powerpc/mm: Make some of the PGTABLE_RANGE dependency explicit
slice array size and slice mask size depend on PGTABLE_RANGE.
Reviewed-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/mm/slice.c b/arch/powerpc/mm/slice.c
index b4e996a..5829d2a 100644
--- a/arch/powerpc/mm/slice.c
+++ b/arch/powerpc/mm/slice.c
@@ -34,6 +34,11 @@
#include <asm/mmu.h>
#include <asm/spu.h>
+/* some sanity checks */
+#if (PGTABLE_RANGE >> 43) > SLICE_MASK_SIZE
+#error PGTABLE_RANGE exceeds slice_mask high_slices size
+#endif
+
static DEFINE_SPINLOCK(slice_convert_lock);