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mm/memblock: WARN_ON when nid differs from overlap region

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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>
This commit is contained in:
Wei Yang 2015-09-04 15:47:38 -07:00 committed by Linus Torvalds
parent c7e1e3ccfb
commit c0a2949883
1 changed files with 3 additions and 0 deletions
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mm/memblock.c
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@ -566,6 +566,9 @@ int __init_memblock memblock_add_range(struct memblock_type *type,
* 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,