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-rw-r--r--include/linux/mm.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 2e7ec3ee34cf..1983e08f5906 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -1067,6 +1067,7 @@ vm_fault_t finish_mkwrite_fault(struct vm_fault *vmf);
static inline enum zone_type page_zonenum(const struct page *page)
{
+ ASSERT_EXCLUSIVE_BITS(page->flags, ZONES_MASK << ZONES_PGSHIFT);
return (page->flags >> ZONES_PGSHIFT) & ZONES_MASK;
}