any hint?

Hi there. I'm playing kernel module development challenge. I read http://lxr.free-electrons.com/source/Documentation/CodingStyle and learn how to write right code. I am sure that there's no coding style error in following files. But challenge system say that there are coding style error. Any hint for me? Ps: I tried to submit answer without meaningless comment. but It's not correct. File1.c

#include <linux/module.h> #include <linux/kernel.h>

int hello(void) { printk(KERN_DEBUG "Hello World!\n"); return 0; }

module_init(hello); MODULE_LICENSE("GPL");

File2.c

#include <linux/module.h> #include <linux/kernel.h> #include <asm/delay.h> #include <linux/slab.h>

int do_work(int *my_int, int retval) { int x; int y = *my_int; int z;

for (x = 0; x < *my_int; ++x) udelay(10);

if (y < 10) /* That was a long sleep, tell userspace about it */ printk("We slept a long time!");

z = x * y;

return z; }

int my_init(void) { int x = 10;

x = do_work(&x, x);

return x; }

void my_exit(void) { return; }

module_init(my_init); module_exit(my_exit);