linux-kernel - Re: [PATCH v6 20/20] tests/liveupdate: Add in-kernel liveupdate test

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Message-ID: <aRsDb-4bXFQ9Zmtu@kernel.org>
Date: Mon, 17 Nov 2025 13:13:51 +0200
From: Mike Rapoport <rppt@...nel.org>
To: Pasha Tatashin <pasha.tatashin@...een.com>
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Subject: Re: [PATCH v6 20/20] tests/liveupdate: Add in-kernel liveupdate test

On Sat, Nov 15, 2025 at 06:34:06PM -0500, Pasha Tatashin wrote:
> Introduce an in-kernel test module to validate the core logic of the
> Live Update Orchestrator's File-Lifecycle-Bound feature. This
> provides a low-level, controlled environment to test FLB registration
> and callback invocation without requiring userspace interaction or
> actual kexec reboots.
> 
> The test is enabled by the CONFIG_LIVEUPDATE_TEST Kconfig option.
> 
> Signed-off-by: Pasha Tatashin <pasha.tatashin@...een.com>
> ---
>  include/linux/liveupdate/abi/luo.h |   5 +
>  kernel/liveupdate/luo_file.c       |   2 +
>  kernel/liveupdate/luo_internal.h   |   6 ++
>  lib/Kconfig.debug                  |  23 +++++
>  lib/tests/Makefile                 |   1 +
>  lib/tests/liveupdate.c             | 143 +++++++++++++++++++++++++++++
>  6 files changed, 180 insertions(+)
>  create mode 100644 lib/tests/liveupdate.c
> 
> diff --git a/include/linux/liveupdate/abi/luo.h b/include/linux/liveupdate/abi/luo.h
> index 85596ce68c16..cdcace9b48f5 100644
> --- a/include/linux/liveupdate/abi/luo.h
> +++ b/include/linux/liveupdate/abi/luo.h
> @@ -230,4 +230,9 @@ struct luo_flb_ser {
>  	u64 count;
>  } __packed;
>  
> +/* Kernel Live Update Test ABI */
> +#ifdef CONFIG_LIVEUPDATE_TEST
> +#define LIVEUPDATE_TEST_FLB_COMPATIBLE(i)	"liveupdate-test-flb-v" #i
> +#endif
> +
>  #endif /* _LINUX_LIVEUPDATE_ABI_LUO_H */
> diff --git a/kernel/liveupdate/luo_file.c b/kernel/liveupdate/luo_file.c
> index df337c9c4f21..9a531096bdb5 100644
> --- a/kernel/liveupdate/luo_file.c
> +++ b/kernel/liveupdate/luo_file.c
> @@ -834,6 +834,8 @@ int liveupdate_register_file_handler(struct liveupdate_file_handler *fh)
>  	INIT_LIST_HEAD(&fh->flb_list);
>  	list_add_tail(&fh->list, &luo_file_handler_list);
>  
> +	liveupdate_test_register(fh);
> +

Why this cannot be called from the test?

>  	return 0;
>  }
>  

-- 
Sincerely yours,
Mike.