函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:block\elevator.c Create Date:2022-07-27 18:33:02
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：elv_attr_show

函数原型：static ssize_t elv_attr_show(struct kobject *kobj, struct attribute *attr, char *page)

返回类型：ssize_t

参数：

类型参数名称
struct kobject *kobj
struct attribute *attr
char *page
441  entry等于to_elv(attr)
445  如果非show则返回:负EIO
448  e等于container_of - cast a member of a structure out to the containing structure*@ptr: the pointer to the member.*@type: the type of the container struct this is embedded in.*@member: the name of the member within the struct.(kobj, structelevator_queue, kobj)
449  mutex_lock( & sysfs_lock)
450  error等于如果type则show(e, page)否则负ENOENT
451  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.
452  返回:error