linux-kernel - [PATCH v1 4/5] lib/cpumask

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Date:   Tue,  9 Aug 2022 20:08:54 +0200
From:   Sander Vanheule <sander@...nheule.net>
To:     Yury Norov <yury.norov@...il.com>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Rasmus Villemoes <linux@...musvillemoes.dk>
Cc:     linux-kernel@...r.kernel.org,
        Maíra Canal <mairacanal@...eup.net>,
        David Gow <davidgow@...gle.com>,
        Sander Vanheule <sander@...nheule.net>
Subject: [PATCH v1 4/5] lib/cpumask_kunit: log mask contents

For extra context, log the contents of the masks under test.  This
should help with finding out why a certain test fails.

Link: https://lore.kernel.org/lkml/CABVgOSkPXBc-PWk1zBZRQ_Tt+Sz1ruFHBj3ixojymZF=Vi4tpQ@mail.gmail.com/
Suggested-by: David Gow <davidgow@...gle.com>
Signed-off-by: Sander Vanheule <sander@...nheule.net>
---
 lib/cpumask_kunit.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/lib/cpumask_kunit.c b/lib/cpumask_kunit.c
index 4d353614d853..0f8059a5e93b 100644
--- a/lib/cpumask_kunit.c
+++ b/lib/cpumask_kunit.c
@@ -51,6 +51,10 @@
 static cpumask_t mask_empty;
 static cpumask_t mask_all;
 
+#define STR_MASK(m)			#m
+#define TEST_CPUMASK_PRINT(test, mask)	\
+	kunit_info(test, "%s = '%*pbl'\n", STR_MASK(mask), nr_cpumask_bits, cpumask_bits(mask))
+
 static void test_cpumask_weight(struct kunit *test)
 {
 	KUNIT_EXPECT_TRUE(test, cpumask_empty(&mask_empty));
@@ -103,6 +107,9 @@ static void test_cpumask_iterators_builtin(struct kunit *test)
 	/* Ensure the dynamic masks are stable while running the tests */
 	cpu_hotplug_disable();
 
+	TEST_CPUMASK_PRINT(test, cpu_online_mask);
+	TEST_CPUMASK_PRINT(test, cpu_present_mask);
+
 	EXPECT_FOR_EACH_CPU_BUILTIN_EQ(test, online);
 	EXPECT_FOR_EACH_CPU_BUILTIN_EQ(test, present);
 
@@ -114,6 +121,9 @@ static int test_cpumask_init(struct kunit *test)
 	cpumask_clear(&mask_empty);
 	cpumask_setall(&mask_all);
 
+	TEST_CPUMASK_PRINT(test, &mask_all);
+	TEST_CPUMASK_PRINT(test, cpu_possible_mask);
+
 	return 0;
 }
 
-- 
2.37.1