linux-kernel - Re: [PATCH 00/21] [Set 2] Rid W=1 warnings from Clock

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Date:   Fri, 12 Feb 2021 13:02:21 -0800
From:   Stephen Boyd <sboyd@...nel.org>
To:     Lee Jones <lee.jones@...aro.org>
Cc:     linux-kernel@...r.kernel.org,
        Ahmad Fatoum <a.fatoum@...gutronix.de>,
        Andy Gross <agross@...nel.org>,
        Avi Fishman <avifishman70@...il.com>,
        Benjamin Fair <benjaminfair@...gle.com>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Boris BREZILLON <boris.brezillon@...e-electrons.com>,
        Chen-Yu Tsai <wens@...e.org>,
        Emilio López <emilio@...pez.com.ar>,
        Fabio Estevam <festevam@...il.com>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Jan Kotas <jank@...ence.com>,
        Jernej Skrabec <jernej.skrabec@...l.net>,
        Jonathan Hunter <jonathanh@...dia.com>,
        linux-arm-kernel@...ts.infradead.org,
        linux-arm-msm@...r.kernel.org, linux-clk@...r.kernel.org,
        linux-omap@...r.kernel.org, linux-renesas-soc@...r.kernel.org,
        linux-tegra@...r.kernel.org, Loc Ho <lho@....com>,
        Maxime Ripard <mripard@...nel.org>,
        Michael Turquette <mturquette@...libre.com>,
        Michal Simek <michal.simek@...inx.com>,
        Nancy Yuen <yuenn@...gle.com>,
        Nuvoton Technologies <tali.perry@...oton.com>,
        NXP Linux Team <linux-imx@....com>, openbmc@...ts.ozlabs.org,
        Patrick Venture <venture@...gle.com>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Peter De Schrijver <pdeschrijver@...dia.com>,
        Philipp Zabel <p.zabel@...gutronix.de>,
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        Richard Woodruff <r-woodruff2@...com>,
        Russell King <linux@...linux.org.uk>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Shawn Guo <shawnguo@...nel.org>,
        Shiraz Hashim <shiraz.linux.kernel@...il.com>,
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        Tali Perry <tali.perry1@...il.com>,
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        Thierry Reding <thierry.reding@...il.com>,
        Tomer Maimon <tmaimon77@...il.com>,
        Viresh Kumar <vireshk@...nel.org>
Subject: Re: [PATCH 00/21] [Set 2] Rid W=1 warnings from Clock

Quoting Lee Jones (2021-02-12 01:20:16)
> On Thu, 11 Feb 2021, Stephen Boyd wrote:
> 
> > Quoting Lee Jones (2021-02-11 13:10:54)
> > > On Thu, 11 Feb 2021, Stephen Boyd wrote:
> > > 
> > > > Quoting Lee Jones (2021-01-26 04:45:19)
> > > > > This set is part of a larger effort attempting to clean-up W=1
> > > > > kernel builds, which are currently overwhelmingly riddled with
> > > > > niggly little warnings.
> > > > > 
> > > > > This is the last set.  Clock is clean after this.
> > > > 
> > > > Is it possible to slam in some patch that makes W=1 the default for the
> > > > clk directory? I'm trying to avoid seeing this patch series again.
> > > 
> > > One of my main goals of this project is that everyone (contributors,
> > > maintainers auto-builder robots etc) will be enabling W=1 builds
> > > *locally*.
> > > 
> > > This isn't something you'll want to do at a global (i.e. in Mainline)
> > > level.  That's kinda the point of W=1.
> > > 
> > 
> > Agreed, but is it possible to pass W=1 in the drivers/clk/Makefile?
> 
> That would circumvent the point of W=1.  Level-1 warnings are deemed,
> and I'm paraphrasing/making this up "not worth rejecting pull-requests
> over".  In contrast, if Linus catches any W=0 warnings at pull-time,
> he will reject the pull-request as 'untested'.
> 
> W=1 is defiantly something you'll want to enable locally though, and
> subsequently push back on contributors submitting code adding new
> ones.
> 

Why should I install a land mine for others to trip over? Won't that
just take them more time because they won't know to compile with W=1 and
then will have to go for another round of review while I push back on
them submitting new warnings?