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

static void *ptr;

static int my_vmalloc_init(void)
{
    unsigned long size = 8192;
    ptr = vmalloc(size);
    if (!ptr) {
        /* handle error */
        pr_err("memory allocation failed\n");
        return -ENOMEM;
    } else {
        pr_info("Memory allocated successfully\n");
    }
    return 0;
}

static void my_vmalloc_exit(void)
{
    vfree(ptr); //free the allocated memory
    pr_info("Memory freed\n");
}

module_init(my_vmalloc_init);
module_exit(my_vmalloc_exit);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("john Madieu <john.madieu@gmail.com>");