/*
* MEMORY_HOTPLUG depends on SPARSEMEM in mm/Kconfig, so it is
* OK to have direct references to sparsemem variables in here.
* Must already be protected by mem_hotplug_begin().
*/
static int
memory_block_action(unsigned long phys_index, unsigned long action, int online_type)
{
unsigned long start_pfn;
unsigned long nr_pages = PAGES_PER_SECTION * sections_per_block;
struct page *first_page;
int ret;
start_pfn = section_nr_to_pfn(phys_index);
first_page = pfn_to_page(start_pfn);
switch (action) {
case MEM_ONLINE:
if (!pages_correctly_reserved(start_pfn))
return -EBUSY;
ret = online_pages(start_pfn, nr_pages, online_type);
break;
case MEM_OFFLINE:
ret = offline_pages(start_pfn, nr_pages);
break;
default:
WARN(1, KERN_WARNING "%s(%ld, %ld) unknown action: "
"%ld\n", __func__, phys_index, action, action);
ret = -EINVAL;
}
return ret;
}
int rampage_remove_memory(u64 start, u64 size)
{
unsigned long start_pfn, end_pfn;
int ret;
start_pfn = PFN_DOWN(start);
end_pfn = start_pfn + PFN_DOWN(size);
// mem_hotplug_begin();
ret = offline_pages(start_pfn, end_pfn);
// mem_hotplug_done();
return ret;
}
