Re: [PATCH v6 2/2] kasan: Add memzero int for unaligned size at DEBUG

[Marco Elver]

On Mon, 5 Jul 2021 at 13:12, Andrey Konovalov <andreyknvl@xxxxxxxxx> wrote:
[...]
> > +       /*
> > +        * Explicitly initialize the memory with the precise object size to
> > +        * avoid overwriting the SLAB redzone. This disables initialization in
> > +        * the arch code and may thus lead to performance penalty. The penalty
> > +        * is accepted since SLAB redzones aren't enabled in production builds.
> > +        */
> > +       if (__slub_debug_enabled() &&
>
> What happened to slub_debug_enabled_unlikely()? Was it renamed? Why? I
> didn't receive patch #1 of v6 (nor of v5).

Somebody had the same idea with the helper:
https://lkml.kernel.org/r/YOKsC75kJfCZwySD@xxxxxxxxxxxxxxxx
and Matthew didn't like the _unlikely() prefix.

Which meant we should just move the existing helper introduced in the
merge window.

Patch 1/2: https://lkml.kernel.org/r/20210705103229.8505-2-yee.lee@xxxxxxxxxxxx

Thanks,
-- Marco