Commit 4fcab5f4 authored Sep 08, 2015 by Wei Yang Committed by Linus Torvalds Sep 08, 2015

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



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>

parent 7f3eb55b

mm/memblock.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -569,6 +569,7 @@ repeat:
		#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,

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