powerpc: Don't hard code the size of pte page
USE PTRS_PER_PTE to indicate the size of pte page. To support THP,
later patches will be changing PTRS_PER_PTE value.
Acked-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
diff --git a/arch/powerpc/include/asm/pgtable.h b/arch/powerpc/include/asm/pgtable.h
index a9cbd3b..4b52726 100644
--- a/arch/powerpc/include/asm/pgtable.h
+++ b/arch/powerpc/include/asm/pgtable.h
@@ -17,6 +17,12 @@
# include <asm/pgtable-ppc32.h>
#endif
+/*
+ * We save the slot number & secondary bit in the second half of the
+ * PTE page. We use the 8 bytes per each pte entry.
+ */
+#define PTE_PAGE_HIDX_OFFSET (PTRS_PER_PTE * 8)
+
#ifndef __ASSEMBLY__
#include <asm/tlbflush.h>