On Wednesday 16 August 2006 4:57 am, Pavel Machek wrote:
> > Add a new PM_SYSFS_DEPRECATED config option to control whether or
> > not the /sys/devices/.../power/state files are provided. ...
>
> Looks good to me, ACK.
>
> (And sorry for long delay).
Greg still hasn't merged it; so, no prob. :)
I updated patch 2/2 so that it doesn't test for the problematic and
incomplete prepare_suspend() method, and to remove prepare_suspend().
(That removal was discussed separately.)
> I guess this should go with it...? OTOH andrew wanted alternative,
> first, before removing the feature... but it is unclear to me if we
> want the feature at all on the production system, so...
How about this one instead? The issue is not limited to that sysfs
file and its use of PM_EVENT_* codes, that's just the most visible
facet of the problem.
- Dave
Index: o26/Documentation/feature-removal-schedule.txt
===================================================================
--- o26.orig/Documentation/feature-removal-schedule.txt 2006-07-30 22:08:10.000000000 -0700
+++ o26/Documentation/feature-removal-schedule.txt 2006-08-16 11:34:54.000000000 -0700
@@ -6,6 +6,21 @@ be removed from this file.
---------------------------
+What: /sys/devices/.../power/state
+ dev->power.power_state
+ dpm_runtime_{suspend,resume)()
+When: July 2007
+Why: Broken design for runtime control over driver power states, confusing
+ driver-internal runtime power management with: mechanisms to support
+ system-wide sleep state transitions; event codes that distinguish
+ different phases of swsusp "sleep" transitions; and userspace policy
+ inputs. This framework was never widely used, and most attempts to
+ use it were broken. Drivers should instead be exposing domain-specific
+ interfaces either to kernel or to userspace, iff they are even needed.
+Who: Pavel Machek <pavel at suse.cz>
+
+---------------------------
+
What: RAW driver (CONFIG_RAW_DRIVER)
When: December 2005
Why: declared obsolete since kernel 2.6.3
