Re: [PATCH v5 01/12] vmlinux.lds.h: add linker section for KUnit test suites

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On Fri, Jun 26, 2020 at 02:09:06PM -0700, Brendan Higgins wrote:
> Add a linker section where KUnit can put references to its test suites.
> This patch is the first step in transitioning to dispatching all KUnit
> tests from a centralized executor rather than having each as its own
> separate late_initcall.
> 
> Co-developed-by: Iurii Zaikin <yzaikin@xxxxxxxxxx>
> Signed-off-by: Iurii Zaikin <yzaikin@xxxxxxxxxx>
> Signed-off-by: Brendan Higgins <brendanhiggins@xxxxxxxxxx>
> Reviewed-by: Stephen Boyd <sboyd@xxxxxxxxxx>
> ---
>  include/asm-generic/vmlinux.lds.h | 8 ++++++++
>  1 file changed, 8 insertions(+)
> 
> diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h
> index db600ef218d7d..4f9b036fc9616 100644
> --- a/include/asm-generic/vmlinux.lds.h
> +++ b/include/asm-generic/vmlinux.lds.h
> @@ -881,6 +881,13 @@
>  		KEEP(*(.con_initcall.init))				\
>  		__con_initcall_end = .;
>  
> +/* Alignment must be consistent with (kunit_suite *) in include/kunit/test.h */

Nit on naming:

> +#define KUNIT_TEST_SUITES						\

I would call this KUNIT_TABLE to maintain the same names as other things
of this nature.

> +		. = ALIGN(8);						\
> +		__kunit_suites_start = .;				\
> +		KEEP(*(.kunit_test_suites))				\
> +		__kunit_suites_end = .;
> +
>  #ifdef CONFIG_BLK_DEV_INITRD
>  #define INIT_RAM_FS							\
>  	. = ALIGN(4);							\
> @@ -1056,6 +1063,7 @@
>  		INIT_CALLS						\
>  		CON_INITCALL						\
>  		INIT_RAM_FS						\
> +		KUNIT_TEST_SUITES					\
>  	}

Nack: this must be in INIT_DATA, not in INIT_DATA_SECTION. Not all
architectures use the INIT_DATA_SECTION macro (e.g. arm64), but everything
uses INIT_DATA.


-- 
Kees Cook



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