Caller-controlled printk ratelimiting
bool printk_timed_ratelimit(unsigned long * caller_jiffies, unsigned int interval_msecs);
caller_jiffies
pointer to caller's state
interval_msecs
minimum interval between prints
printk_timed_ratelimit returns true if more than interval_msecs milliseconds have elapsed since the last time printk_timed_ratelimit returned true.