Re: [PATCH 06/32] kasan: introduce kasan_print_aux_stacks

[Marco Elver <elver@google.com>]

On Mon, 13 Jun 2022 at 22:16, <andrey.konovalov@linux.dev> wrote:
>
> From: Andrey Konovalov <andreyknvl@google.com>
>
> Add a kasan_print_aux_stacks() helper that prints the auxiliary stack
> traces for the Generic mode.
>
> This change hides references to alloc_meta from the common reporting code.
> This is desired as only the Generic mode will be using per-object metadata
> after this series.
>
> Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
> ---
>  mm/kasan/kasan.h          |  6 ++++++
>  mm/kasan/report.c         | 15 +--------------
>  mm/kasan/report_generic.c | 20 ++++++++++++++++++++
>  3 files changed, 27 insertions(+), 14 deletions(-)
>
> diff --git a/mm/kasan/kasan.h b/mm/kasan/kasan.h
> index aa6b43936f8d..bcea5ed15631 100644
> --- a/mm/kasan/kasan.h
> +++ b/mm/kasan/kasan.h
> @@ -265,6 +265,12 @@ void kasan_print_address_stack_frame(const void *addr);
>  static inline void kasan_print_address_stack_frame(const void *addr) { }
>  #endif
>
> +#ifdef CONFIG_KASAN_GENERIC
> +void kasan_print_aux_stacks(struct kmem_cache *cache, const void *object);
> +#else
> +static inline void kasan_print_aux_stacks(struct kmem_cache *cache, const void *object) { }
> +#endif

Why not put this into one of the existing "#ifdef
CONFIG_KASAN_GENERIC" blocks? There are several; probably the one 10
lines down might be ok?