Re: [PATCH v3 04/12] powerpc: Prepare func_desc_t for refactorisation

[Nicholas Piggin <npiggin@xxxxxxxxx>]

Excerpts from Christophe Leroy's message of October 17, 2021 10:38 pm:
> In preparation of making func_desc_t generic, change the ELFv2
> version to a struct containing 'addr' element.
> 
> This allows using single helpers common to ELFv1 and ELFv2.
> 
> Signed-off-by: Christophe Leroy <christophe.leroy@xxxxxxxxxx>

> ---
>  arch/powerpc/kernel/module_64.c | 32 ++++++++++++++------------------
>  1 file changed, 14 insertions(+), 18 deletions(-)
> 
> diff --git a/arch/powerpc/kernel/module_64.c b/arch/powerpc/kernel/module_64.c
> index a89da0ee25e2..b687ef88c4c4 100644
> --- a/arch/powerpc/kernel/module_64.c
> +++ b/arch/powerpc/kernel/module_64.c
> @@ -33,19 +33,13 @@
>  #ifdef PPC64_ELF_ABI_v2
>  
>  /* An address is simply the address of the function. */
> -typedef unsigned long func_desc_t;
> +typedef struct {
> +	unsigned long addr;
> +} func_desc_t;

I'm not quite following why this change is done. I guess it is so you 
can move this func_desc_t type into core code, but why do that? Is it
just to avoid using the preprocessor?

On its own this patch looks okay.

Acked-by: Nicholas Piggin <npiggin@xxxxxxxxx>