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From:   Alexander Potapenko <glider@google.com>
Date:   Thu, 17 Sep 2020 11:51:19 +0200
Message-ID: <CAG_fn=W1CqBgCqpYBNgYE7V+i4iqK4iyVydJyz7K4Zfc0zZvEw@mail.gmail.com>
Subject: Re: [PATCH v2 05/10] mm, kfence: insert KFENCE hooks for SLUB
To:     Christopher Lameter <cl@linux.com>
Cc:     Marco Elver <elver@google.com>,
        Andrew Morton <akpm@linux-foundation.org>,
        "H. Peter Anvin" <hpa@zytor.com>,
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On Thu, Sep 17, 2020 at 11:40 AM Christopher Lameter <cl@linux.com> wrote:
>
> On Tue, 15 Sep 2020, Marco Elver wrote:
>
> >  void *kmem_cache_alloc(struct kmem_cache *s, gfp_t gfpflags)
> >  {
> > -     void *ret =3D slab_alloc(s, gfpflags, _RET_IP_);
> > +     void *ret =3D slab_alloc(s, gfpflags, _RET_IP_, s->object_size);
>
> The additional size parameter is a part of a struct kmem_cache that is
> already passed to the function. Why does the parameter list need to be
> expanded?

See my response to the similar question about the SLAB allocator:
https://lore.kernel.org/linux-arm-kernel/CAG_fn=3DXMc8NPZPFtUE=3DrdoR=3DXJH=
4F+TxZs-w5n4VuaWKTjcasw@mail.gmail.com/


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Alexander Potapenko
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