mm/memblock.c:memblock_add_range(): if nr_new is 0 just return

If nr_new is 0 which means there's no region would be added, so just return to the caller. Signed-off-by: nimisolo <[email protected]> Cc: Alexander Kuleshov <[email protected]> Cc: Pekka Enberg <[email protected]> Cc: Tony Luck <[email protected]> Cc: Mel Gorman <[email protected]> Cc: Tang Chen <[email protected]> Cc: Wei Yang <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
olifre · Jul 26, 2016 · ef3cc4d · ef3cc4d
1 parent 8a5c743
commit ef3cc4d
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/mm/memblock.c b/mm/memblock.c
@@ -584,6 +584,9 @@ int __init_memblock memblock_add_range(struct memblock_type *type,
 					       nid, flags);
 	}
 
+	if (!nr_new)
+		return 0;
+
 	/*
 	 * If this was the first round, resize array and repeat for actual
 	 * insertions; otherwise, merge and return.