Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
Date:   Sat, 30 Oct 2021 09:51:50 +0200
From:   Len Baker <len.baker@gmx.com>
To:     Jani Nikula <jani.nikula@linux.intel.com>
Cc:     Len Baker <len.baker@gmx.com>, Daniel Vetter <daniel@ffwll.ch>,
        Joonas Lahtinen <joonas.lahtinen@linux.intel.com>,
        Rodrigo Vivi <rodrigo.vivi@intel.com>,
        David Airlie <airlied@linux.ie>,
        Kees Cook <keescook@chromium.org>,
        "Gustavo A. R. Silva" <gustavoars@kernel.org>,
        intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org,
        linux-hardening@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] drm/i915: Prefer struct_size over open coded arithmetic
Message-ID: <20211030075150.GA3486@titan>
References: <20211003104258.18550-1-len.baker@gmx.com>
 <20211011092304.GA5790@titan>
 <87k0ihxj56.fsf@intel.com>
 <YWbIQmD1TGikpRm2@phenom.ffwll.local>
 <20211016111602.GA1996@titan>
 <877deatzz2.fsf@intel.com>
 <20211023115020.GC4145@titan>
 <87ee86h5hn.fsf@intel.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <87ee86h5hn.fsf@intel.com>
Content-Transfer-Encoding: quoted-printable
Precedence: bulk

Hi,

On Wed, Oct 27, 2021 at 06:06:28PM +0300, Jani Nikula wrote:
> On Sat, 23 Oct 2021, Len Baker <len.baker@gmx.com> wrote:
> > Sorry, but I'm missing something here. In linux-next this is the commi=
t
> > history of include/linux/stddef.h file:
> >
> > 3080ea5553cc stddef: Introduce DECLARE_FLEX_ARRAY() helper
> > 50d7bd38c3aa stddef: Introduce struct_group() helper macro
> > e7f18c22e6be stddef: Fix kerndoc for sizeof_field() and offsetofend()
> > 4229a470175b stddef.h: Introduce sizeof_field()
> > ...
> >
> > But in drm-tip this is the commit history:
> >
> > 4229a470175b stddef.h: Introduce sizeof_field()
> > ...
> >
> > For this patch the DECLARE_FLEX_ARRAY() helper is needed. But the buil=
d
> > fails due to the last tree commits for stddef.h file are not present.
> > So, if I understand correctly, drm-tip is not up to date with linux-ne=
xt.
>
> linux-next is an ephemeral integration branch for most arch, subsystem
> and driver -next branches.
>
> drm-tip is an ephemeral integration branch for drm subsystem and driver
> -next branches.
>
> They contain different sets of branches. They are constantly
> rebuilt. They are not the end result or end goal.
>
> If a problem (or a solution, for that matter) only exists in the merge
> of some of those branches, you can't actually fix it until such a merge
> exists somewhere more permanent than an ephemeral integration branch.

Ok, understood. Thanks for the clarification.

Regards,
Len