Re: [PATCH 00/18] use semicolons rather than commas to separate statements

From: Ard Biesheuvel <ardb@kernel.org>
To: Julia Lawall <Julia.Lawall@inria.fr>
Cc: linux-iio@vger.kernel.org, drbd-dev@lists.linbit.com,
	"Valdis Klētnieks" <valdis.kletnieks@vt.edu>,
	"David Lechner" <david@lechnology.com>,
	"Neil Armstrong" <narmstrong@baylibre.com>,
	"Martin Blumenstingl" <martin.blumenstingl@googlemail.com>,
	linux-wireless@vger.kernel.org,
	"Rafael J. Wysocki" <rafael@kernel.org>,
	kernel-janitors@vger.kernel.org,
	"Linux Kernel Mailing List" <linux-kernel@vger.kernel.org>,
	linux-stm32@st-md-mailman.stormreply.com,
	linux-block@vger.kernel.org, linux-ide@vger.kernel.org,
	"Linux Crypto Mailing List" <linux-crypto@vger.kernel.org>,
	"Joe Perches" <joe@perches.com>,
	linux-amlogic@lists.infradead.org,
	"Thomas Gleixner" <tglx@linutronix.de>,
	"ACPI Devel Maling List" <linux-acpi@vger.kernel.org>,
	openipmi-developer@lists.sourceforge.net,
	linux-clk@vger.kernel.org,
	"Linux ARM" <linux-arm-kernel@lists.infradead.org>,
	"Jerome Brunet" <jbrunet@baylibre.com>
Subject: Re: [PATCH 00/18] use semicolons rather than commas to separate statements
Date: Tue, 29 Sep 2020 14:20:00 +0200	[thread overview]
Message-ID: <CAMj1kXGh+CzuXkAnqsoMO2A3T1p=D6uFOV347Ym5+VFn5U1gWg@mail.gmail.com> (raw)
In-Reply-To: <1601233948-11629-1-git-send-email-Julia.Lawall@inria.fr>

On Sun, 27 Sep 2020 at 21:56, Julia Lawall <Julia.Lawall@inria.fr> wrote:
>
> These patches replace commas by semicolons.

Why?

> This was done using the
> Coccinelle semantic patch (http://coccinelle.lip6.fr/) shown below.
>
> This semantic patch ensures that commas inside for loop headers will not be
> transformed.  It also doesn't touch macro definitions.
>
> Coccinelle ensures that braces are added as needed when a single-statement
> branch turns into a multi-statement one.
>
> This semantic patch has a few false positives, for variable delcarations
> such as:
>
> LIST_HEAD(x), *y;
>
> The semantic patch could be improved to avoid these, but for the moment
> they have been removed manually (2 occurrences).
>
> // <smpl>
> @initialize:ocaml@
> @@
>
> let infunction p =
>   (* avoid macros *)
>   (List.hd p).current_element <> "something_else"
>
> let combined p1 p2 =
>   (List.hd p1).line_end = (List.hd p2).line ||
>   (((List.hd p1).line_end < (List.hd p2).line) &&
>    ((List.hd p1).col < (List.hd p2).col))
>
> @bad@
> statement S;
> declaration d;
> position p;
> @@
>
> S@p
> d
>
> // special cases where newlines are needed (hope for no more than 5)
> @@
> expression e1,e2;
> statement S;
> position p != bad.p;
> position p1;
> position p2 :
>     script:ocaml(p1) { infunction p1 && combined p1 p2 };
> @@
>
> - e1@p1,@S@p e2@p2;
> + e1; e2;
>
> @@
> expression e1,e2;
> statement S;
> position p != bad.p;
> position p1;
> position p2 :
>     script:ocaml(p1) { infunction p1 && combined p1 p2 };
> @@
>
> - e1@p1,@S@p e2@p2;
> + e1; e2;
>
> @@
> expression e1,e2;
> statement S;
> position p != bad.p;
> position p1;
> position p2 :
>     script:ocaml(p1) { infunction p1 && combined p1 p2 };
> @@
>
> - e1@p1,@S@p e2@p2;
> + e1; e2;
>
> @@
> expression e1,e2;
> statement S;
> position p != bad.p;
> position p1;
> position p2 :
>     script:ocaml(p1) { infunction p1 && combined p1 p2 };
> @@
>
> - e1@p1,@S@p e2@p2;
> + e1; e2;
>
> @@
> expression e1,e2;
> statement S;
> position p != bad.p;
> position p1;
> position p2 :
>     script:ocaml(p1) { infunction p1 && combined p1 p2 };
> @@
>
> - e1@p1,@S@p e2@p2;
> + e1; e2;
>
> @r@
> expression e1,e2;
> statement S;
> position p != bad.p;
> @@
>
> e1 ,@S@p e2;
>
> @@
> expression e1,e2;
> position p1;
> position p2 :
>     script:ocaml(p1) { infunction p1 && not(combined p1 p2) };
> statement S;
> position r.p;
> @@
>
> e1@p1
> -,@S@p
> +;
> e2@p2
> ... when any
> // </smpl>
>
> ---
>
>  drivers/acpi/processor_idle.c               |    4 +++-
>  drivers/ata/pata_icside.c                   |   21 +++++++++++++--------
>  drivers/base/regmap/regmap-debugfs.c        |    2 +-
>  drivers/bcma/driver_pci_host.c              |    4 ++--
>  drivers/block/drbd/drbd_receiver.c          |    6 ++++--
>  drivers/char/agp/amd-k7-agp.c               |    2 +-
>  drivers/char/agp/nvidia-agp.c               |    2 +-
>  drivers/char/agp/sworks-agp.c               |    2 +-
>  drivers/char/hw_random/iproc-rng200.c       |    8 ++++----
>  drivers/char/hw_random/mxc-rnga.c           |    6 +++---
>  drivers/char/hw_random/stm32-rng.c          |    8 ++++----
>  drivers/char/ipmi/bt-bmc.c                  |    6 +++---
>  drivers/clk/meson/meson-aoclk.c             |    2 +-
>  drivers/clk/mvebu/ap-cpu-clk.c              |    2 +-
>  drivers/clk/uniphier/clk-uniphier-cpugear.c |    2 +-
>  drivers/clk/uniphier/clk-uniphier-mux.c     |    2 +-
>  drivers/clocksource/mps2-timer.c            |    6 +++---
>  drivers/clocksource/timer-armada-370-xp.c   |    8 ++++----
>  drivers/counter/ti-eqep.c                   |    2 +-
>  drivers/crypto/amcc/crypto4xx_alg.c         |    2 +-
>  drivers/crypto/atmel-tdes.c                 |    2 +-
>  drivers/crypto/hifn_795x.c                  |    4 ++--
>  drivers/crypto/talitos.c                    |    8 ++++----
>  23 files changed, 60 insertions(+), 51 deletions(-)
>
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