函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:block\blk-sysfs.c Create Date:2022-07-27 18:37:17
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：queue_attr_show

函数原型：static ssize_t queue_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
796  entry等于to_queue(attr)
797  q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, structrequest_queue, kobj)
801  如果非show则返回:负EIO
803  mutex_lock( & sysfs_lock)
804  res等于show(q, page)
805  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.
806  返回:res