powerpc/mm: Add option for non-atomic PTE updates to ppc64
ppc32 has it already, add it to ppc64 as a preliminary for adding
support for Book3E 64-bit support
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
diff --git a/arch/powerpc/include/asm/pte-hash64.h b/arch/powerpc/include/asm/pte-hash64.h
index b61b7e4..0419eeb 100644
--- a/arch/powerpc/include/asm/pte-hash64.h
+++ b/arch/powerpc/include/asm/pte-hash64.h
@@ -41,6 +41,8 @@
#define _PTEIDX_SECONDARY 0x8
#define _PTEIDX_GROUP_IX 0x7
+/* Hash table based platforms need atomic updates of the linux PTE */
+#define PTE_ATOMIC_UPDATES 1
#ifdef CONFIG_PPC_64K_PAGES
#include <asm/pte-hash64-64k.h>