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authorWei Yang <weiyang@linux.vnet.ibm.com>2015-09-04 15:47:38 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2015-09-04 16:54:41 -0700
commitc0a294988322a804901fe24222027fe8a34defcb (patch)
tree19ba1165faa4f8c5892c65cb0efb3e497c2205da /mm/memblock.c
parentc7e1e3ccfbd153c890240a391f258efaedfa94d0 (diff)
downloadop-kernel-dev-c0a294988322a804901fe24222027fe8a34defcb.zip
op-kernel-dev-c0a294988322a804901fe24222027fe8a34defcb.tar.gz
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 <weiyang@linux.vnet.ibm.com> Acked-by: David Rientjes <rientjes@google.com> Cc: Tejun Heo <tj@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/memblock.c')
-rw-r--r--mm/memblock.c3
1 files changed, 3 insertions, 0 deletions
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,
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