linux-kernel - [PATCH v2 0/2] clocksource: don't suspend/resume when unused

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Message-Id: <1421427439-11699-1-git-send-email-alexandre.belloni@free-electrons.com>
Date:	Fri, 16 Jan 2015 17:57:17 +0100
From:	Alexandre Belloni <alexandre.belloni@...e-electrons.com>
To:	Thomas Gleixner <tglx@...utronix.de>
Cc:	John Stultz <john.stultz@...aro.org>,
	Daniel Lezcano <daniel.lezcano@...aro.org>,
	Nicolas Ferre <nicolas.ferre@...el.com>,
	Boris Brezillon <boris.brezillon@...e-electrons.com>,
	Russell King - ARM Linux <linux@....linux.org.uk>,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	Alexandre Belloni <alexandre.belloni@...e-electrons.com>
Subject: [PATCH v2 0/2] clocksource: don't suspend/resume when unused

This is a quite naive implementation to track whether a clocksource is enabled.
I chose not to add a member in struct clocksource and use a flag instead.

I found that timekeeping.c is the only consumer for clocksource and I converted
it to use clocksource_enable and clocksource_disable.

Changes in v2:
 - removed the check on enable in timekeeping.c to ensure all clocksources are
   going through clocksource_enable
 - rework clocksource_enable to set CLOCK_SOURCE_USED when enable is successful
   if present

Alexandre Belloni (2):
  clocksource: track usage
  clocksource: don't suspend/resume when unused

 include/linux/clocksource.h |  4 ++++
 kernel/time/clocksource.c   | 34 ++++++++++++++++++++++++++++++++--
 kernel/time/timekeeping.c   |  8 +++-----
 3 files changed, 39 insertions(+), 7 deletions(-)

-- 
2.1.0

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