From c0a294988322a804901fe24222027fe8a34defcb Mon Sep 17 00:00:00 2001 From: Wei Yang Date: Fri, 4 Sep 2015 15:47:38 -0700 Subject: [PATCH] mm/memblock: WARN_ON when nid differs from overlap region Each memblock_region has nid to indicates the Node ID of this range. For the overlap case, memblock_add_range() inserts the lower part and leave the upper part as indicated in the overlapped region. If the nid of the new range differs from the overlapped region, the information recorded is not correct. This patch adds a WARN_ON when the nid of the new range differs from the overlapped region. Signed-off-by: Wei Yang Acked-by: David Rientjes Cc: Tejun Heo Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- mm/memblock.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/mm/memblock.c b/mm/memblock.c index 87108e7..95ce68c 100644 --- a/mm/memblock.c +++ b/mm/memblock.c @@ -566,6 +566,9 @@ repeat: * area, insert that portion. */ if (rbase > base) { +#ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP + WARN_ON(nid != memblock_get_region_node(rgn)); +#endif nr_new++; if (insert) memblock_insert_region(type, i++, base, -- 2.7.4