diff --git a/mm/percpu.c b/mm/percpu.c
index c7206d0..202e104 100644
--- a/mm/percpu.c
+++ b/mm/percpu.c
@@ -713,11 +713,14 @@
 
 	/*
 	 * We want the lowest bit of offset available for in-use/free
-	 * indicator.
+	 * indicator, so force >= 16bit alignment and make size even.
 	 */
 	if (unlikely(align < 2))
 		align = 2;
 
+	if (unlikely(size & 1))
+		size++;
+
 	if (unlikely(!size || size > PCPU_MIN_UNIT_SIZE || align > PAGE_SIZE)) {
 		WARN(true, "illegal size (%zu) or align (%zu) for "
 		     "percpu allocation\n", size, align);