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authorAlan Stern <stern@rowland.harvard.edu>2010-09-26 01:35:15 +0400
committerRafael J. Wysocki <rjw@sisk.pl>2010-10-17 03:57:47 +0400
commit7490e44239e60293bca0c2663229050c36c660c2 (patch)
tree938cd1cafba133f2d47c648ac01242de841d6d1b /drivers/base/power/power.h
parent140a6c945211ee911dec776fafa52e03a7d7bb9a (diff)
downloadlinux-7490e44239e60293bca0c2663229050c36c660c2.tar.xz
PM / Runtime: Add no_callbacks flag
Some devices, such as USB interfaces, cannot be power-managed independently of their parents, i.e., they cannot be put in low power while the parent remains at full power. This patch (as1425) creates a new "no_callbacks" flag, which tells the PM core not to invoke the runtime-PM callback routines for the such devices but instead to assume that the callbacks always succeed. In addition, the non-debugging runtime-PM sysfs attributes for the devices are removed, since they are pretty much meaningless. The advantage of this scheme comes not so much from avoiding the callbacks themselves, but rather from the fact that without the need for a process context in which to run the callbacks, more work can be done in interrupt context. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Diffstat (limited to 'drivers/base/power/power.h')
-rw-r--r--drivers/base/power/power.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/base/power/power.h b/drivers/base/power/power.h
index 8b2745c69e2a..698dde742587 100644
--- a/drivers/base/power/power.h
+++ b/drivers/base/power/power.h
@@ -60,6 +60,7 @@ static inline void device_pm_move_last(struct device *dev) {}
extern int dpm_sysfs_add(struct device *);
extern void dpm_sysfs_remove(struct device *);
+extern void rpm_sysfs_remove(struct device *);
#else /* CONFIG_PM */