Linux kernel Tasklet Small task mechanism

In the interrupt mechanism in the kernel, in order to prevent the problem of resolving interrupt nesting (preventing one interrupt from interrupting another interrupt), introduce the small task mechanism:

Using a small task mechanism requires three steps:

First: Define a class of struct tasklet_struct;

The second step: Initialize the Taskelet will handle the function of the task and Takslet task bundle;

The third step: dispatch Tasklet:tasklet_schedule (&tasklet);

　　　　

  A#include <linux/delay.h> -#include <linux/clk.h> -#include <linux/miscdevice.h> the#include <linux/io.h> -#include <linux/ioport.h> -#include <asm/uaccess.h> -   +#include <linux/gpio.h> -#include <mach/gpio.h> +#include <plat/gpio-cfg.h> A   atModule_license ("GPL");  -Module_author ("Bunfly");  -   - voidMy_tasklet_func (unsignedLongdata);  - structtasklet_struct My_tasklet; -   in intTest_init () - {  toPrintk"Hello kernel\n");  +Tasklet_init (&my_tasklet,my_tasklet_func,0);  -Tasklet_schedule (&My_tasklet);  the     return 0;  * }  $  Panax Notoginseng voidtest_exit () - {  theTasklet_kill (&My_tasklet);  +Printk"exit\n");  A }  the   +Module_init (test_init); -Module_exit (test_exit); $   $ voidMy_tasklet_func (unsignedLongdata) - {  -Printk"Wang Wang wang\n");  the }  - 

Linux kernel Tasklet Small task mechanism