Function report

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:kernel\watchdog.c Create Date:2022-07-28 11:45:31
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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Name:mmon function for watchdog, nmi_watchdog and soft_watchdog parameter* caller | table->data points to | 'which'* -------------------|----------------------------|--------------------------* proc_watchdog | watchdog_user_enabled | NMI_WATCHDOG_ENABLED |* |

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

Type:int

Parameter:

TypeParameterName
intwhich
struct ctl_table *table
intwrite
void __user *buffer
size_t *lenp
loff_t *ppos
685  param = data
687  mutex_lock( & watchdog_mutex)
689  If Not write Then
694  param = (watchdog_enabled & which) != 0
695  err = read a vector of integers with min/max values
696  Else
697  old = READ_ONCE( * param)
698  err = read a vector of integers with min/max values
699  If Not err && old != READ_ONCE( * param) Then 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  Return err
Caller
NameDescribe
proc_watchdog/proc/sys/kernel/watchdog
proc_nmi_watchdog/proc/sys/kernel/nmi_watchdog
proc_soft_watchdog/proc/sys/kernel/soft_watchdog