Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wirel...

[pandora-kernel.git] / Documentation / feature-removal-schedule.txt

diff --git a/Documentation/feature-removal-schedule.txt b/Documentation/feature-removal-schedule.txt
index ff31b1c..72e2384 100644 (file)
--- a/Documentation/feature-removal-schedule.txt
+++ b/Documentation/feature-removal-schedule.txt
@@ -6,6 +6,42 @@ be removed from this file.
 
 ---------------------------
 
+What:  x86 floppy disable_hlt
+When:  2012
+Why:   ancient workaround of dubious utility clutters the
+       code used by everybody else.
+Who:   Len Brown <len.brown@intel.com>
+
+---------------------------
+
+What:  CONFIG_APM_CPU_IDLE, and its ability to call APM BIOS in idle
+When:  2012
+Why:   This optional sub-feature of APM is of dubious reliability,
+       and ancient APM laptops are likely better served by calling HLT.
+       Deleting CONFIG_APM_CPU_IDLE allows x86 to stop exporting
+       the pm_idle function pointer to modules.
+Who:   Len Brown <len.brown@intel.com>
+
+----------------------------
+
+What:  x86_32 "no-hlt" cmdline param
+When:  2012
+Why:   remove a branch from idle path, simplify code used by everybody.
+       This option disabled the use of HLT in idle and machine_halt()
+       for hardware that was flakey 15-years ago.  Today we have
+       "idle=poll" that removed HLT from idle, and so if such a machine
+       is still running the upstream kernel, "idle=poll" is likely sufficient.
+Who:   Len Brown <len.brown@intel.com>
+
+----------------------------
+
+What:  x86 "idle=mwait" cmdline param
+When:  2012
+Why:   simplify x86 idle code
+Who:   Len Brown <len.brown@intel.com>
+
+----------------------------
+
 What:  PRISM54
 When:  2.6.34
 
@@ -445,23 +481,6 @@ Who:       FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
 
 ----------------------------
 
-What:   namespace cgroup (ns_cgroup)
-When:   2.6.38
-Why:    The ns_cgroup leads to some problems:
-       * cgroup creation is out-of-control
-       * cgroup name can conflict when pids are looping
-       * it is not possible to have a single process handling
-       a lot of namespaces without falling in a exponential creation time
-       * we may want to create a namespace without creating a cgroup
-
-       The ns_cgroup is replaced by a compatibility flag 'clone_children',
-       where a newly created cgroup will copy the parent cgroup values.
-       The userspace has to manually create a cgroup and add a task to
-       the 'tasks' file.
-Who:    Daniel Lezcano <daniel.lezcano@free.fr>
-
-----------------------------
-
 What:  iwlwifi disable_hw_scan module parameters
 When:  2.6.40
 Why:   Hareware scan is the prefer method for iwlwifi devices for