/*! 2016.10.29 study -ing */
int register_die_notifier(struct notifier_block *nb)
{
/*! Do Nothing. */
vmalloc_sync_all();
/*! 리턴 값은 0 */
return atomic_notifier_chain_register(&die_chain, nb);
}
struct vm_struct *alloc_vm_area(unsigned long size)
{
struct vm_struct *area;
area = get_vm_area(size, VM_IOREMAP);
if (area == NULL)
return NULL;
/*
* This ensures that page tables are constructed for this region
* of kernel virtual address space and mapped into init_mm.
*/
if (apply_to_page_range(&init_mm, (unsigned long)area->addr,
area->size, f, NULL)) {
free_vm_area(area);
return NULL;
}
/* Map page directories into every address space. */
vmalloc_sync_all();
return area;
}
int register_die_notifier(struct notifier_block *nb)
{
vmalloc_sync_all();
return atomic_notifier_chain_register(&die_chain, nb);
}
void set_nmi_callback(nmi_callback_t callback)
{
vmalloc_sync_all();
rcu_assign_pointer(nmi_callback, callback);
}
