1 files changed, 12 insertions, 0 deletions
diff --git a/mm/damon/tests/core-kunit.h b/mm/damon/tests/core-kunit.h
index ae03df71737e..cf22e09a3507 100644
--- a/mm/damon/tests/core-kunit.h
+++ b/mm/damon/tests/core-kunit.h
@@ -320,6 +320,18 @@ static void damon_test_nr_accesses_to_accesses_bp(struct kunit *test)
 		.aggr_interval = ((unsigned long)UINT_MAX + 1) * 10
 	};
 
+	/*
+	 * In some cases such as 32bit architectures where UINT_MAX is
+	 * ULONG_MAX, attrs.aggr_interval becomes zero.  Calling
+	 * damon_nr_accesses_to_accesses_bp() in the case will cause
+	 * divide-by-zero.  Such case is prohibited in normal execution since
+	 * the caution is documented on the comment for the function, and
+	 * damon_update_monitoring_results() does the check.  Skip the test in
+	 * the case.
+	 */
+	if (!attrs.aggr_interval)
+		kunit_skip(test, "aggr_interval is zero.");
+
 	KUNIT_EXPECT_EQ(test, damon_nr_accesses_to_accesses_bp(123, &attrs), 0);
 }