memblock: Fix memblock_is_region_reserved() to return a boolean

All callers expect a boolean result which is true if the region
overlaps a reserved region. However, the implementation actually
returns -1 if there is no overlap, and a region index (0 based)
if there is.

Make it behave as callers (and common sense) expect.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

diff --git a/mm/memblock.c b/mm/memblock.c
index 3024eb3..43840b3 100644 (file)
--- a/mm/memblock.c
+++ b/mm/memblock.c
@@ -504,7 +504,7 @@ int __init memblock_is_reserved(u64 addr)
 
 int memblock_is_region_reserved(u64 base, u64 size)
 {
-       return memblock_overlaps_region(&memblock.reserved, base, size);
+       return memblock_overlaps_region(&memblock.reserved, base, size) >= 0;
 }
 
 /*