memblock: Kill MEMBLOCK_ERROR

25818f0f28 (memblock: Make MEMBLOCK_ERROR be 0) thankfully made
MEMBLOCK_ERROR 0 and there already are codes which expect error return
to be 0.  There's no point in keeping MEMBLOCK_ERROR around.  End its
misery.

Signed-off-by: Tejun Heo <tj@kernel.org>
Link: http://lkml.kernel.org/r/1310457490-3356-6-git-send-email-tj@kernel.org
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
diff --git a/arch/x86/mm/memblock.c b/arch/x86/mm/memblock.c
index 992da5e..e126117 100644
--- a/arch/x86/mm/memblock.c
+++ b/arch/x86/mm/memblock.c
@@ -66,7 +66,7 @@
 			return addr;
 	}
 
-	return MEMBLOCK_ERROR;
+	return 0;
 }
 
 static __init struct range *find_range_array(int count)
@@ -78,7 +78,7 @@
 	end = memblock.current_limit;
 
 	mem = memblock_find_in_range(0, end, size, sizeof(struct range));
-	if (mem == MEMBLOCK_ERROR)
+	if (!mem)
 		panic("can not find more space for range array");
 
 	/*
@@ -274,7 +274,7 @@
 {
 	u64 addr;
 	addr = find_memory_core_early(nid, size, align, start, end);
-	if (addr != MEMBLOCK_ERROR)
+	if (addr)
 		return addr;
 
 	/* Fallback, should already have start end within node range */