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| author | Rafael J. Wysocki <rjw@sisk.pl> | 2011-08-25 15:34:01 +0200 |
|---|---|---|
| committer | Rafael J. Wysocki <rjw@sisk.pl> | 2011-08-25 15:34:01 +0200 |
| commit | ef27bed1870dbd5fd363ff5ec51eebd5a695e277 (patch) | |
| tree | ef563bb07f259386fbe2477ec9a01e7ead011bcc /include/linux/pm.h | |
| parent | 5c095a0e0d600d5a5a4207eaadabd18db46395ce (diff) | |
| download | linux-ef27bed1870dbd5fd363ff5ec51eebd5a695e277.tar.gz linux-ef27bed1870dbd5fd363ff5ec51eebd5a695e277.tar.bz2 linux-ef27bed1870dbd5fd363ff5ec51eebd5a695e277.zip | |
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 <rjw@sisk.pl>
Diffstat (limited to 'include/linux/pm.h')
| -rw-r--r-- | include/linux/pm.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/pm.h b/include/linux/pm.h index bf5ee37388d4..c6b5a0a41ab3 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, |