blocking_notifier_chain_unregister — Remove notifier from a blocking notifier chain
int blocking_notifier_chain_unregister
(struct blocking_notifier_head * nh, struct notifier_block * n);
Pointer to head of the blocking notifier chain
Entry to remove from notifier chain
Removes a notifier from a blocking notifier chain. Must be called from process context.
Returns zero on success or -ENOENT on failure.