linux-kernel - [PATCH v4 8/8] test_bits: add tests for fixed-type BIT

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Message-Id: <20250305-fixed-type-genmasks-v4-8-1873dcdf6723@wanadoo.fr>
Date: Wed, 05 Mar 2025 22:00:20 +0900
From: Vincent Mailhol via B4 Relay <devnull+mailhol.vincent.wanadoo.fr@...nel.org>
To: Yury Norov <yury.norov@...il.com>, 
 Lucas De Marchi <lucas.demarchi@...el.com>, 
 Rasmus Villemoes <linux@...musvillemoes.dk>, 
 Jani Nikula <jani.nikula@...ux.intel.com>, 
 Joonas Lahtinen <joonas.lahtinen@...ux.intel.com>, 
 Rodrigo Vivi <rodrigo.vivi@...el.com>, 
 Tvrtko Ursulin <tursulin@...ulin.net>, David Airlie <airlied@...il.com>, 
 Simona Vetter <simona@...ll.ch>, Andrew Morton <akpm@...ux-foundation.org>
Cc: linux-kernel@...r.kernel.org, intel-gfx@...ts.freedesktop.org, 
 dri-devel@...ts.freedesktop.org, Andi Shyti <andi.shyti@...ux.intel.com>, 
 David Laight <David.Laight@...LAB.COM>, 
 Dmitry Baryshkov <dmitry.baryshkov@...aro.org>, 
 Andy Shevchenko <andriy.shevchenko@...ux.intel.com>, 
 Vincent Mailhol <mailhol.vincent@...adoo.fr>
Subject: [PATCH v4 8/8] test_bits: add tests for fixed-type BIT

From: Vincent Mailhol <mailhol.vincent@...adoo.fr>

Add some additional tests in lib/test_bits.c to cover the expected
results of the BIT_U*() macros.

Signed-off-by: Vincent Mailhol <mailhol.vincent@...adoo.fr>
---
 lib/test_bits.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/lib/test_bits.c b/lib/test_bits.c
index c3a40995a2577322252371eb10ada0c33fb5d9b4..641001a04f21bc3b788ae05c6d2eaaba9052e463 100644
--- a/lib/test_bits.c
+++ b/lib/test_bits.c
@@ -9,6 +9,16 @@
 
 #define assert_type(t, x) _Generic(x, t: x, default: 0)
 
+static_assert(assert_type(unsigned int, BIT_U8(0)) == 1u);
+static_assert(assert_type(unsigned int, BIT_U16(0)) == 1u);
+static_assert(assert_type(u32, BIT_U32(0)) == 1u);
+static_assert(assert_type(u64, BIT_U64(0)) == 1ull);
+
+static_assert(assert_type(unsigned int, BIT_U8(7)) == 0x80u);
+static_assert(assert_type(unsigned int, BIT_U16(15)) == 0x8000u);
+static_assert(assert_type(u32, BIT_U32(31)) == 0x80000000u);
+static_assert(assert_type(u64, BIT_U64(63)) == 0x8000000000000000ull);
+
 static_assert(assert_type(unsigned long, GENMASK(31, 0)) == U32_MAX);
 static_assert(assert_type(unsigned long long, GENMASK_ULL(63, 0)) == U64_MAX);
 static_assert(assert_type(unsigned int, GENMASK_U8(7, 0)) == U8_MAX);

-- 
2.45.3