powerpc/mm: Fix typo in PTRS_PER_PUD

PTRS_PER_PUD should be based on PUD_INDEX_SIZE, not PMD_INDEX_SIZE.  We
got away with it because PUD and PMD had the same index size, but this is
no longer true with Aneesh's patchset to support a 46-bit user effective
address space.

Signed-off-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

diff --git a/arch/powerpc/include/asm/pgtable-ppc64-4k.h b/arch/powerpc/include/asm/pgtable-ppc64-4k.h
index 6eefdcf..d6489a2 100644 (file)
--- a/arch/powerpc/include/asm/pgtable-ppc64-4k.h
+++ b/arch/powerpc/include/asm/pgtable-ppc64-4k.h
@@ -19,7 +19,7 @@
 
 #define PTRS_PER_PTE   (1 << PTE_INDEX_SIZE)
 #define PTRS_PER_PMD   (1 << PMD_INDEX_SIZE)
-#define PTRS_PER_PUD   (1 << PMD_INDEX_SIZE)
+#define PTRS_PER_PUD   (1 << PUD_INDEX_SIZE)
 #define PTRS_PER_PGD   (1 << PGD_INDEX_SIZE)
 
 /* PMD_SHIFT determines what a second-level page table entry can map */