memblock: Make MEMBLOCK_ERROR be 0
And ensure we don't hand out 0 as a valid allocation. We put the
low limit at PAGE_SIZE arbitrarily.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
diff --git a/include/linux/memblock.h b/include/linux/memblock.h
index 1a9c29c..dfa6449 100644
--- a/include/linux/memblock.h
+++ b/include/linux/memblock.h
@@ -19,7 +19,7 @@
#include <asm/memblock.h>
#define INIT_MEMBLOCK_REGIONS 128
-#define MEMBLOCK_ERROR (~(phys_addr_t)0)
+#define MEMBLOCK_ERROR 0
struct memblock_region {
phys_addr_t base;