[ Upstream commitb26c1a85f3] The default SH kunit configuration sets CONFIG_CMDLINE_OVERWRITE which completely disregards the cmdline passed from the bootloader/QEMU in favor of the builtin CONFIG_CMDLINE. However the kunit tool needs to pass arguments to the in-kernel kunit core, for filters and other runtime parameters. Enable CONFIG_CMDLINE_EXTEND instead, so kunit arguments are respected. Link: https://lore.kernel.org/r/20250407-kunit-sh-v1-1-f5432a54cf2f@linutronix.de Fixes:8110a3cab0("kunit: tool: Add support for SH under QEMU") Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de> Reviewed-by: David Gow <davidgow@google.com> Signed-off-by: Shuah Khan <skhan@linuxfoundation.org> Signed-off-by: Sasha Levin <sashal@kernel.org>