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  1. 27 7月, 2009 1 次提交
  3. 08 7月, 2009 1 次提交
  5. 10 5月, 2009 1 次提交
  7. 12 4月, 2009 1 次提交
  9. 17 6月, 2008 1 次提交
  11. 27 5月, 2008 1 次提交
  13. 14 3月, 2008 1 次提交
  15. 06 2月, 2008 1 次提交
  17. 21 1月, 2008 3 次提交
  19. 22 10月, 2007 1 次提交
  21. 05 9月, 2007 1 次提交
  23. 30 8月, 2007 1 次提交
  25. 18 7月, 2007 1 次提交
  27. 08 5月, 2007 1 次提交
  29. 12 4月, 2007 1 次提交
  31. 08 3月, 2007 1 次提交
  33. 18 2月, 2007 2 次提交
  35. 10 2月, 2007 1 次提交
  37. 18 1月, 2007 1 次提交
  39. 17 11月, 2006 1 次提交
    • D
      Input: i8042 - fix shutdown issue on some boxes with active MUXes · a216a4b6
      由 Dmitry Torokhov 提交于 
      MUX error handling has a workaround for KBCs that get confused which
port data came from and signal MUXERR while data is actually good.
Unfortunately this workaround hurts with KBCs that signal timeouts
as 0xfc (spec says that only 0xfd, 0xfe and 0xff are alowed with
MUXERR) since it causes endless attempts to rescan i8042 serio
ports. The solution is to treat 0xfc as timeout (0xfe).
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>
      a216a4b6
  41. 03 11月, 2006 1 次提交
  43. 11 10月, 2006 1 次提交
  45. 05 10月, 2006 1 次提交
    • D
      IRQ: Maintain regs pointer globally rather than passing to IRQ handlers · 7d12e780
      由 David Howells 提交于 
      Maintain a per-CPU global "struct pt_regs *" variable which can be used instead
of passing regs around manually through all ~1800 interrupt handlers in the
Linux kernel.

The regs pointer is used in few places, but it potentially costs both stack
space and code to pass it around.  On the FRV arch, removing the regs parameter
from all the genirq function results in a 20% speed up of the IRQ exit path
(ie: from leaving timer_interrupt() to leaving do_IRQ()).

Where appropriate, an arch may override the generic storage facility and do
something different with the variable.  On FRV, for instance, the address is
maintained in GR28 at all times inside the kernel as part of general exception
handling.

Having looked over the code, it appears that the parameter may be handed down
through up to twenty or so layers of functions.  Consider a USB character
device attached to a USB hub, attached to a USB controller that posts its
interrupts through a cascaded auxiliary interrupt controller.  A character
device driver may want to pass regs to the sysrq handler through the input
layer which adds another few layers of parameter passing.

I've build this code with allyesconfig for x86_64 and i386.  I've runtested the
main part of the code on FRV and i386, though I can't test most of the drivers.
I've also done partial conversion for powerpc and MIPS - these at least compile
with minimal configurations.

This will affect all archs.  Mostly the changes should be relatively easy.
Take do_IRQ(), store the regs pointer at the beginning, saving the old one:

	struct pt_regs *old_regs = set_irq_regs(regs);

And put the old one back at the end:

	set_irq_regs(old_regs);

Don't pass regs through to generic_handle_irq() or __do_IRQ().

In timer_interrupt(), this sort of change will be necessary:

	-	update_process_times(user_mode(regs));
	-	profile_tick(CPU_PROFILING, regs);
	+	update_process_times(user_mode(get_irq_regs()));
	+	profile_tick(CPU_PROFILING);

I'd like to move update_process_times()'s use of get_irq_regs() into itself,
except that i386, alone of the archs, uses something other than user_mode().

Some notes on the interrupt handling in the drivers:

 (*) input_dev() is now gone entirely.  The regs pointer is no longer stored in
     the input_dev struct.

 (*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking.  It does
     something different depending on whether it's been supplied with a regs
     pointer or not.

 (*) Various IRQ handler function pointers have been moved to type
     irq_handler_t.
Signed-Off-By: NDavid Howells <dhowells@redhat.com>
(cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)
      7d12e780
  47. 11 9月, 2006 1 次提交
  49. 03 7月, 2006 1 次提交
  51. 01 7月, 2006 1 次提交
  53. 28 12月, 2005 1 次提交
  55. 10 11月, 2005 1 次提交
  57. 30 10月, 2005 1 次提交
  59. 29 10月, 2005 1 次提交
  61. 11 9月, 2005 1 次提交
  63. 04 9月, 2005 3 次提交
  65. 15 7月, 2005 1 次提交
  67. 26 6月, 2005 1 次提交
    • P
      [PATCH] RCU: clean up a few remaining synchronize_kernel() calls · b2b18660
      由 Paul E. McKenney 提交于 
      2.6.12-rc6-mm1 has a few remaining synchronize_kernel()s, some (but not
all) in comments.  This patch changes these synchronize_kernel() calls (and
comments) to synchronize_rcu() or synchronize_sched() as follows:

- arch/x86_64/kernel/mce.c mce_read(): change to synchronize_sched() to
  handle races with machine-check exceptions (synchronize_rcu() would not cut
  it given RCU implementations intended for hardcore realtime use.

- drivers/input/serio/i8042.c i8042_stop(): change to synchronize_sched() to
  handle races with i8042_interrupt() interrupt handler.  Again,
  synchronize_rcu() would not cut it given RCU implementations intended for
  hardcore realtime use.

- include/*/kdebug.h comments: change to synchronize_sched() to handle races
  with NMIs.  As before, synchronize_rcu() would not cut it...

- include/linux/list.h comment: change to synchronize_rcu(), since this
  comment is for list_del_rcu().

- security/keys/key.c unregister_key_type(): change to synchronize_rcu(),
  since this is interacting with RCU read side.

- security/keys/process_keys.c install_session_keyring(): change to
  synchronize_rcu(), since this is interacting with RCU read side.
Signed-off-by: N"Paul E. McKenney" <paulmck@us.ibm.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
      b2b18660
  69. 28 5月, 2005 1 次提交