Re: [PATCH v2 5/5] dyndbg.lds.S: fix lost dyndbg sections in modules

[Petr Pavlu]

On 5/7/26 10:40 PM, Jim Cromie wrote:
> With CONFIG_DRM_USE_DYNAMIC_DEBUG=y, several build configs had
> problems with __dyndbg* sections getting lost in drm drivers.  Fix
> this by following the model demonstrated in codetag.lds.h.
> 
> Introduce include/asm-generic/dyndbg.lds.h, to bundle dynamic-debug's
> multiple sections together, into 2 macros:
> 
> vmlinux.lds.h DATA_DATA: move the 2 BOUNDED_SECTION_BY(__dyndbg*)
> calls into dyndbg.lds.h DYNDBG_SECTIONS(). vmlinux.lds.h now includes
> the new file and calls the new macro.
> 
> MOD_DYNDBG_SECTIONS declares the 2 BOUNDED_SECTION_BY calls, but wraps
> them with output section syntax to keep them as known and separate ELF
> sections in the module.ko.  The KEEP fixes the lost section.
> 
> dyndbg.lds.h includes (reuses) bounded-section.lds.h
> 
> scripts/module.lds.S: now calls MOD_DYNDBG_SECTIONS right before the
> CODETAG macro (consistent with their placements in vmlinux.lds.h), and
> also includes dyndbg.lds.h
> 
> This isolates vmlinux.lds.h from further __dyndbg section additions.
> 
> CC: Arnd Bergmann <arnd@xxxxxxxx>
> Signed-off-by: Jim Cromie <jim.cromie@xxxxxxxxx>
> ---
> [...]
> diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h
> index d9d2eb708355..54897d742c6c 100644
> --- a/include/asm-generic/vmlinux.lds.h
> +++ b/include/asm-generic/vmlinux.lds.h
> @@ -332,6 +332,7 @@
>  /*
>   * .data section
>   */
> +#include <asm-generic/dyndbg.lds.h>
>  #define DATA_DATA							\
>  	*(.xiptext)							\
>  	*(DATA_MAIN)	

Nit: I suggest placing the dyndbg.lds.h include at the top of the file,
as is usual, together with the codetag.lds.h include.

Otherwise, this looks ok to me. Feel free to add:

Reviewed-by: Petr Pavlu <petr.pavlu@xxxxxxxx>

-- 
Thanks,
Petr