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| author |   Linus Torvalds <torvalds@linux-foundation.org> | 2025-06-03 07:39:23 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2025-06-03 07:39:23 -0700 |
| commit | 8b2198f03776c5c25f0cafe0ba5c0c60807b554b (patch) | |
| tree | 99e8d200a04cf96e8fc4e09afffa7ea00529491d /lib | |
| parent | Merge tag 'bootconfig-v6.16' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace (diff) | |
| parent | topology: make for_each_node_with_cpus() O(N) (diff) | |
| download | linux-rng-8b2198f03776c5c25f0cafe0ba5c0c60807b554b.tar.xz linux-rng-8b2198f03776c5c25f0cafe0ba5c0c60807b554b.zip | |
Merge tag 'bitmap-for-6.16-rc1' of https://github.com/norov/linux
Pull bitmap updates from Yury Norov:
- dead code cleanups for cpumasks and nodemasks (me)
- fixed-width flavors of GENMASK() and BIT() (Vincent, Lucas and me)
- FIELD_MODIFY() helper (Luo)
- for_each_node_with_cpus() optimization (me)
- bitmap-str fixes (Andy)
* tag 'bitmap-for-6.16-rc1' of https://github.com/norov/linux:
topology: make for_each_node_with_cpus() O(N)
bitfield: Add FIELD_MODIFY() helper
bitmap-str: Add missing header(s)
bitmap-str: Get rid of 'extern' for function prototypes
build_bug.h: more user friendly error messages in BUILD_BUG_ON_ZERO()
test_bits: add tests for BIT_U*()
test_bits: add tests for GENMASK_U*()
drm/i915: Convert REG_GENMASK*() to fixed-width GENMASK_U*()
bits: introduce fixed-type BIT_U*()
bits: introduce fixed-type GENMASK_U*()
bits: add comments and newlines to #if, #else and #endif directives
cpumask: drop cpumask_assign_cpu()
riscv: switch set_icache_stale_mask() to using non-atomic assign_cpu()
cpumask: add non-atomic __assign_cpu()
nodemask: drop nodes_shift
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/tests/test_bits.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/lib/tests/test_bits.c b/lib/tests/test_bits.c index c7b38d91e1f1..47325b41515f 100644 --- a/lib/tests/test_bits.c +++ b/lib/tests/test_bits.c @@ -5,6 +5,26 @@ #include <kunit/test.h> #include <linux/bits.h> +#include <linux/types.h> + +#define assert_type(t, x) _Generic(x, t: x, default: 0) + +static_assert(assert_type(u8, BIT_U8(0)) == 1u); +static_assert(assert_type(u16, 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(u8, BIT_U8(7)) == 0x80u); +static_assert(assert_type(u16, 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(u8, GENMASK_U8(7, 0)) == U8_MAX); +static_assert(assert_type(u16, GENMASK_U16(15, 0)) == U16_MAX); +static_assert(assert_type(u32, GENMASK_U32(31, 0)) == U32_MAX); +static_assert(assert_type(u64, GENMASK_U64(63, 0)) == U64_MAX); static void genmask_test(struct kunit *test) @@ -14,11 +34,21 @@ static void genmask_test(struct kunit *test) KUNIT_EXPECT_EQ(test, 6ul, GENMASK(2, 1)); KUNIT_EXPECT_EQ(test, 0xFFFFFFFFul, GENMASK(31, 0)); + 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)); + #ifdef TEST_GENMASK_FAILURES /* these should fail compilation */ GENMASK(0, 1); GENMASK(0, 10); GENMASK(9, 10); + + GENMASK_U32(0, 31); + GENMASK_U64(64, 0); + GENMASK_U32(32, 0); + GENMASK_U16(16, 0); + GENMASK_U8(8, 0); #endif |