From ef27bed1870dbd5fd363ff5ec51eebd5a695e277 Mon Sep 17 00:00:00 2001 From: "Rafael J. Wysocki" Date: Thu, 25 Aug 2011 15:34:01 +0200 Subject: 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 --- include/linux/pm.h | 3 +++ 1 file changed, 3 insertions(+) (limited to 'include/linux/pm.h') diff --git a/include/linux/pm.h b/include/linux/pm.h index bf5ee37388d..c6b5a0a41ab 100644 --- a/include/linux/pm.h +++ b/include/linux/pm.h @@ -423,6 +423,7 @@ struct wakeup_source; struct pm_subsys_data { spinlock_t lock; + unsigned int refcount; #ifdef CONFIG_PM_CLK struct list_head clock_list; #endif @@ -473,6 +474,8 @@ struct dev_pm_info { }; extern void update_pm_runtime_accounting(struct device *dev); +extern int dev_pm_get_subsys_data(struct device *dev); +extern int dev_pm_put_subsys_data(struct device *dev); /* * Power domains provide callbacks that are executed during system suspend, -- cgit v1.2.3