linux-kernel - Re: [PATCH v5] PM / wakeup: show wakeup sources stats in sysfs

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Date:   Wed, 31 Jul 2019 19:17:20 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Stephen Boyd <swboyd@...omium.org>
Cc:     "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Tri Vo <trong@...roid.com>,
        Viresh Kumar <viresh.kumar@...aro.org>,
        Hridya Valsaraju <hridya@...gle.com>,
        Sandeep Patil <sspatil@...gle.com>,
        Kalesh Singh <kaleshsingh@...gle.com>,
        Ravi Chandra Sadineni <ravisadineni@...omium.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux PM <linux-pm@...r.kernel.org>,
        "Cc: Android Kernel" <kernel-team@...roid.com>,
        kbuild test robot <lkp@...el.com>
Subject: Re: [PATCH v5] PM / wakeup: show wakeup sources stats in sysfs

On Wed, Jul 31, 2019 at 10:13:57AM -0700, Stephen Boyd wrote:
> Quoting Rafael J. Wysocki (2019-07-31 04:58:36)
> > On Wednesday, July 31, 2019 10:34:11 AM CEST Rafael J. Wysocki wrote:
> > > On Wed, Jul 31, 2019 at 1:41 AM Stephen Boyd <swboyd@...omium.org> wrote:
> > > >
> > > 
> > > > We can run into the same problem when two buses name their devices the
> > > > same name and then we attempt to attach a wakeup source to those two
> > > > devices. Or we can have a problem where a virtual wakeup is made with
> > > > the same name, and again we'll try to make a duplicate named device.
> > > > Using something like 'event' or 'wakeup' or 'ws' as the prefix avoids this
> > > > problem and keeps things clean.
> > > 
> > > Or suffix, like "<devname-wakeup>.
> > > 
> > > But if prefixes are used by an existing convention, I would prefer
> > > "ws-" as it is concise enough and should not be confusing.
> 
> Another possibility is 'eventN', so it reads as /sys/class/wakeup/event0

"eventX" is a prefix already used by the input subsystem, so you might
run into conflicts here :(

"wakeupX" makes sense, no namespace colisions there at all.

thanks,

greg k-h