selftests/futex: Migrate robust_list to harness

Migrate robust_list test to the kselftest harness framework, removing mixed
legacy ksft_* API usages and passing test metadata to cloned child
functions via child_args struct.

Also, fix an out-of-bounds waitpid bug during multithreaded tests.

[ 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/20260601065126.3623867-8-wakel@google.com
This commit is contained in:
Wake Liu 2026-06-01 06:51:26 +00:00 • committed by Thomas Gleixner
commit 553bd67a90