On Thu, 22 Oct 2020 at 15:19, Andrey Konovalov <andreyknvl@xxxxxxxxxx> wrote: > > TODO: no meaningful description here yet, please see the cover letter > for this RFC series. > > Signed-off-by: Andrey Konovalov <andreyknvl@xxxxxxxxxx> > Link: https://linux-review.googlesource.com/id/If7d37003875b2ed3e0935702c8015c223d6416a4 > --- > mm/kasan/common.c | 92 +++++++++++++----------- > mm/kasan/generic.c | 5 ++ > mm/kasan/hw_tags.c | 169 ++++++++++++++++++++++++++++++++++++++++++++- > mm/kasan/kasan.h | 9 +++ > mm/kasan/report.c | 14 +++- > mm/kasan/sw_tags.c | 5 ++ > 6 files changed, 250 insertions(+), 44 deletions(-) > > diff --git a/mm/kasan/common.c b/mm/kasan/common.c > index 1a5e6c279a72..cc129ef62ab1 100644 > --- a/mm/kasan/common.c > +++ b/mm/kasan/common.c > @@ -129,35 +129,37 @@ void kasan_cache_create(struct kmem_cache *cache, unsigned int *size, > unsigned int redzone_size; > int redzone_adjust; > > - /* Add alloc meta. */ > - cache->kasan_info.alloc_meta_offset = *size; > - *size += sizeof(struct kasan_alloc_meta); > - > - /* Add free meta. */ > - if (IS_ENABLED(CONFIG_KASAN_GENERIC) && > - (cache->flags & SLAB_TYPESAFE_BY_RCU || cache->ctor || > - cache->object_size < sizeof(struct kasan_free_meta))) { > - cache->kasan_info.free_meta_offset = *size; > - *size += sizeof(struct kasan_free_meta); > - } > - > - redzone_size = optimal_redzone(cache->object_size); > - redzone_adjust = redzone_size - (*size - cache->object_size); > - if (redzone_adjust > 0) > - *size += redzone_adjust; > - > - *size = min_t(unsigned int, KMALLOC_MAX_SIZE, > - max(*size, cache->object_size + redzone_size)); > + if (static_branch_unlikely(&kasan_stack)) { I just looked at this file in your Github repo, and noticed that this could just be if (!static_branch_unlikely(&kasan_stack)) return; since the if-block ends at the function. That might hopefully make the diff a bit smaller. Thanks, -- Marco
