lib/tests: extend KUnit test for bitops with more cases

Extend a KUnit test suite for the bitops API to cover more APIs from
include/asm-generic/bitops/instrumented-atomic.h.

- change_bit()
- test_and_set_bit()
- test_and_clear_bit()
- test_and_change_bit()

Verified on x86_64, i386, and arm64 architectures.

Sample KUnit output:

        KTAP version 1
        # Subtest: test_change_bit
        ok 1 BITOPS_4
        ok 2 BITOPS_7
        ok 3 BITOPS_11
        ok 4 BITOPS_31
        ok 5 BITOPS_88
    # test_change_bit: pass:5 fail:0 skip:0 total:5
    ok 2 test_change_bit
        KTAP version 1
        # Subtest: test_test_and_set_bit_test_and_clear_bit
        ok 1 BITOPS_4
        ok 2 BITOPS_7
        ok 3 BITOPS_11
        ok 4 BITOPS_31
        ok 5 BITOPS_88
    # test_test_and_set_bit_test_and_clear_bit: pass:5 fail:0 skip:0 total:5
    ok 3 test_test_and_set_bit_test_and_clear_bit
        KTAP version 1
        # Subtest: test_test_and_change_bit
        ok 1 BITOPS_4
        ok 2 BITOPS_7
        ok 3 BITOPS_11
        ok 4 BITOPS_31
        ok 5 BITOPS_88
    # test_test_and_change_bit: pass:5 fail:0 skip:0 total:5
    ok 4 test_test_and_change_bit

Signed-off-by: Ryota Sakamoto <sakamo.ryota@gmail.com>
Signed-off-by: Yury Norov <ynorov@nvidia.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index e4f8ba2f9f32..c59b12cf633a 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -2660,8 +2660,8 @@ config BITOPS_KUNIT
 	  This option enables the KUnit test for the bitops library
 	  which provides functions for bit operations.
 
-	  Note that this is a partial copy of the original test_bitops module.
-	  For the full coverage, enable TEST_BITOPS.
+	  Note that this is derived from the original test_bitops module.
+	  For micro-benchmarks and compiler warning checks, enable TEST_BITOPS.
 
 	  If unsure, say N.