On Mon, 13 Jun 2022 at 22:16, <andrey.konovalov@xxxxxxxxx> wrote:
>
> From: Andrey Konovalov <andreyknvl@xxxxxxxxxx>
>
> Remove implementations of the metadata-related functions for the tag-based
> modes.
>
> The following patches in the series will provide alternative
> implementations.
>
> As of this patch, the tag-based modes no longer collect alloc and free
> stack traces. This functionality will be restored later in the series.
>
> Signed-off-by: Andrey Konovalov <andreyknvl@xxxxxxxxxx>
Reviewed-by: Marco Elver <elver@xxxxxxxxxx>
> ---
> mm/kasan/tags.c | 33 ++-------------------------------
> 1 file changed, 2 insertions(+), 31 deletions(-)
>
> diff --git a/mm/kasan/tags.c b/mm/kasan/tags.c
> index 2e200969a4b8..f11c89505c77 100644
> --- a/mm/kasan/tags.c
> +++ b/mm/kasan/tags.c
> @@ -19,54 +19,25 @@
>
> void kasan_init_object_meta(struct kmem_cache *cache, const void *object)
> {
> - struct kasan_alloc_meta *alloc_meta;
> -
> - alloc_meta = kasan_get_alloc_meta(cache, object);
> - if (alloc_meta)
> - __memset(alloc_meta, 0, sizeof(*alloc_meta));
> }
>
> void kasan_save_alloc_info(struct kmem_cache *cache, void *object, gfp_t flags)
> {
> - struct kasan_alloc_meta *alloc_meta;
> -
> - alloc_meta = kasan_get_alloc_meta(cache, object);
> - if (alloc_meta)
> - kasan_set_track(&alloc_meta->alloc_track, flags);
> }
>
> void kasan_save_free_info(struct kmem_cache *cache,
> void *object, u8 tag)
> {
> - struct kasan_alloc_meta *alloc_meta;
> -
> - alloc_meta = kasan_get_alloc_meta(cache, object);
> - if (!alloc_meta)
> - return;
> -
> - kasan_set_track(&alloc_meta->free_track, GFP_NOWAIT);
> }
>
> struct kasan_track *kasan_get_alloc_track(struct kmem_cache *cache,
> void *object)
> {
> - struct kasan_alloc_meta *alloc_meta;
> -
> - alloc_meta = kasan_get_alloc_meta(cache, object);
> - if (!alloc_meta)
> - return NULL;
> -
> - return &alloc_meta->alloc_track;
> + return NULL;
> }
>
> struct kasan_track *kasan_get_free_track(struct kmem_cache *cache,
> void *object, u8 tag)
> {
> - struct kasan_alloc_meta *alloc_meta;
> -
> - alloc_meta = kasan_get_alloc_meta(cache, object);
> - if (!alloc_meta)
> - return NULL;
> -
> - return &alloc_meta->free_track;
> + return NULL;
> }
> --
> 2.25.1
>
> --
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