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authorAlan Stern <stern@rowland.harvard.edu>2010-09-25 23:34:54 +0200
committerRafael J. Wysocki <rjw@sisk.pl>2010-10-17 01:57:44 +0200
commit3f9af0513ae5b1f185302c2d0ba656640926d970 (patch)
tree5f99b98aca875a812f444721a88a3fc3de842538 /include/linux/pm_runtime.h
parent4769373ca2c8d0b999749a070c48fd8648888831 (diff)
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PM / Runtime: Replace boolean arguments with bitflags
The "from_wq" argument in __pm_runtime_suspend() and __pm_runtime_resume() supposedly indicates whether or not the function was called by the PM workqueue thread, but in fact it isn't always used this way. It really indicates whether or not the function should return early if the requested operation is already in progress. Along with this badly-named boolean argument, later patches in this series will add several other boolean arguments to these functions and others. Therefore this patch (as1422) begins the conversion process by replacing from_wq with a bitflag argument. The same bitflags are also used in __pm_runtime_get() and __pm_runtime_put(), where they indicate whether or not the operation should be asynchronous. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Diffstat (limited to 'include/linux/pm_runtime.h')
-rw-r--r--include/linux/pm_runtime.h23
1 files changed, 15 insertions, 8 deletions
diff --git a/include/linux/pm_runtime.h b/include/linux/pm_runtime.h
index 6e81888c6222..c030cac59aac 100644
--- a/include/linux/pm_runtime.h
+++ b/include/linux/pm_runtime.h
@@ -12,6 +12,11 @@
#include <linux/device.h>
#include <linux/pm.h>
+/* Runtime PM flag argument bits */
+#define RPM_ASYNC 0x01 /* Request is asynchronous */
+#define RPM_NOWAIT 0x02 /* Don't wait for concurrent
+ state change */
+
#ifdef CONFIG_PM_RUNTIME
extern struct workqueue_struct *pm_wq;
@@ -22,8 +27,8 @@ extern int pm_runtime_resume(struct device *dev);
extern int pm_request_idle(struct device *dev);
extern int pm_schedule_suspend(struct device *dev, unsigned int delay);
extern int pm_request_resume(struct device *dev);
-extern int __pm_runtime_get(struct device *dev, bool sync);
-extern int __pm_runtime_put(struct device *dev, bool sync);
+extern int __pm_runtime_get(struct device *dev, int rpmflags);
+extern int __pm_runtime_put(struct device *dev, int rpmflags);
extern int __pm_runtime_set_status(struct device *dev, unsigned int status);
extern int pm_runtime_barrier(struct device *dev);
extern void pm_runtime_enable(struct device *dev);
@@ -81,8 +86,10 @@ static inline int pm_schedule_suspend(struct device *dev, unsigned int delay)
return -ENOSYS;
}
static inline int pm_request_resume(struct device *dev) { return 0; }
-static inline int __pm_runtime_get(struct device *dev, bool sync) { return 1; }
-static inline int __pm_runtime_put(struct device *dev, bool sync) { return 0; }
+static inline int __pm_runtime_get(struct device *dev, int rpmflags)
+ { return 1; }
+static inline int __pm_runtime_put(struct device *dev, int rpmflags)
+ { return 0; }
static inline int __pm_runtime_set_status(struct device *dev,
unsigned int status) { return 0; }
static inline int pm_runtime_barrier(struct device *dev) { return 0; }
@@ -107,22 +114,22 @@ static inline int pm_generic_runtime_resume(struct device *dev) { return 0; }
static inline int pm_runtime_get(struct device *dev)
{
- return __pm_runtime_get(dev, false);
+ return __pm_runtime_get(dev, RPM_ASYNC);
}
static inline int pm_runtime_get_sync(struct device *dev)
{
- return __pm_runtime_get(dev, true);
+ return __pm_runtime_get(dev, 0);
}
static inline int pm_runtime_put(struct device *dev)
{
- return __pm_runtime_put(dev, false);
+ return __pm_runtime_put(dev, RPM_ASYNC);
}
static inline int pm_runtime_put_sync(struct device *dev)
{
- return __pm_runtime_put(dev, true);
+ return __pm_runtime_put(dev, 0);
}
static inline int pm_runtime_set_active(struct device *dev)