[PATCH] x86_64: add x86-64 support for memory hot-add

Add x86-64 specific memory hot-add functions, Kconfig options,
and runtime kernel page table update functions to make
hot-add usable on x86-64 machines.  Also, fixup the nefarious
conditional locking and exports pointed out by Andi.

Tested on Intel and IBM x86-64 memory hot-add capable systems.

Signed-off-by: Matt Tolentino <matthew.e.tolentino@intel.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 6 insertions, 1 deletions

diff --git a/arch/x86_64/Kconfig b/arch/x86_64/Kconfig
index 787feff0e8a5..2f9deca31cc9 100644
--- a/arch/x86_64/Kconfig
+++ b/arch/x86_64/Kconfig
@@ -305,7 +305,11 @@ config ARCH_DISCONTIGMEM_DEFAULT
 
 config ARCH_SPARSEMEM_ENABLE
         def_bool y
-        depends on NUMA
+        depends on (NUMA || EXPERIMENTAL)
+
+config ARCH_MEMORY_PROBE
+        def_bool y
+        depends on MEMORY_HOTPLUG
 
 config ARCH_FLATMEM_ENABLE
         def_bool y
@@ -315,6 +319,7 @@ source "mm/Kconfig"
 
 config HAVE_ARCH_EARLY_PFN_TO_NID
         def_bool y
+        depends on NUMA
 
 config NR_CPUS
         int "Maximum number of CPUs (2-256)"