How to use pr_debug

[Valdis.Kletnieks at vt.edu]

On Wed, 26 Feb 2014 11:35:23 -0800, m silverstri said:
> I am using 'pr_debug()' to print debug statements. But I don't see
> anything in my serial console. But when I use pr_info(), I see the
> debug statements.
> Do I need to do anything to see pr_debug()?

You probably need a #define DEBUG.  Also, check your console logging
level, make sure it's set to output debug-level to the console.

/proc/sys/kernel/printk and 'dmesg --console-level' are your friends.
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