Add sample.c

sample.c

@@ -0,0 +1,56 @@
+#include <linux/list.h>
+#include <linux/types.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Sample");
+MODULE_AUTHOR("SGG");
+
+static LIST_HEAD(birthday_list);
+
+struct birthday {
+	int day;
+	int month;
+	int year;
+	struct list_head list;
+};
+
+int sample_init(void)
+{
+	printk(KERN_INFO "Loading Module...\n");
+	struct birthday *person;
+	int i;
+	for(i = 0; i < 5 ;i++) {
+		person = kmalloc(sizeof(*person), GFP_KERNEL);
+		person->day = 2+i;
+		person->month = 8;
+		person->year = 1995;
+		INIT_LIST_HEAD(&person->list);
+		list_add_tail(&person->list, &birthday_list);
+	}
+	printk(KERN_INFO "Loading Module\n");
+	printk(KERN_INFO "This list be constructed\n");
+	list_for_each_entry(person, &birthday_list, list) {
+		printk(KERN_INFO "Day: %d Month: %d Year: %d\n", person->day, person->month, person->year);
+	}
+	printk(KERN_INFO "Module Loaded.\n");
+	return 0;
+}	
+
+void sample_exit(void)
+{
+	printk(KERN_INFO "Removing Module...\n");
+	struct birthday *person, *next;
+	list_for_each_entry_safe(person, next, &birthday_list, list) {
+		printk(KERN_INFO "Freeing node");
+		list_del(&person->list);
+		kfree(person);
+	}
+	printk(KERN_INFO "Removing Module\n");
+}
+
+module_init(birthday_list_init);
+module_exit(birthday_list_exit);