函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:kernel\signal.c Create Date:2022-07-27 10:15:45
Last Modify:2020-03-17 13:28:47 Copyright©Brick
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函数名称：__lock_task_sighand

函数原型：struct sighand_struct *__lock_task_sighand(struct task_struct *tsk, unsigned long *flags)

返回类型：struct sighand_struct

参数：

类型参数名称
struct task_struct *tsk
unsigned long *flags
1368  _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
1369  循环
1370  sighand等于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().(sighand)
1371  如果此条件成立可能性小(为编译器优化)(sighand == NULL)则退出
1385  spin_lock_irqsave( & siglock, * flags)
1386  如果此条件成立可能性大(为编译器优化)(sighand == sighand)则退出
1388  spin_unlock_irqrestore( & siglock, * flags)
1390  _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()
1392  返回:sighand
调用者
名称描述
lock_task_sighand