bdi_get_by

函数名称：di_get_by_id - lookup and get bdi from its id*@id: bdi id to lookup* Find bdi matching @id and get it. Returns NULL if the matching bdi* doesn't exist or is already unregistered.

函数原型：struct backing_dev_info *bdi_get_by_id(u64 id)

返回类型：struct backing_dev_info

参数：

类型	参数	名称
u64	id

919

struct backing_dev_info * bdi = NULL

922

spin_lock_bh( & di_lock protects bdi_tree and updates to bdi_list. bdi_list has RCU* reader side locking.)

923

p等于bdi_lookup_rb_node(id, NULL)

924

如果p则

925

bdi等于rb_entry( * p, structbacking_dev_info, rb_node)

926

bdi_get(bdi)

928

spin_unlock_bh( & di_lock protects bdi_tree and updates to bdi_list. bdi_list has RCU* reader side locking.)

930

返回:bdi

源代码转换工具开放的插件接口	X
支持：c/c++/esqlc/java Oracle/Informix/Mysql 插件可实现：逻辑报告代码生成和批量转换代码

函数逻辑报告