selftests/futex: Migrate futex_wait_private_mapped_file to harness

Migrate futex_wait_private_mapped_file test to the kselftest harness
framework, removing mixed legacy ksft_* API usages and passing test
metadata to helper thread.

[ tglx: Fixup coding style ]

Signed-off-by: Wake Liu <wakel@google.com>
Signed-off-by: Thomas Gleixner <tglx@kernel.org>
Link: https://patch.msgid.link/20260525092002.3762888-3-wakel@google.com
This commit is contained in:
Wake Liu 2026-05-25 09:20:01 +00:00 • committed by Thomas Gleixner
commit dccef66d85