[CPUFREQ] Mark policy_rwsem as going static in cpufreq.c wont be exported
lock_policy_rwsem_* and unlock_policy_rwsem_* routines in cpufreq.c are
currently exported to drivers. Improper use of those locks can
result in deadlocks and it is better to keep the locks localized.
Two previous in-kernel users of these interfaces (ondemand and conservative),
do not use this interfaces any more. Schedule them for removal.
Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Dave Jones <davej@redhat.com>
diff --git a/Documentation/feature-removal-schedule.txt b/Documentation/feature-removal-schedule.txt
index f8cd450..09e031c 100644
--- a/Documentation/feature-removal-schedule.txt
+++ b/Documentation/feature-removal-schedule.txt
@@ -458,3 +458,13 @@
but the old version has been kept around for easier testing. Note this
doesn't impact the old P5 and WinChip machine check handlers.
Who: Andi Kleen <andi@firstfloor.org>
+
+----------------------------
+
+What: lock_policy_rwsem_* and unlock_policy_rwsem_* will not be
+ exported interface anymore.
+When: 2.6.33
+Why: cpu_policy_rwsem has a new cleaner definition making it local to
+ cpufreq core and contained inside cpufreq.c. Other dependent
+ drivers should not use it in order to safely avoid lockdep issues.
+Who: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>