内核线程创建

#include <linux/module.h>#include <linux/kernel.h>#include <linux/init.h>#include <linux/sched.h>MODULE_AUTHOR("T-bagwell_CU");MODULE_LICENSE("GPL");static DECLARE_WAIT_QUEUE_HEAD(myevent_waitqueue);extern unsigned int myevent_id;static int example_kernel_thread(void *unused){        DECLARE_WAITQUEUE(wait, current);        daemonize("create_by_T-bag");        allow_signal(SIGKILL);        add_wait_queue(&myevent_waitqueue, &wait);        while(1){                set_current_state(TASK_INTERRUPTIBLE);                schedule();                if(signal_pending(current)){                        break;                }        }        set_current_state(TASK_RUNNING);        remove_wait_queue(&myevent_waitqueue, &wait);        printk(KERN_WARNING "This is in example_kernel_thread\n");        return 0;}static __init int init_hello_kernel_thread(void){        int ret;        ret=kernel_thread(example_kernel_thread, NULL,                                  CLONE_FS | CLONE_FILES | CLONE_SIGHAND | SIGCHLD );        if(unlikely(ret<0)){                printk(KERN_WARNING "kernel_thread create failed \n");        }        else{                printk(KERN_WARNING "kernel_thread create success \n");        }        return 0;}static __exit void cleanup_hello_kernel_thread(void){        printk(KERN_WARNING "kernel_thread exit \n");        return ;}module_init(init_hello_kernel_thread);module_exit(cleanup_hello_kernel_thread);

KERNELDIR = /usr/src/kernels/2.6.27.5-117.fc10.i686PWD := $(shell pwd)obj-m := kernel_thread.omodules:            $(MAKE) -C $(KERNELDIR) M=$(PWD) modulesclean:            rm -rf *.o *.ko test_chrdev Module.* module* *.mod.c