lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date:   Mon, 24 Aug 2020 18:06:01 +0200
From:   Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
To:     Sam Ravnborg <sam@...nborg.org>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Neil Armstrong <narmstrong@...libre.com>,
        Xinliang Liu <xinliang.liu@...aro.org>,
        Wanchun Zheng <zhengwanchun@...ilicon.com>,
        linuxarm@...wei.com, dri-devel <dri-devel@...ts.freedesktop.org>,
        Andrzej Hajda <a.hajda@...sung.com>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        devel@...verdev.osuosl.org, Daniel Borkmann <daniel@...earbox.net>,
        John Fastabend <john.fastabend@...il.com>,
        Xiubin Zhang <zhangxiubin1@...wei.com>,
        Wei Xu <xuwei5@...ilicon.com>, David Airlie <airlied@...ux.ie>,
        Xinwei Kong <kong.kongxinwei@...ilicon.com>,
        Tomi Valkeinen <tomi.valkeinen@...com>,
        Bogdan Togorean <bogdan.togorean@...log.com>,
        Laurentiu Palcu <laurentiu.palcu@....com>,
        linux-media@...r.kernel.org, devicetree@...r.kernel.org,
        Liwei Cai <cailiwei@...ilicon.com>,
        Jesper Dangaard Brouer <hawk@...nel.org>,
        Manivannan Sadhasivam <mani@...nel.org>,
        Chen Feng <puck.chen@...ilicon.com>,
        Alexei Starovoitov <ast@...nel.org>,
        linaro-mm-sig@...ts.linaro.org, Rob Herring <robh+dt@...nel.org>,
        Jakub Kicinski <kuba@...nel.org>, mauro.chehab@...wei.com,
        Rob Clark <robdclark@...omium.org>,
        linux-arm-kernel@...ts.infradead.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, Liuyao An <anliuyao@...wei.com>,
        Rongrong Zou <zourongrong@...il.com>, bpf@...r.kernel.org,
        "David S. Miller" <davem@...emloft.net>
Subject: Re: [PATCH 00/49] DRM driver for Hikey 970

Em Fri, 21 Aug 2020 17:56:50 +0200
Sam Ravnborg <sam@...nborg.org> escreveu:

> Hi Mauro.
> 
> On Fri, Aug 21, 2020 at 04:41:58PM +0200, Mauro Carvalho Chehab wrote:
> > Another quick question:
> > 
> > Em Wed, 19 Aug 2020 19:35:58 +0200
> > Sam Ravnborg <sam@...nborg.org> escreveu:
> >   
> > > > +#define DSS_REDUCE(x)	((x) > 0 ? ((x) - 1) : (x))    
> > > Use generic macros for this?  
> > 
> > Do you know a generic macro similar to this? Or do you mean adding
> > it to include/kernel.h?  
> 
> It looked like something there should be a macro for.
> But I do not know one.
> 
> And no, do not try to go the kernel.h route on this.
> At least not until you see more than one user.

Yeah, adding this to kernel.h just for a single usage is overkill. I would
be expecting that a non-underflow decrement logic is something that 
would be used on other places at the Kernel, but identifying this
pattern would require some time. Maybe Kernel janitors could write some
coccinelle script to replace similar patterns like that into some
macro in the future.

Thanks,
Mauro

Powered by blists - more mailing lists