Why is pr_debug of the Linux kernel not giving any output?

Question

I have a loadable kernel module and its init is as given below

static int __init id_init(void)
{
    struct identity *temp;

    /* some code which is not re         


        

Answer 1

Add following to Makefile, assuming filename.c is the module source file.

CFLAGS_filename.o := -DDEBUG

not

CFLAGS_[filename].o := -DDEBUG

Refer https://www.kernel.org/doc/local/pr_debug.txt