alloc_rtree

函数名称：alloc_rtree_node - Allocate a new node and add it to the radix tree.* This function is used to allocate inner nodes as well as the* leave nodes of the radix tree. It also adds the node to the* corresponding linked list passed in by the *list parameter.

函数原型：static struct rtree_node *alloc_rtree_node(gfp_t gfp_mask, int safe_needed, struct chain_allocator *ca, struct list_head *list)

返回类型：struct rtree_node

参数：

类型	参数	名称
gfp_t	gfp_mask
int	safe_needed
struct chain_allocator *	ca
struct list_head *	list

**调用者**
名称	描述
add_rtree_block	add_rtree_block - Add a new leave node to the radix tree.* The leave nodes need to be allocated in order to keep the leaves* linked list in order. This is guaranteed by the zone->blocks* counter.

函数逻辑报告