From nobody Sun Feb 8 16:05:07 2026 Received: from mailtransmit05.runbox.com (mailtransmit05.runbox.com [185.226.149.38]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D3C714A33F9; Wed, 21 Jan 2026 14:58:17 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=185.226.149.38 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769007500; cv=none; b=OwPsyxPnFjw7MnCHBFMdg5HQm/frv5aPFAlAM5130uufB0470xWrZSG3ezl0yDnPF7+bnG8KmYNfP3pKmkOm+e12LR2KmymvQax4P9DNe2XA6xfvv4OEVzF8ZVijDMkZytH6+k35JKk4Zsx9Fng3SMyfpwaykx1c3VEB5ucX3Rg= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769007500; c=relaxed/simple; bh=GrU5G25/P99RLLNQ7KSbxlvGQaNMjUwXFB4EvQMlbdY=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=hCYJpqQPjVrjMy5ESACaFoxEOzan6HX3ByEnM1C3rSgf8O9hIIrfpWd7OGSc9CdEzQ88IGVRREzG4XpAidgx5Xw0p8v2bHE3WxnBanGYrforWa8QT+5XQaouMBdOeRo2MLs5R2EPbYh/L9sMOeGnUdze+i6WygLLGMrBW5Ni8Q4= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=runbox.com; dkim=pass (2048-bit key) header.d=runbox.com header.i=@runbox.com header.b=mumsnJE3; arc=none smtp.client-ip=185.226.149.38 Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=runbox.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=runbox.com header.i=@runbox.com header.b="mumsnJE3" Received: from mailtransmit02.runbox ([10.9.9.162] helo=aibo.runbox.com) by mailtransmit05.runbox.com with esmtps (TLS1.2) tls TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 (Exim 4.93) (envelope-from ) id 1viZet-008Pjm-DL; Wed, 21 Jan 2026 15:58:11 +0100 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=runbox.com; s=selector2; h=Content-Transfer-Encoding:MIME-Version:References:In-Reply-To :Message-Id:Date:Subject:Cc:To:From; bh=IMLT+9LEWzpcaNrLe+KYWU3xSE5AFfmLcg7xui5sLPw=; b=mumsnJE3uG328eoTonga0q7XW6 YfxKMj4TyOcRNmcEom1hQhXoXBkDtQJu67uXD+e6W/e3KOT/1MalE7MCaGuQK/8u/AEkbuxda2HHT LZfVxqkJIlusPga7K1VSy/+CuaFF+ZiA4GfpPYtAgnVNcCG9/WEZ5yGVRzcgdyaG6rY+G1wK2Jf7w 78dhBKJBBpTGGbdUyGJ3tfUzOdyJDMtcXt5+N6AMhNCsqGPBSIN7Pn76W+JivjdCDplOkc11JweDB NbWmJf6JRbCnVRg0slt8LFoU+ehGPwqntj1KNg+urxtMk28oyxwHFvC3eK+dCu+jr+BNAK5xm0nC/ 3m/rHDYg==; Received: from [10.9.9.72] (helo=submission01.runbox) by mailtransmit02.runbox with esmtp (Exim 4.86_2) (envelope-from ) id 1viZes-0001sq-Lm; Wed, 21 Jan 2026 15:58:11 +0100 Received: by submission01.runbox with esmtpsa [Authenticated ID (1493616)] (TLS1.2:ECDHE_SECP256R1__RSA_PSS_RSAE_SHA256__AES_256_GCM:256) (Exim 4.93) id 1viZeZ-00GH6h-QD; Wed, 21 Jan 2026 15:57:51 +0100 From: david.laight.linux@gmail.com To: Nathan Chancellor , Greg Kroah-Hartman , Thomas Gleixner , Peter Zijlstra , Ingo Molnar , Mathieu Desnoyers , Arnd Bergmann , linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org, Yury Norov , Lucas De Marchi , Jani Nikula , Vincent Mailhol , Andy Shevchenko , Kees Cook , Andrew Morton Cc: David Laight Subject: [PATCH next 13/14] test_bits: Change all the tests to be compile-time tests Date: Wed, 21 Jan 2026 14:57:30 +0000 Message-Id: <20260121145731.3623-14-david.laight.linux@gmail.com> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20260121145731.3623-1-david.laight.linux@gmail.com> References: <20260121145731.3623-1-david.laight.linux@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: David Laight Since all the GENMASK() values are compile-time constants they can be tested with BUILD_BUG_ON() rather than KUNIT_EXPECT_EQ(). Signed-off-by: David Laight --- lib/tests/test_bits.c | 90 +++++++++++++++++++++---------------------- 1 file changed, 45 insertions(+), 45 deletions(-) diff --git a/lib/tests/test_bits.c b/lib/tests/test_bits.c index 36eb4661e78b..4d3a895f490c 100644 --- a/lib/tests/test_bits.c +++ b/lib/tests/test_bits.c @@ -32,30 +32,30 @@ static_assert(assert_type(u64, GENMASK_U64(63, 0)) =3D= =3D U64_MAX); =20 static void __genmask_test(struct kunit *test) { - KUNIT_EXPECT_EQ(test, 1ul, __GENMASK(0, 0)); - KUNIT_EXPECT_EQ(test, 3ul, __GENMASK(1, 0)); - KUNIT_EXPECT_EQ(test, 6ul, __GENMASK(2, 1)); - KUNIT_EXPECT_EQ(test, 0xFFFFFFFFul, __GENMASK(31, 0)); + BUILD_BUG_ON(__GENMASK(0, 0) !=3D 1ul); + BUILD_BUG_ON(__GENMASK(1, 0) !=3D 3ul); + BUILD_BUG_ON(__GENMASK(2, 1) !=3D 6ul); + BUILD_BUG_ON(__GENMASK(31, 0) !=3D 0xFFFFFFFFul); } =20 static void __genmask_ull_test(struct kunit *test) { - KUNIT_EXPECT_EQ(test, 1ull, __GENMASK_ULL(0, 0)); - KUNIT_EXPECT_EQ(test, 3ull, __GENMASK_ULL(1, 0)); - KUNIT_EXPECT_EQ(test, 0x000000ffffe00000ull, __GENMASK_ULL(39, 21)); - KUNIT_EXPECT_EQ(test, 0xffffffffffffffffull, __GENMASK_ULL(63, 0)); + BUILD_BUG_ON(__GENMASK_ULL(0, 0) !=3D 1ull); + BUILD_BUG_ON(__GENMASK_ULL(1, 0) !=3D 3ull); + BUILD_BUG_ON(__GENMASK_ULL(39, 21) !=3D 0x000000ffffe00000ull); + BUILD_BUG_ON(__GENMASK_ULL(63, 0) !=3D 0xffffffffffffffffull); } =20 static void genmask_test(struct kunit *test) { - KUNIT_EXPECT_EQ(test, 1ul, GENMASK(0, 0)); - KUNIT_EXPECT_EQ(test, 3ul, GENMASK(1, 0)); - KUNIT_EXPECT_EQ(test, 6ul, GENMASK(2, 1)); - KUNIT_EXPECT_EQ(test, 0xFFFFFFFFul, GENMASK(31, 0)); + BUILD_BUG_ON(GENMASK(0, 0) !=3D 1ul); + BUILD_BUG_ON(GENMASK(1, 0) !=3D 3ul); + BUILD_BUG_ON(GENMASK(2, 1) !=3D 6ul); + BUILD_BUG_ON(GENMASK(31, 0) !=3D 0xFFFFFFFFul); =20 - KUNIT_EXPECT_EQ(test, 1u, GENMASK_U8(0, 0)); - KUNIT_EXPECT_EQ(test, 3u, GENMASK_U16(1, 0)); - KUNIT_EXPECT_EQ(test, 0x10000, GENMASK_U32(16, 16)); + BUILD_BUG_ON(GENMASK_U8(0, 0) !=3D 1u); + BUILD_BUG_ON(GENMASK_U16(1, 0) !=3D 3u); + BUILD_BUG_ON(GENMASK_U32(16, 16) !=3D 0x10000); =20 #ifdef TEST_GENMASK_FAILURES /* these should fail compilation */ @@ -75,10 +75,10 @@ static void genmask_test(struct kunit *test) =20 static void genmask_ull_test(struct kunit *test) { - KUNIT_EXPECT_EQ(test, 1ull, GENMASK_ULL(0, 0)); - KUNIT_EXPECT_EQ(test, 3ull, GENMASK_ULL(1, 0)); - KUNIT_EXPECT_EQ(test, 0x000000ffffe00000ull, GENMASK_ULL(39, 21)); - KUNIT_EXPECT_EQ(test, 0xffffffffffffffffull, GENMASK_ULL(63, 0)); + BUILD_BUG_ON(GENMASK_ULL(0, 0) !=3D 1ull); + BUILD_BUG_ON(GENMASK_ULL(1, 0) !=3D 3ull); + BUILD_BUG_ON(GENMASK_ULL(39, 21) !=3D 0x000000ffffe00000ull); + BUILD_BUG_ON(GENMASK_ULL(63, 0) !=3D 0xffffffffffffffffull); =20 #ifdef TEST_GENMASK_FAILURES /* these should fail compilation */ @@ -92,23 +92,23 @@ static void genmask_u128_test(struct kunit *test) { #ifdef CONFIG_ARCH_SUPPORTS_INT128 /* Below 64 bit masks */ - KUNIT_EXPECT_EQ(test, 0x0000000000000001ull, GENMASK_U128(0, 0)); - KUNIT_EXPECT_EQ(test, 0x0000000000000003ull, GENMASK_U128(1, 0)); - KUNIT_EXPECT_EQ(test, 0x0000000000000006ull, GENMASK_U128(2, 1)); - KUNIT_EXPECT_EQ(test, 0x00000000ffffffffull, GENMASK_U128(31, 0)); - KUNIT_EXPECT_EQ(test, 0x000000ffffe00000ull, GENMASK_U128(39, 21)); - KUNIT_EXPECT_EQ(test, 0xffffffffffffffffull, GENMASK_U128(63, 0)); + BUILD_BUG_ON(GENMASK_U128(0, 0) !=3D 0x0000000000000001ull); + BUILD_BUG_ON(GENMASK_U128(1, 0) !=3D 0x0000000000000003ull); + BUILD_BUG_ON(GENMASK_U128(2, 1) !=3D 0x0000000000000006ull); + BUILD_BUG_ON(GENMASK_U128(31, 0) !=3D 0x00000000ffffffffull); + BUILD_BUG_ON(GENMASK_U128(39, 21) !=3D 0x000000ffffe00000ull); + BUILD_BUG_ON(GENMASK_U128(63, 0) !=3D 0xffffffffffffffffull); =20 /* Above 64 bit masks - only 64 bit portion can be validated once */ - KUNIT_EXPECT_EQ(test, 0xffffffffffffffffull, GENMASK_U128(64, 0) >> 1); - KUNIT_EXPECT_EQ(test, 0x00000000ffffffffull, GENMASK_U128(81, 50) >> 50); - KUNIT_EXPECT_EQ(test, 0x0000000000ffffffull, GENMASK_U128(87, 64) >> 64); - KUNIT_EXPECT_EQ(test, 0x0000000000ff0000ull, GENMASK_U128(87, 80) >> 64); - - KUNIT_EXPECT_EQ(test, 0xffffffffffffffffull, GENMASK_U128(127, 0) >> 64); - KUNIT_EXPECT_EQ(test, 0xffffffffffffffffull, (u64)GENMASK_U128(127, 0)); - KUNIT_EXPECT_EQ(test, 0x0000000000000003ull, GENMASK_U128(127, 126) >> 12= 6); - KUNIT_EXPECT_EQ(test, 0x0000000000000001ull, GENMASK_U128(127, 127) >> 12= 7); + BUILD_BUG_ON(GENMASK_U128(64, 0) >> 1 !=3D 0xffffffffffffffffull); + BUILD_BUG_ON(GENMASK_U128(81, 50) >> 50 !=3D 0x00000000ffffffffull); + BUILD_BUG_ON(GENMASK_U128(87, 64) >> 64 !=3D 0x0000000000ffffffull); + BUILD_BUG_ON(GENMASK_U128(87, 80) >> 64 !=3D 0x0000000000ff0000ull); + + BUILD_BUG_ON(GENMASK_U128(127, 0) >> 64 !=3D 0xffffffffffffffffull); + BUILD_BUG_ON((u64)GENMASK_U128(127, 0) !=3D 0xffffffffffffffffull); + BUILD_BUG_ON(GENMASK_U128(127, 126) >> 126 !=3D 0x0000000000000003ull); + BUILD_BUG_ON(GENMASK_U128(127, 127) >> 127 !=3D 0x0000000000000001ull); #ifdef TEST_GENMASK_FAILURES /* these should fail compilation */ GENMASK_U128(0, 1); @@ -129,21 +129,21 @@ static void genmask_input_check_test(struct kunit *te= st) OPTIMIZER_HIDE_VAR(w); =20 /* Unknown input */ - KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(x, 0, 32)); - KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(0, x, 32)); - KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(x, y, 32)); + BUILD_BUG_ON(GENMASK_INPUT_CHECK(x, 0, 32) !=3D 0); + BUILD_BUG_ON(GENMASK_INPUT_CHECK(0, x, 32) !=3D 0); + BUILD_BUG_ON(GENMASK_INPUT_CHECK(x, y, 32) !=3D 0); =20 - KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(z, 0, 32)); - KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(0, z, 32)); - KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(z, w, 32)); + BUILD_BUG_ON(GENMASK_INPUT_CHECK(z, 0, 32) !=3D 0); + BUILD_BUG_ON(GENMASK_INPUT_CHECK(0, z, 32) !=3D 0); + BUILD_BUG_ON(GENMASK_INPUT_CHECK(z, w, 32) !=3D 0); =20 /* Valid input */ - KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(1, 1, 32)); - KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(39, 21, 64)); + BUILD_BUG_ON(GENMASK_INPUT_CHECK(1, 1, 32) !=3D 0); + BUILD_BUG_ON(GENMASK_INPUT_CHECK(39, 21, 64) !=3D 0); =20 - KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(100, 80, 128)); - KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(110, 65, 128)); - KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(127, 0, 128)); + BUILD_BUG_ON(GENMASK_INPUT_CHECK(100, 80, 128) !=3D 0); + BUILD_BUG_ON(GENMASK_INPUT_CHECK(110, 65, 128) !=3D 0); + BUILD_BUG_ON(GENMASK_INPUT_CHECK(127, 0, 128) !=3D 0); } =20 =20 --=20 2.39.5