workqueue用法

# include < linux/ module. h>
# include < linux/ init. h>
# include < linux/ workqueue. h>

static struct workqueue_struct * queue = NULL ;
static struct work_struct work;

static void work_callback( struct work_struct * data)
{
        printk( KERN_ALERT "work callback function./n" ) ;
}

static int __init test_init( void )
{
        queue = create_singlethread_workqueue( "helloworld" ) ;
        if ( ! queue )
                goto err;

        INIT_WORK( & work, work_callback) ;
        queue_work( queue , & work) ;

        return 0;
err:
        return - 1;
}

static void __exit test_exit( void )
{
        destroy_workqueue( queue ) ;
}

MODULE_LICENSE( "GPL" ) ;

module_init( test_init) ;
module_exit( test_exit) ;