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From: Andrew Lunn <andrew@lunn.ch>
To: Nick Desaulniers <ndesaulniers@google.com>
Cc: netdev <netdev@vger.kernel.org>,
	David Miller <davem@davemloft.net>,
	Jakub Kicinski <kuba@kernel.org>,
	Masahiro Yamada <masahiroy@kernel.org>,
	Michal Marek <michal.lkml@markovi.net>,
	Rohit Maheshwari <rohitm@chelsio.com>,
	Linux Kbuild mailing list <linux-kbuild@vger.kernel.org>,
	clang-built-linux <clang-built-linux@googlegroups.com>,
	Arnd Bergmann <arnd@arndb.de>
Subject: Re: [PATCH net-next v2 1/2] Makefile.extrawarn: Add symbol for W=1 warnings for today
Date: Mon, 5 Oct 2020 21:49:13 +0200
Message-ID: <20201005194913.GC56634@lunn.ch> (raw)
In-Reply-To: <CAKwvOdmdfwWsRtJHtJ16B0RMyoxUi1587OKnyunQd5gfwmnGsA@mail.gmail.com>

> Sorry, to be more specific about my concern; I like the idea of
> exporting the W=* flags, then selectively applying them via
> subdir-ccflags-y.  I don't like the idea of supporting W=1 as defined
> at a precise point in time via multiple date specific symbols.  If
> someone adds something to W=1, then they should need to ensure subdirs
> build warning-free, so I don't think you need to "snapshot" W=1 based
> on what it looked like on 20200930.

Hi Nick

That then contradicts what Masahiro Yamada said to the first version i
posted:

https://www.spinics.net/lists/netdev/msg685284.html
> With this patch series applied, where should we add -Wfoo-bar?
> Adding it to W=1 would emit warnings under drivers/net/ since W=1 is
> now the default for the net subsystem.

The idea with the date stamps was to allow new warnings to be added to
W=1 without them immediately causing warnings on normal builds. You
are saying that whoever adds a new warning to W=1 needs to cleanup the
tree which is already W=1 clean? That might have the side effect that
no more warnings are added to W=1 :-(

   Andrew

  reply index

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-10-01  1:12 [RFC PATCH net-next v2 0/2] driver/net/ethernet W=1 by default Andrew Lunn
2020-10-01  1:12 ` [PATCH net-next v2 1/2] Makefile.extrawarn: Add symbol for W=1 warnings for today Andrew Lunn
2020-10-01 23:09   ` Nick Desaulniers
2020-10-02  1:44     ` Andrew Lunn
2020-10-02 12:20       ` Arnd Bergmann
2020-10-02 12:51         ` Andrew Lunn
2020-10-02 13:15           ` Arnd Bergmann
2020-10-12  1:00         ` Masahiro Yamada
2020-10-12  8:05           ` Arnd Bergmann
2020-10-05 17:31       ` Nick Desaulniers
2020-10-05 19:49         ` Andrew Lunn [this message]
2020-10-05 20:03           ` Arnd Bergmann
2020-10-05 21:08             ` Andrew Lunn
2020-10-11 13:03               ` Masahiro Yamada
2020-10-12  8:11                 ` Arnd Bergmann
2020-10-16 14:12                 ` Andrew Lunn
     [not found]                   ` <CAK8P3a1nBhmf1PQwHHbEjiVgRTXi4UuJAbwuK92CKEbR=yKGWw@mail.gmail.com>
2020-10-17 14:57                     ` Andrew Lunn
2020-10-02 11:08   ` kernel test robot
2020-10-01  1:12 ` [PATCH net-next v2 2/2] driver/net/ethernet: Sign up for W=1 as defined on 20200930 Andrew Lunn

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