lib: checksum: use ARRAY_SIZE() to improve assert_setup_correct()

Use ARRAY_SIZE() to simplify the assert_setup_correct() function and
improve its readability.

Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Thorsten Blum <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>

Author: toblux

lib/checksum_kunit.c

@@ -468,12 +468,9 @@ static __wsum to_wsum(u32 x)
 
 static void assert_setup_correct(struct kunit *test)
 {
-	CHECK_EQ(sizeof(random_buf) / sizeof(random_buf[0]), MAX_LEN);
-	CHECK_EQ(sizeof(expected_results) / sizeof(expected_results[0]),
-		 MAX_LEN);
-	CHECK_EQ(sizeof(init_sums_no_overflow) /
-			 sizeof(init_sums_no_overflow[0]),
-		 MAX_LEN);
+	CHECK_EQ(ARRAY_SIZE(random_buf), MAX_LEN);
+	CHECK_EQ(ARRAY_SIZE(expected_results), MAX_LEN);
+	CHECK_EQ(ARRAY_SIZE(init_sums_no_overflow), MAX_LEN);
 }
 
 /*