start = phys_start_pfn << PAGE_SHIFT;
size = nr_pages * PAGE_SIZE;
- ret = release_mem_region_adjustable(&iomem_resource, start, size);
+
+ /* in the ZONE_DEVICE case device driver owns the memory region */
+ if (!is_dev_zone(zone))
+ ret = release_mem_region_adjustable(&iomem_resource, start, size);
if (ret) {
resource_size_t endres = start + size - 1;
return 0;
}
-int zone_for_memory(int nid, u64 start, u64 size, int zone_default)
+int zone_for_memory(int nid, u64 start, u64 size, int zone_default,
+ bool for_device)
{
+#ifdef CONFIG_ZONE_DEVICE
+ if (for_device)
+ return ZONE_DEVICE;
+#endif
if (should_add_memory_movable(nid, start, size))
return ZONE_MOVABLE;
}
/* we are OK calling __meminit stuff here - we have CONFIG_MEMORY_HOTPLUG */
-int __ref add_memory(int nid, u64 start, u64 size)
+int __ref add_memory_resource(int nid, struct resource *res)
{
+ u64 start, size;
pg_data_t *pgdat = NULL;
bool new_pgdat;
bool new_node;
- struct resource *res;
int ret;
+ start = res->start;
+ size = resource_size(res);
+
ret = check_hotplug_memory_range(start, size);
if (ret)
return ret;
- res = register_memory_resource(start, size);
- ret = -EEXIST;
- if (!res)
- return ret;
-
{ /* Stupid hack to suppress address-never-null warning */
void *p = NODE_DATA(nid);
new_pgdat = !p;
}
/* call arch's memory hotadd */
- ret = arch_add_memory(nid, start, size);
+ ret = arch_add_memory(nid, start, size, false);
if (ret < 0)
goto error;
/* rollback pgdat allocation and others */
if (new_pgdat)
rollback_node_hotadd(nid, pgdat);
- release_memory_resource(res);
memblock_remove(start, size);
out:
mem_hotplug_done();
return ret;
}
+EXPORT_SYMBOL_GPL(add_memory_resource);
+
+int __ref add_memory(int nid, u64 start, u64 size)
+{
+ struct resource *res;
+ int ret;
+
+ res = register_memory_resource(start, size);
+ if (!res)
+ return -EEXIST;
+
+ ret = add_memory_resource(nid, res);
+ if (ret < 0)
+ release_memory_resource(res);
+ return ret;
+}
EXPORT_SYMBOL_GPL(add_memory);
#ifdef CONFIG_MEMORY_HOTREMOVE