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That is all the code, could it be how I made the system call? This is how I called it:
retval = syscall(__NR_processdisplay, 1);

I still get the modpost warning and 0 for procnumk

I'm having trouble passing a variable (specifically an integer) from user mode to kernel mode. This is my code for my system call:


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