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authorWei Yang <weiyang@linux.vnet.ibm.com>2015-09-08 21:59:53 (GMT)
committerLinus Torvalds <torvalds@linux-foundation.org>2015-09-08 22:35:28 (GMT)
commit4fcab5f437c481e51c270a2d12ef56a3f2367371 (patch)
tree7d42710ebc76a2c7525676409665519aef897525 /mm/memblock.c
parent7f3eb55bfad8a6dfd880559210f5b21737d69815 (diff)
downloadlinux-4fcab5f437c481e51c270a2d12ef56a3f2367371.tar.xz
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>
Diffstat (limited to 'mm/memblock.c')
-rw-r--r--mm/memblock.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/mm/memblock.c b/mm/memblock.c
index 95ce68c..bde61e8 100644
--- a/mm/memblock.c
+++ b/mm/memblock.c
@@ -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,