[PATCH] x86_64: Use correct PUD for memory hotadd

Memory >39bits has a different PUD.

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

diff --git a/arch/x86_64/mm/init.c b/arch/x86_64/mm/init.c
index 40ed13d..675a456 100644 (file)
--- a/arch/x86_64/mm/init.c
+++ b/arch/x86_64/mm/init.c
@@ -344,7 +344,7 @@ void __meminit init_memory_mapping(unsigned long start, unsigned long end)
                pud_t *pud;
 
                if (after_bootmem)
-                       pud = pud_offset_k(pgd, __PAGE_OFFSET);
+                       pud = pud_offset_k(pgd, start & PGDIR_MASK);
                else
                        pud = alloc_low_page(&map, &pud_phys);