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Message-ID: <20150722205735.GP2853@piout.net>
Date: Wed, 22 Jul 2015 22:57:35 +0200
From: Alexandre Belloni <alexandre.belloni@...e-electrons.com>
To: Dmitry Torokhov <dmitry.torokhov@...il.com>
Cc: Krzysztof Kozlowski <k.kozlowski@...sung.com>,
rtc-linux@...glegroups.com,
Alessandro Zummo <a.zummo@...ertech.it>,
linux-kernel@...r.kernel.org
Subject: Re: [rtc-linux] [PATCH 4/4] RTC: switch to using is_visible() to
control sysfs attributes
(Krzysztof, be careful, Dmitry was not in copy of your maili, you should
probably check your mailer config)
On 21/07/2015 at 10:21:11 +0900, Krzysztof Kozlowski wrote :
> 2015-07-21 8:02 GMT+09:00 Dmitry Torokhov <dmitry.torokhov@...il.com>:
> > static ssize_t
> > -rtc_sysfs_set_wakealarm(struct device *dev, struct device_attribute *attr,
> > +wakealarm_store(struct device *dev, struct device_attribute *attr,
> > const char *buf, size_t n)
> > {
> > ssize_t retval;
> > @@ -221,45 +209,58 @@ rtc_sysfs_set_wakealarm(struct device *dev, struct device_attribute *attr,
> > retval = rtc_set_alarm(rtc, &alm);
> > return (retval < 0) ? retval : n;
> > }
> > -static DEVICE_ATTR(wakealarm, S_IRUGO | S_IWUSR,
> > - rtc_sysfs_show_wakealarm, rtc_sysfs_set_wakealarm);
> > +static DEVICE_ATTR_RW(wakealarm);
>
> This and renaming of show/store functions look unrelated
>
I don't really mind that one but I would also prefer if it could be
separated.
> >
> > +static struct attribute *rtc_attrs[] = {
> > + &dev_attr_name.attr,
> > + &dev_attr_date.attr,
> > + &dev_attr_time.attr,
> > + &dev_attr_since_epoch.attr,
> > + &dev_attr_max_user_freq.attr,
> > + &dev_attr_hctosys.attr,
> > + &dev_attr_wakealarm.attr,
> > + NULL,
> > +};
> >
> > -/* The reason to trigger an alarm with no process watching it (via sysfs)
> > +/*
> > + * The reason to trigger an alarm with no process watching it (via sysfs)
> > * is its side effect: waking from a system state like suspend-to-RAM or
> > * suspend-to-disk. So: no attribute unless that side effect is possible.
> > * (Userspace may disable that mechanism later.)
> > */
> > -static inline int rtc_does_wakealarm(struct rtc_device *rtc)
> > +static bool rtc_does_wakealarm(struct rtc_device *rtc)
> > {
> > if (!device_can_wakeup(rtc->dev.parent))
> > - return 0;
> > + return false;
> > +
> > return rtc->ops->set_alarm != NULL;
> > }
>
> This looks unrelated too and confuses me. Could you split such cleanup
> from main goal of the patch?
>
That one is bothering me too.
--
Alexandre Belloni, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com
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