函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:kernel\watchdog.c Create Date:2022-07-27 12:50:09
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：mmon function for watchdog, nmi_watchdog and soft_watchdog parameter* caller | table->data points to | 'which'* -------------------|----------------------------|--------------------------* proc_watchdog | watchdog_user_enabled | NMI_WATCHDOG_ENABLED |* |

函数原型：static int proc_watchdog_common(int which, struct ctl_table *table, int write, void __user *buffer, size_t *lenp, loff_t *ppos)

返回类型：int

参数：

类型参数名称
intwhich
struct ctl_table *table
intwrite
void __user *buffer
size_t *lenp
loff_t *ppos
685  param等于data
687  mutex_lock( & watchdog_mutex)
689  如果非write则
694  param等于watchdog_enabled按位与which的值不等于0
695  err等于指定大小读sysctl整数向量
696  否则
697  old等于READ_ONCE( * param)
698  err等于指定大小读sysctl整数向量
699  如果非err且old不等于READ_ONCE( * param)则Propagate any changes to the watchdog threads
702  mutex_unlock - release the mutex*@lock: the mutex to be released* Unlock a mutex that has been locked by this task previously.* This function must not be used in interrupt context. Unlocking* of a not locked mutex is not allowed.
703  返回:err
调用者
名称描述
proc_watchdog/proc/sys/kernel/watchdog
proc_nmi_watchdog/proc/sys/kernel/nmi_watchdog
proc_soft_watchdog/proc/sys/kernel/soft_watchdog