static void intrpt_routine(void *);
/* The task queue structure for this task, from tqueue.h */
static struct tq_struct Task = {
NULL, /* Next item in list - queue_task will do
* this for us */
0, /* A flag meaning we haven't been inserted
* into a task queue yet */
intrpt_routine, /* The function to run */
NULL /* The void* parameter for that function */
};
/* This function will be called on every timer
* interrupt. Notice the void* pointer - task functions
* can be used for more than one purpose, each time
* getting a different parameter. */
static void intrpt_routine(void *irrelevant) {
/* Increment the counter */
TimerIntrpt++;
/* If cleanup wants us to die */
if (WaitQ != NULL) wake_up(&WaitQ);
/* Now cleanup_module can return */
else queue_task(&Task, &tq_timer);
/* Put ourselves back in the task queue */
}
/* Put data into the proc fs file. */
int procfile_read(char *buffer, char **buffer_location, off_t offset, int buffer_length, int zero) {
int len; /* The number of bytes actually used */
/* This is static so it will still be in memory
* when we leave this function */
static char my_buffer[80];
static int count = 1;
/* We give all of our information in one go, so if
* the anybody asks us if we have more information
* the answer should always be no. */
if (offset > 0) return 0;
/* Fill the buffer and get its length */
len = sprintf(my_buffer, "Timer was called %d times so far\n", TimerIntrpt);
count++;
/* Tell the function which called us where the buffer is */
*buffer_location = my_buffer;
/* Return the length */
return len;
}
struct proc_dir_entry Our_Proc_File = {
0, /* Inode number - ignore, it will be filled by
* proc_register_dynamic */
5, /* Length of the file name */
"sched", /* The file name */
S_IFREG | S_IRUGO,
/* File mode - this is a regular file which can
* be read by its owner, its group, and everybody else */
1, /* Number of links (directories where
* the file is referenced) */
0, 0, /* The uid and gid for the file - we give it to root */
80, /* The size of the file reported by ls. */
NULL, /* functions which can be done on the
* inode (linking, removing, etc.) - we don't
* support any. */
procfile_read,
/* The read function for this file, the function called
* when somebody tries to read something from it. */
NULL
/* We could have here a function to fill the
* file's inode, to enable us to play with
* permissions, ownership, etc. */
};
/* Initialize the module - register the proc file */
int init_module() {
/* Put the task in the tq_timer task queue, so it
