函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:kernel\pid.c Create Date:2022-07-27 10:29:03
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：get_task_pid

函数原型：struct pid *get_task_pid(struct task_struct *task, enum pid_type type)

返回类型：struct pid

参数：

类型参数名称
struct task_struct *task
enum pid_typetype
416  _read_lock() - mark the beginning of an RCU read-side critical section* When synchronize_rcu() is invoked on one CPU while other CPUs* are within RCU read-side critical sections, then the* synchronize_rcu() is guaranteed to block until after all the other
417  pid等于get_pid(cu_dereference() - fetch RCU-protected pointer for dereferencing*@p: The pointer to read, prior to dereferencing* This is a simple wrapper around rcu_dereference_check().( * task_pid_ptr(task, type)))
418  _read_unlock() - marks the end of an RCU read-side critical section.* In most situations, rcu_read_unlock() is immune from deadlock.* However, in kernels built with CONFIG_RCU_BOOST, rcu_read_unlock()
419  返回:pid
调用者
名称描述
kernel_waitid
kernel_wait4
_do_fork分裂进程