函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:kernel\trace\trace.c Create Date:2022-07-27 13:06:46
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：tracing_cpumask_read

函数原型：static ssize_t tracing_cpumask_read(struct file *filp, char __user *ubuf, size_t count, loff_t *ppos)

返回类型：ssize_t

参数：

类型参数名称
struct file *filp
char __user *ubuf
size_tcount
loff_t *ppos
4535  tr等于s or device private pointer
4539  len等于snprintf - Format a string and place it in a buffer*@buf: The buffer to place the result into*@size: The size of the buffer, including the trailing null space*@fmt: The format string to use*@加1
4541  mask_str等于开辟内存
4542  如果非mask_str则返回:负ENOMEM
4545  len等于snprintf - Format a string and place it in a buffer*@buf: The buffer to place the result into*@size: The size of the buffer, including the trailing null space*@fmt: The format string to use*@
4547  如果len大于等于count则
4548  count等于负EINVAL
4549  转到:out_err
4551  count等于simple_read_from_buffer(ubuf, count, ppos, mask_str, len)
4553  out_err :
4554  kfree(mask_str)
4556  返回:count