linux-kernel - Re: [PATCH v2 00/20] pinctrl: Use scope based of_node

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date: Fri, 31 May 2024 09:06:30 +0200
From: Geert Uytterhoeven <geert@...ux-m68k.org>
To: Peng Fan <peng.fan@....com>
Cc: "Peng Fan (OSS)" <peng.fan@....nxp.com>, Linus Walleij <linus.walleij@...aro.org>, 
	Thierry Reding <thierry.reding@...il.com>, Jonathan Hunter <jonathanh@...dia.com>, 
	Dvorkin Dmitry <dvorkin@...bo.com>, Wells Lu <wellslutw@...il.com>, 
	Maxime Coquelin <mcoquelin.stm32@...il.com>, Alexandre Torgue <alexandre.torgue@...s.st.com>, 
	Emil Renner Berthing <kernel@...il.dk>, Jianlong Huang <jianlong.huang@...rfivetech.com>, 
	Hal Feng <hal.feng@...rfivetech.com>, Orson Zhai <orsonzhai@...il.com>, 
	Baolin Wang <baolin.wang@...ux.alibaba.com>, Chunyan Zhang <zhang.lyra@...il.com>, 
	Viresh Kumar <vireshk@...nel.org>, Shiraz Hashim <shiraz.linux.kernel@...il.com>, 
	"soc@...nel.org" <soc@...nel.org>, Krzysztof Kozlowski <krzk@...nel.org>, 
	Sylwester Nawrocki <s.nawrocki@...sung.com>, Alim Akhtar <alim.akhtar@...sung.com>, 
	Geert Uytterhoeven <geert+renesas@...der.be>, Patrice Chotard <patrice.chotard@...s.st.com>, 
	Heiko Stuebner <heiko@...ech.de>, Damien Le Moal <dlemoal@...nel.org>, 
	Ludovic Desroches <ludovic.desroches@...rochip.com>, 
	Nicolas Ferre <nicolas.ferre@...rochip.com>, 
	Alexandre Belloni <alexandre.belloni@...tlin.com>, Claudiu Beznea <claudiu.beznea@...on.dev>, 
	Aisheng Dong <aisheng.dong@....com>, Fabio Estevam <festevam@...il.com>, 
	Shawn Guo <shawnguo@...nel.org>, Jacky Bai <ping.bai@....com>, 
	Pengutronix Kernel Team <kernel@...gutronix.de>, Chester Lin <chester62515@...il.com>, 
	Matthias Brugger <mbrugger@...e.com>, 
	"Ghennadi Procopciuc (OSS)" <ghennadi.procopciuc@....nxp.com>, Sean Wang <sean.wang@...nel.org>, 
	Matthias Brugger <matthias.bgg@...il.com>, 
	AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>, 
	Sascha Hauer <s.hauer@...gutronix.de>, Andrew Jeffery <andrew@...econstruct.com.au>, 
	Joel Stanley <joel@....id.au>, Dan Carpenter <dan.carpenter@...aro.org>, 
	Tony Lindgren <tony@...mide.com>, Stephen Warren <swarren@...dotorg.org>, 
	"linux-gpio@...r.kernel.org" <linux-gpio@...r.kernel.org>, 
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, 
	"linux-tegra@...r.kernel.org" <linux-tegra@...r.kernel.org>, 
	"linux-arm-kernel@...ts.infradead.org" <linux-arm-kernel@...ts.infradead.org>, 
	"linux-stm32@...md-mailman.stormreply.com" <linux-stm32@...md-mailman.stormreply.com>, 
	"linux-samsung-soc@...r.kernel.org" <linux-samsung-soc@...r.kernel.org>, 
	"linux-renesas-soc@...r.kernel.org" <linux-renesas-soc@...r.kernel.org>, 
	"linux-rockchip@...ts.infradead.org" <linux-rockchip@...ts.infradead.org>, 
	"linux-riscv@...ts.infradead.org" <linux-riscv@...ts.infradead.org>, 
	"linux-mediatek@...ts.infradead.org" <linux-mediatek@...ts.infradead.org>, 
	"imx@...ts.linux.dev" <imx@...ts.linux.dev>, 
	"linux-aspeed@...ts.ozlabs.org" <linux-aspeed@...ts.ozlabs.org>, 
	"openbmc@...ts.ozlabs.org" <openbmc@...ts.ozlabs.org>, 
	Emil Renner Berthing <emil.renner.berthing@...onical.com>
Subject: Re: [PATCH v2 00/20] pinctrl: Use scope based of_node_put() cleanups

Hi Peng,

On Fri, May 31, 2024 at 5:07 AM Peng Fan <peng.fan@....com> wrote:
> > Subject: Re: [PATCH v2 00/20] pinctrl: Use scope based of_node_put()
> > cleanups
> > On Sat, May 4, 2024 at 3:12 PM Peng Fan (OSS) <peng.fan@....nxpcom>
> > wrote:
> > > Use scope based of_node_put() to simplify code. It reduces the chance
> > > of forgetting of_node_put(), and also simplifies error handling path.
> > > I not able to test the changes on all the hardwares, so driver owners,
> > > please help review when you have time.
> > >
> > > This patchset was inspired from Dan's comments on pinctrl-scmi-imx.c,
> > > thanks.
> > >
> > > Signed-off-by: Peng Fan <peng.fan@....com>
> >
> > Andy's question about code generation on a related patch made me wonder,
> > too.
> >
> > On arm32, a conversion to for_each_child_of_node_scoped() seems to cost ca.
> > 48 bytes of additional code, regardless of whether there were explicit
> > cleanups before or not.
> >
> > I checked "pinctrl: renesas: Use scope based of_node_put() cleanups", and all
> > but the conversions in *_dt_node_to_map() cost 48 bytes each.
>
> I am not sure this is an issue or else. What would you suggest me to do?
> If you think extra 48bytes consumption is not good here, feel free to drop the
> patch.

I suggest doing nothing about this.  I just wanted people to be aware
of the impact.  I guess it's just part of the slow but steady increase
of kernel size (ca. 20-30 KiB/release)... ;-)

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68korg

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds