[merged] lib-test_bitsc-add-tests-for-genmask_u128.patch removed from -mm tree

[merged] lib-test_bitsc-add-tests-for-genmask_u128.patch removed from -mm tree

[Andrew Morton]

The quilt patch titled
     Subject: lib/test_bits.c: add tests for GENMASK_U128()
has been removed from the -mm tree.  Its filename was
     lib-test_bitsc-add-tests-for-genmask_u128.patch

This patch was dropped because it was merged into mainline or a subsystem tree

------------------------------------------------------
From: Anshuman Khandual <anshuman.khandual@arm.com>
Subject: lib/test_bits.c: add tests for GENMASK_U128()
Date: Thu, 25 Jul 2024 11:18:08 +0530

This adds GENMASK_U128() tests although currently only 64 bit wide masks
are being tested.

Link: https://lkml.kernel.org/r/20240725054808.286708-3-anshuman.khandual@arm.com
Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Yury Norov <yury.norov@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 lib/test_bits.c |   25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

--- a/lib/test_bits.c~lib-test_bitsc-add-tests-for-genmask_u128
+++ a/lib/test_bits.c
@@ -39,6 +39,26 @@ static void genmask_ull_test(struct kuni
 #endif
 }
 
+#ifdef CONFIG_ARCH_SUPPORTS_INT128
+static void genmask_u128_test(struct kunit *test)
+{
+	/* Tests mask generation only when the mask width is within 64 bits */
+	KUNIT_EXPECT_EQ(test, 0x0000000000ff0000ULL, GENMASK_U128(87, 80) >> 64);
+	KUNIT_EXPECT_EQ(test, 0x0000000000ffffffULL, GENMASK_U128(87, 64) >> 64);
+	KUNIT_EXPECT_EQ(test, 0x0000000000000001ULL, GENMASK_U128(0, 0));
+	KUNIT_EXPECT_EQ(test, 0xffffffffffffffffULL, GENMASK_U128(63, 0));
+	KUNIT_EXPECT_EQ(test, 0xffffffffffffffffULL, GENMASK_U128(64, 0) >> 1);
+	KUNIT_EXPECT_EQ(test, 0x00000000ffffffffULL, GENMASK_U128(81, 50) >> 50);
+
+#ifdef TEST_GENMASK_FAILURES
+	/* these should fail compilation */
+	GENMASK_U128(0, 1);
+	GENMASK_U128(0, 10);
+	GENMASK_U128(9, 10);
+#endif
+}
+#endif
+
 static void genmask_input_check_test(struct kunit *test)
 {
 	unsigned int x, y;
@@ -56,12 +76,17 @@ static void genmask_input_check_test(str
 	/* Valid input */
 	KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(1, 1));
 	KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(39, 21));
+	KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(100, 80));
+	KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(110, 65));
 }
 
 
 static struct kunit_case bits_test_cases[] = {
 	KUNIT_CASE(genmask_test),
 	KUNIT_CASE(genmask_ull_test),
+#ifdef CONFIG_ARCH_SUPPORTS_INT128
+	KUNIT_CASE(genmask_u128_test),
+#endif
 	KUNIT_CASE(genmask_input_check_test),
 	{}
 };
_

Patches currently in -mm which might be from anshuman.khandual@arm.com are