linux-kernel - Re: [PATCH 0/7] Silence even more W=2 warnings

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Message-ID: <20140925164446.GD28201@nazgul.tnic>
Date:	Thu, 25 Sep 2014 18:44:46 +0200
From:	Borislav Petkov <bp@...en8.de>
To:	Geert Uytterhoeven <geert@...ux-m68k.org>
Cc:	Jeff Kirsher <jeffrey.t.kirsher@...el.com>,
	"Rustad, Mark D" <mark.d.rustad@...el.com>,
	"sparse@...isli.org" <sparse@...isli.org>,
	"linux-sparse@...r.kernel.org" <linux-sparse@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 0/7] Silence even more W=2 warnings

On Thu, Sep 25, 2014 at 09:45:29AM +0200, Geert Uytterhoeven wrote:
> Instead of grepping, you can feed the build log to linux-log-summary.
> Or when changing a driver, feed the before and after build logs to
> linux-log-diff. That way you won't miss the single new warning you've
> just introduced.
> 
> https://github.com/geertu/linux-scripts

Yep, nice stuff: linux-log-summary does nicely summarize it all like
this here:

...
include/linux/kernel.h:120:19: warning: cast from function call of type ‘void *’ to non-matching type ‘long unsigned int’ [-Wbad-function-cast]: 40 warnings in 1 logs
include/linux/kernel.h:67:27: warning: conversion to ‘int’ from ‘long unsigned int’ may alter its value [-Wconversion]: 2 warnings in 1 logs
include/linux/kernel.h:67:33: warning: conversion to ‘long unsigned int’ from ‘int’ may change the sign of the result [-Wsign-conversion]: 3 warnings in 1 logs
...

which I ran on a file built with W=123.

So I'd say everything needed is there to massage those build logs.

Thanks.

-- 
Regards/Gruss,
    Boris.
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