Re: [PATCH 09/11] misc: throttler: Add core support for non-thermal throttling

From: Matthias Kaehlcke <mka@chromium.org>
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: MyungJoo Ham <myungjoo.ham@samsung.com>,
	Kyungmin Park <kyungmin.park@samsung.com>,
	Chanwoo Choi <cw00.choi@samsung.com>,
	Arnd Bergmann <arnd@arndb.de>, Rob Herring <robh+dt@kernel.org>,
	Mark Rutland <mark.rutland@arm.com>,
	linux-pm@vger.kernel.org, devicetree@vger.kernel.org,
	linux-kernel@vger.kernel.org,
	Brian Norris <briannorris@chromium.org>,
	Douglas Anderson <dianders@chromium.org>
Subject: Re: [PATCH 09/11] misc: throttler: Add core support for non-thermal throttling
Date: Tue, 29 May 2018 14:30:47 -0700	[thread overview]
Message-ID: <20180529213047.GK168650@google.com> (raw)
In-Reply-To: <20180528080826.GA17162@kroah.com>

On Mon, May 28, 2018 at 10:08:26AM +0200, Greg Kroah-Hartman wrote:
> On Fri, May 25, 2018 at 01:30:41PM -0700, Matthias Kaehlcke wrote:
> > diff --git a/drivers/misc/Makefile b/drivers/misc/Makefile
> > index 20be70c3f118..01a1714dd2ad 100644
> > --- a/drivers/misc/Makefile
> > +++ b/drivers/misc/Makefile
> > @@ -57,3 +57,4 @@ obj-$(CONFIG_ASPEED_LPC_SNOOP)	+= aspeed-lpc-snoop.o
> >  obj-$(CONFIG_PCI_ENDPOINT_TEST)	+= pci_endpoint_test.o
> >  obj-$(CONFIG_OCXL)		+= ocxl/
> >  obj-$(CONFIG_MISC_RTSX)		+= cardreader/
> > +obj-y				+= throttler/
> 
> Shouldn't you depend on a Kconfig option to traverse into this
> directory?

Ack

> > diff --git a/drivers/misc/throttler/Kconfig b/drivers/misc/throttler/Kconfig
> > new file mode 100644
> > index 000000000000..ef8388f6bc0a
> > --- /dev/null
> > +++ b/drivers/misc/throttler/Kconfig
> > @@ -0,0 +1,13 @@
> > +menuconfig THROTTLER
> > +	bool "Throttler support"
> > +	default n
> 
> the default is always 'n' no need to say it again here :)

Will remove

> > +	depends on OF
> > +	select CPU_FREQ
> > +	select PM_DEVFREQ
> > +	help
> > +	  This option enables core support for non-thermal throttling of CPUs
> > +	  and devfreq devices.
> > +
> > +	  Note that you also need a event monitor module usually called
> > +	  *_throttler.
> > +
> > diff --git a/drivers/misc/throttler/Makefile b/drivers/misc/throttler/Makefile
> > new file mode 100644
> > index 000000000000..c8d920cee315
> > --- /dev/null
> > +++ b/drivers/misc/throttler/Makefile
> > @@ -0,0 +1 @@
> > +obj-$(CONFIG_THROTTLER)		+= core.o
> > diff --git a/drivers/misc/throttler/core.c b/drivers/misc/throttler/core.c
> > new file mode 100644
> > index 000000000000..c058d03212b8
> > --- /dev/null
> > +++ b/drivers/misc/throttler/core.c
> > @@ -0,0 +1,373 @@
> > +/*
> > + * Core code for non-thermal throttling
> > + *
> > + * Copyright (C) 2018 Google, Inc.
> > + *
> > + * This software is licensed under the terms of the GNU General Public
> > + * License version 2, as published by the Free Software Foundation, and
> > + * may be copied, distributed, and modified under those terms.
> > + *
> > + * This program is distributed in the hope that it will be useful,
> > + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> > + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> > + * GNU General Public License for more details.
> > + *
> > + */
> 
> Please just use a single SPDX line, like checkpatch.pl would have warned
> you about.  No need for the full verbous license boiler-plate text here
> at all.

Ok