函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:kernel\events\callchain.c Create Date:2022-07-27 15:04:06
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称:Used for sysctl_perf_event_max_stack and* sysctl_perf_event_max_contexts_per_stack.

函数原型:int perf_event_max_stack_handler(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
struct ctl_table *table
intwrite
void __user *buffer
size_t *lenp
loff_t *ppos
241  value等于data
242  new_value等于value
243  new_table等于table
245  data等于new_value
246  ret等于指定大小读sysctl整数向量
247  如果ret或非write则返回:ret
250  mutex_lock( & callchain_mutex)
251  如果atomic_read( & nr_callchain_events)则ret等于负EBUSY
253  否则value等于new_value
256  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.
258  返回:ret