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#include <linux/kthread.h>
#include <linux/module.h>
static DECLARE_COMPLETION(completion);
static int thread_sample(void *data)
{
int ret = 0;
allow_signal(SIGINT);
while (!kthread_should_stop()) {
ret = wait_for_completion_interruptible(&completion);
if (ret == -ERESTARTSYS) {
pr_debug("interrupted\n");
return -EINTR;
}
/*
perform here a useful work in scheduler context
*/
}
return ret;
}
static struct task_struct *thread;
static int thread_sample_init(void)
{
int ret = 0;
thread = kthread_run(thread_sample, NULL, "%s", KBUILD_MODNAME);
if (IS_ERR(thread)) {
ret = PTR_ERR(thread);
goto exit;
}
complete(&completion);
exit:
return ret;
}
static void thread_sample_exit(void)
{
if (!IS_ERR_OR_NULL(thread)) {
send_sig(SIGINT, thread, 1);
kthread_stop(thread);
}
}
module_init(thread_sample_init);
module_exit(thread_sample_exit);
MODULE_LICENSE("Dual BSD/GPL");
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