idr_preload

Name:dr_preload - preload for idr_alloc()*@gfp_mask: allocation mask to use for preloading* Preallocate memory to use for the next call to idr_alloc(). This function* returns with preemption disabled. It will be enabled by idr_preload_end().

Proto:void idr_preload(gfp_t gfp_mask)

Type:void

Parameter:

Type	Parameter	Name
gfp_t	gfp_mask

1481

If Load up this CPU's radix_tree_node buffer with sufficient objects to* ensure that the addition of a single element in the tree cannot fail Then 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.()

**Caller**
Name	Describe
irq_timings_alloc
cgroup_idr_alloc	IDR wrappers which synchronize using cgroup_idr_lock
bpf_map_alloc_id
bpf_prog_alloc_id
btf_alloc_id

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Function report