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Merge tag 'bitmap-for-6.17' of https://github.com/norov/linux

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Pull bitmap updates from Yury Norov:

 - find_random_bit() series (Yury)

 - GENMASK() consolidation (Vincent)

 - random cleanups (Shaopeng, Ben, Yury)

* tag 'bitmap-for-6.17' of https://github.com/norov/linux:
  bitfield: Ensure the return values of helper functions are checked
  test_bits: add tests for __GENMASK() and __GENMASK_ULL()
  bits: unify the non-asm GENMASK*()
  bits: split the definition of the asm and non-asm GENMASK*()
  cpumask: Remove unnecessary cpumask_nth_andnot()
  watchdog: fix opencoded cpumask_next_wrap() in watchdog_next_cpu()
  clocksource: Improve randomness in clocksource_verify_choose_cpus()
  cpumask: introduce cpumask_random()
  bitmap: generalize node_random()
This commit is contained in:
Linus Torvalds
2025-07-31 16:52:32 -07:00
parent 6a68cec16b e2b02d382a
commit f2d282e1df
9 changed files with 71 additions and 92 deletions
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19
lib/tests/test_bits.c
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@@ -26,6 +26,23 @@ 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);
/* FIXME: add a test case written in asm for GENMASK() and GENMASK_ULL() */
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));
}
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));
}
static void genmask_test(struct kunit *test)
{
@@ -123,6 +140,8 @@ static void genmask_input_check_test(struct kunit *test)
static struct kunit_case bits_test_cases[] = {
KUNIT_CASE(__genmask_test),
KUNIT_CASE(__genmask_ull_test),
KUNIT_CASE(genmask_test),
KUNIT_CASE(genmask_ull_test),
KUNIT_CASE(genmask_u128_test),