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  1. 30 3月, 2012 1 次提交
    • L
      x86: Remove the ancient and deprecated disable_hlt() and enable_hlt() facility · f6365201
      由 Len Brown 提交于 
      The X86_32-only disable_hlt/enable_hlt mechanism was used by the
32-bit floppy driver. Its effect was to replace the use of the
HLT instruction inside default_idle() with cpu_relax() - essentially
it turned off the use of HLT.

This workaround was commented in the code as:

 "disable hlt during certain critical i/o operations"

 "This halt magic was a workaround for ancient floppy DMA
  wreckage. It should be safe to remove."

H. Peter Anvin additionally adds:

 "To the best of my knowledge, no-hlt only existed because of
  flaky power distributions on 386/486 systems which were sold to
  run DOS.  Since DOS did no power management of any kind,
  including HLT, the power draw was fairly uniform; when exposed
  to the much hhigher noise levels you got when Linux used HLT
  caused some of these systems to fail.

  They were by far in the minority even back then."

Alan Cox further says:

 "Also for the Cyrix 5510 which tended to go castors up if a HLT
  occurred during a DMA cycle and on a few other boxes HLT during
  DMA tended to go astray.

  Do we care ? I doubt it. The 5510 was pretty obscure, the 5520
  fixed it, the 5530 is probably the oldest still in any kind of
  use."

So, let's finally drop this.
Signed-off-by: NLen Brown <len.brown@intel.com>
Signed-off-by: NJosh Boyer <jwboyer@redhat.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Acked-by: N"H. Peter Anvin" <hpa@zytor.com>
Acked-by: NAlan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Stephen Hemminger <shemminger@vyatta.com
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: <stable@kernel.org>
Link: http://lkml.kernel.org/n/tip-3rhk9bzf0x9rljkv488tloib@git.kernel.org
[ If anyone cares then alternative instruction patching could be
  used to replace HLT with a one-byte NOP instruction. Much simpler. ]
Signed-off-by: NIngo Molnar <mingo@kernel.org>
      f6365201
  3. 20 3月, 2012 1 次提交
  5. 17 3月, 2012 1 次提交
  7. 03 2月, 2012 1 次提交
  9. 20 1月, 2012 1 次提交
  11. 16 1月, 2012 1 次提交
  13. 07 1月, 2012 1 次提交
  15. 06 1月, 2012 4 次提交
  17. 27 12月, 2011 1 次提交
  19. 12 12月, 2011 1 次提交
  21. 10 12月, 2011 1 次提交
  23. 08 12月, 2011 1 次提交
  25. 03 11月, 2011 1 次提交
  27. 04 10月, 2011 1 次提交
  29. 24 9月, 2011 1 次提交
  31. 25 8月, 2011 1 次提交
  33. 06 8月, 2011 1 次提交
    • L
      acer-wmi: schedule threeg and interface sysfs for feature removal · 7b8aca65
      由 Lee, Chun-Yi 提交于 
      we can now autodetect internal 3G device and already have the threeg
rfkill device. So, we plan to remove threeg sysfs support for it's no
longer necessary.

We also plan to remove interface sysfs file that exposed which ACPI-WMI
interface that was used by acer-wmi driver. It will replaced by information
log when acer-wmi initial.

We keep it around for userspace compatibility reasons, schedule removal
in 2012.

Cc: Carlos Corbacho <carlos@strangeworlds.co.uk>
Cc: Matthew Garrett <mjg@redhat.com>
Cc: Dmitry Torokhov <dtor@mail.ru>
Cc: Corentin Chary <corentincj@iksaif.net>
Acked-by: NThomas Renninger <trenn@suse.de>
Signed-off-by: NLee, Chun-Yi <jlee@novell.com>
Signed-off-by: NMatthew Garrett <mjg@redhat.com>
      7b8aca65
  35. 03 8月, 2011 1 次提交
  37. 28 7月, 2011 1 次提交
  39. 27 7月, 2011 1 次提交
  41. 26 7月, 2011 2 次提交
  43. 16 7月, 2011 1 次提交
    • N
      nfsd: Remove deprecated nfsctl system call and related code. · 49b28684
      由 NeilBrown 提交于 
      As promised in feature-removal-schedule.txt it is time to
remove the nfsctl system call.

Userspace has perferred to not use this call throughout 2.6 and it has been
excluded in the default configuration since 2.6.36 (9 months ago).

So this patch removes all the code that was being compiled out.

There are still references to sys_nfsctl in various arch systemcall tables
and related code.  These should be cleaned out too, probably in the next
merge window.
Signed-off-by: NNeilBrown <neilb@suse.de>
Signed-off-by: NJ. Bruce Fields <bfields@redhat.com>
      49b28684
  45. 08 7月, 2011 1 次提交
  47. 07 7月, 2011 1 次提交
  49. 29 6月, 2011 1 次提交
  51. 27 6月, 2011 1 次提交
  53. 16 6月, 2011 2 次提交
  55. 29 5月, 2011 4 次提交
    • L
      x86 idle: deprecate mwait_idle() and "idle=mwait" cmdline param · 5d4c47e0
      由 Len Brown 提交于 
      mwait_idle() is a C1-only idle loop intended to be more efficient
than HLT on SMP hardware that supports it.

But mwait_idle() has been replaced by the more general
mwait_idle_with_hints(), which handles both C1 and deeper C-states.
ACPI uses only mwait_idle_with_hints(), and never uses mwait_idle().

Deprecate mwait_idle() and the "idle=mwait" cmdline param
to simplify the x86 idle code.

After this change, kernels configured with
(!CONFIG_ACPI=n && !CONFIG_INTEL_IDLE=n) when run on hardware
that support MWAIT will simply use HLT.  If MWAIT is desired
on those systems, cpuidle and the cpuidle drivers above
can be used.

cc: x86@kernel.org
cc: stable@kernel.org # .39.x
Signed-off-by: NLen Brown <len.brown@intel.com>
      5d4c47e0
    • L
      x86 idle: deprecate "no-hlt" cmdline param · cdaab4a0
      由 Len Brown 提交于 
      We'd rather that modern machines not check if HLT works on
every entry into idle, for the benefit of machines that had
marginal electricals 15-years ago.  If those machines are still running
the upstream kernel, they can use "idle=poll".  The only difference
will be that they'll now invoke HLT in machine_hlt().

cc: x86@kernel.org # .39.x
Signed-off-by: NLen Brown <len.brown@intel.com>
      cdaab4a0
    • L
      x86 idle APM: deprecate CONFIG_APM_CPU_IDLE · 99c63221
      由 Len Brown 提交于 
      We don't want to export the pm_idle function pointer to modules.
Currently CONFIG_APM_CPU_IDLE w/ CONFIG_APM_MODULE forces us to.

CONFIG_APM_CPU_IDLE is of dubious value, it runs only on 32-bit
uniprocessor laptops that are over 10 years old.  It calls into
the BIOS during idle, and is known to cause a number of machines
to fail.

Removing CONFIG_APM_CPU_IDLE and will allow us to stop exporting
pm_idle.  Any systems that were calling into the APM BIOS
at run-time will simply use HLT instead.

cc: x86@kernel.org
cc: Jiri Kosina <jkosina@suse.cz>
cc: stable@kernel.org # .39.x
Signed-off-by: NLen Brown <len.brown@intel.com>
      99c63221
    • L
      x86 idle floppy: deprecate disable_hlt() · 3b70b2e5
      由 Len Brown 提交于 
      Plan to remove floppy_disable_hlt in 2012, an ancient
workaround with comments that it should be removed.

This allows us to remove clutter and a run-time branch
from the idle code.

WARN_ONCE() on invocation until it is removed.

cc: x86@kernel.org
cc: stable@kernel.org # .39.x
Signed-off-by: NLen Brown <len.brown@intel.com>
      3b70b2e5
  57. 24 5月, 2011 1 次提交
  59. 20 5月, 2011 2 次提交
  61. 18 5月, 2011 1 次提交