Adding new notifiers and calling the notifier call chain.
Assume that are two drivers and one driver will have to notify the other.
Driver-1
/* atomic notifier initialization */
ATOMIC_NOTIFIER_HEAD(simple_notifier_list);
unsigned long val;
struct device_info *di;
/* later in some part of the driver call the notifier call chain */
atomic_notifier_call_chain(&simple_notifier_list, val, (void *)di);
Driver-2
static int notify_call_handler(notifier_block *n, unsigned long event, void *data)
{
}
static struct notifier_block simple_nb = {
.notifier_call = simple_notify_handler;
}
atomic_notifier_chain_register(&simple_notifier_list, &simple_nb)
