Re: [PATCH 2/4] PM: Reference counting of power.subsys_data

Since the power.subsys_data device field will be used by multiple
filesystems, introduce a reference counting mechanism for it to avoid
freeing it prematurely or changing its value at a wrong time.

Make the PM clocks management code that currently is the only user of
power.subsys_data use the new reference counting.

Signed-off-by: Rafael J. Wysocki <redacted>
---
 drivers/base/power/Makefile    |    2 
 drivers/base/power/clock_ops.c |   24 ++---------
 drivers/base/power/common.c    |   86 +++++++++++++++++++++++++++++++++++++++++
 include/linux/pm.h             |    3 +
 4 files changed, 95 insertions(+), 20 deletions(-)

Index: linux-2.6/drivers/base/power/common.c
=================================> --- /dev/null

+++ linux-2.6/drivers/base/power/common.c

@@ -0,0 +1,86 @@
+/*
+ * drivers/base/power/common.c - Common device power management code.
+ *
+ * Copyright (C) 2011 Rafael J. Wysocki <rjw@sisk.pl>, Renesas Electronics Corp.