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mm/memblock.c: WARN_ON when flags differs from overlap region

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Each memblock_region has flags to indicates the type 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 flags of the new range differs from the overlapped region, the
information recorded is not correct.

This patch adds a WARN_ON when the flags of the new range differs from the
overlapped region.

Signed-off-by: Wei Yang <weiyang@linux.vnet.ibm.com>
Cc: David Rientjes <rientjes@google.com>
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 2015-09-08 14:59:53 -07:00 committed by Linus Torvalds
parent 7f3eb55bfa
commit 4fcab5f437
1 changed files with 1 additions and 0 deletions
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mm/memblock.c
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@ -569,6 +569,7 @@ int __init_memblock memblock_add_range(struct memblock_type *type,
#ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
WARN_ON(nid != memblock_get_region_node(rgn));
#endif
WARN_ON(flags != rgn->flags);
nr_new++;
if (insert)
memblock_insert_region(type, i++, base,