[PATCH] x86_64: Support memory hotadd without sparsemem
Memory hotadd doesn't need SPARSEMEM, but can be handled by just preallocating
mem_maps. This only needs some untangling of ifdefs to enable the necessary
code even without SPARSEMEM.
Originally from Keith Mannthey, hacked by AK.
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/include/linux/init.h b/include/linux/init.h
index ed0ac7c..93dcbe1 100644
--- a/include/linux/init.h
+++ b/include/linux/init.h
@@ -245,7 +245,8 @@
#define __cpuexitdata __exitdata
#endif
-#ifdef CONFIG_MEMORY_HOTPLUG
+#if defined(CONFIG_MEMORY_HOTPLUG) || defined(CONFIG_ACPI_HOTPLUG_MEMORY) \
+ || defined(CONFIG_ACPI_HOTPLUG_MEMORY_MODULE)
#define __meminit
#define __meminitdata
#define __memexit
diff --git a/include/linux/memory_hotplug.h b/include/linux/memory_hotplug.h
index 968b1aa..4ca3e6a 100644
--- a/include/linux/memory_hotplug.h
+++ b/include/linux/memory_hotplug.h
@@ -58,8 +58,6 @@
/* need some defines for these for archs that don't support it */
extern void online_page(struct page *page);
/* VM interface that may be used by firmware interface */
-extern int add_memory(u64 start, u64 size);
-extern int remove_memory(u64 start, u64 size);
extern int online_pages(unsigned long, unsigned long);
/* reasonably generic interface to expand the physical pages in a zone */
@@ -92,11 +90,6 @@
return -ENOSYS;
}
-static inline int __add_pages(struct zone *zone, unsigned long start_pfn,
- unsigned long nr_pages)
-{
- return mhp_notimplemented(__FUNCTION__);
-}
#endif /* ! CONFIG_MEMORY_HOTPLUG */
static inline int __remove_pages(struct zone *zone, unsigned long start_pfn,
unsigned long nr_pages)
@@ -105,4 +98,11 @@
dump_stack();
return -ENOSYS;
}
+
+#if defined(CONFIG_MEMORY_HOTPLUG) || defined(CONFIG_ACPI_HOTPLUG_MEMORY) \
+ || defined(CONFIG_ACPI_HOTPLUG_MEMORY_MODULE)
+extern int add_memory(u64 start, u64 size);
+extern int remove_memory(u64 start, u64 size);
+#endif
+
#endif /* __LINUX_MEMORY_HOTPLUG_H */