linux-kernel - Re: clang warning: implicit conversion in intel

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Date:   Fri, 02 Feb 2018 12:44:38 +0200
From:   Jani Nikula <jani.nikula@...ux.intel.com>
To:     Greg KH <gregkh@...uxfoundation.org>,
        Lukas Bulwahn <lukas.bulwahn@...il.com>,
        Knut Omang <knut.omang@...cle.com>
Cc:     Ozan Alpay <ozyalpy@...il.com>,
        Rodrigo Vivi <rodrigo.vivi@...el.com>,
        Ville Syrjälä <ville.syrjala@...ux.intel.com>,
        sil2review@...ts.osadl.org, kernelnewbies@...nelnewbies.org,
        David Airlie <airlied@...ux.ie>,
        intel-gfx@...ts.freedesktop.org,
        Joonas Lahtinen <joonas.lahtinen@...ux.intel.com>,
        llvmlinux@...ts.linuxfoundation.org, linux-kernel@...r.kernel.org,
        dri-devel@...ts.freedesktop.org
Subject: Re: clang warning: implicit conversion in intel_ddi.c:1481


+Knut, Fengguang

On Fri, 02 Feb 2018, Greg KH <gregkh@...uxfoundation.org> wrote:
> 	- If clang now builds the kernel "cleanly", yes, I want to take
> 	  warning fixes in the stable tree.  And even better yet, if you
> 	  keep working to ensure the tree is "clean", that would be
> 	  wonderful.

So we can run sparse using 'make C=1' and friends, or other static
analysis tools using 'make CHECK=foo C=1', as long as the passed command
line params work. There was work by Knut to extend this make checker
stuff [1]. Since mixing different HOSTCC's in a single workdir seems
like a bad idea, I wonder how hard it would be to make clang work like
this:

$ make CHECK=clang C=1

Or using Knut's wrapper. Feels like that could increase the use of clang
for static analysis of patches.


BR,
Jani.


[1] http://mid.mail-archive.com/cover.5b56d020b8e826a7da33b1823c059acd0c123f8b.1515072782.git-series.knut.omang@oracle.com



-- 
Jani Nikula, Intel Open Source Technology Center