[PATCH v2 1/2] kasan: support instrumented bitops combined with generic bitops

[Marco Elver]

On Tue, 20 Aug 2019 at 04:50, Daniel Axtens <dja at axtens.net> wrote:
>
> Currently bitops-instrumented.h assumes that the architecture provides
> atomic, non-atomic and locking bitops (e.g. both set_bit and __set_bit).
> This is true on x86 and s390, but is not always true: there is a
> generic bitops/non-atomic.h header that provides generic non-atomic
> operations, and also a generic bitops/lock.h for locking operations.
>
> powerpc uses the generic non-atomic version, so it does not have it's
> own e.g. __set_bit that could be renamed arch___set_bit.
>
> Split up bitops-instrumented.h to mirror the atomic/non-atomic/lock
> split. This allows arches to only include the headers where they
> have arch-specific versions to rename. Update x86 and s390.
>
> (The generic operations are automatically instrumented because they're
> written in C, not asm.)
>
> Suggested-by: Christophe Leroy <christophe.leroy at c-s.fr>
> Reviewed-by: Christophe Leroy <christophe.leroy at c-s.fr>
> Signed-off-by: Daniel Axtens <dja at axtens.net>

Acked-by: Marco Elver <elver at google.com>

Thanks!