:39:20
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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Annotation kernel can get tool activityDownload SCCTChinese

Name:blkg_lookup_slowpath

Proto:struct blkcg_gq *blkg_lookup_slowpath(struct blkcg *blkcg, struct request_queue *q, bool update_hint)

Type:struct blkcg_gq

Parameter:

TypeParameterName
struct blkcg *blkcg
struct request_queue *q
boolupdate_hint
208  blkg = adix_tree_lookup - perform lookup operation on a radix tree*@root: radix tree root*@index: index key* Lookup the item at the position @index in the radix tree @root.* This function can be called under rcu_read_lock, however the caller
209  If blkg && Pointer to the associated request_queue == q Then
210  If update_hint Then
211  lockdep_assert_held( & queue_lock)
212  cu_assign_pointer() - assign to RCU-protected pointer*@p: pointer to assign to*@v: value to assign (publish)* Assigns the specified value to the specified RCU-protected* pointer, ensuring that any concurrent RCU readers will see* any prior initialization(blkg_hint, blkg)
214  Return blkg
217  Return NULL