1. 28 Apr, 2007 1 commit
  2. 25 Apr, 2007 1 commit
  3. 14 Feb, 2007 1 commit
  4. 07 Feb, 2007 1 commit
  5. 02 Jan, 2007 1 commit
  6. 13 Dec, 2006 1 commit
    • Robert P. J. Day's avatar
      [PATCH] getting rid of all casts of k[cmz]alloc() calls · 5cbded58
      Robert P. J. Day authored
      Run this:
      
      	#!/bin/sh
      	for f in $(grep -Erl "\([^\)]*\) *k[cmz]alloc" *) ; do
      	  echo "De-casting $f..."
      	  perl -pi -e "s/ ?= ?\([^\)]*\) *(k[cmz]alloc) *\(/ = \1\(/" $f
      	done
      
      And then go through and reinstate those cases where code is casting pointers
      to non-pointers.
      
      And then drop a few hunks which conflicted with outstanding work.
      
      Cc: Russell King <rmk@arm.linux.org.uk>, Ian Molton <spyro@f2s.com>
      Cc: Mikael Starvik <starvik@axis.com>
      Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
      Cc: Roman Zippel <zippel@linux-m68k.org>
      Cc: Geert Uytterhoeven <geert@linux-m68k.org>
      Cc: Ralf Baechle <ralf@linux-mips.org>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Kyle McMartin <kyle@mcmartin.ca>
      Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
      Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
      Cc: "David S. Miller" <davem@davemloft.net>
      Cc: Jeff Dike <jdike@addtoit.com>
      Cc: Greg KH <greg@kroah.com>
      Cc: Jens Axboe <jens.axboe@oracle.com>
      Cc: Paul Fulghum <paulkf@microgate.com>
      Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
      Cc: Karsten Keil <kkeil@suse.de>
      Cc: Mauro Carvalho Chehab <mchehab@infradead.org>
      Cc: Jeff Garzik <jeff@garzik.org>
      Cc: James Bottomley <James.Bottomley@steeleye.com>
      Cc: Ian Kent <raven@themaw.net>
      Cc: Steven French <sfrench@us.ibm.com>
      Cc: David Woodhouse <dwmw2@infradead.org>
      Cc: Neil Brown <neilb@cse.unsw.edu.au>
      Cc: Jaroslav Kysela <perex@suse.cz>
      Cc: Takashi Iwai <tiwai@suse.de>
      Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
      5cbded58
  7. 05 Dec, 2006 1 commit
  8. 01 Dec, 2006 3 commits
  9. 22 Nov, 2006 1 commit
  10. 05 Oct, 2006 1 commit
    • David Howells's avatar
      IRQ: Maintain regs pointer globally rather than passing to IRQ handlers · 7d12e780
      David Howells authored
      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: default avatarDavid Howells <dhowells@redhat.com>
      (cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)
      7d12e780
  11. 02 Oct, 2006 1 commit
    • Arnd Bergmann's avatar
      [PATCH] remove remaining errno and __KERNEL_SYSCALLS__ references · 135ab6ec
      Arnd Bergmann authored
      The last in-kernel user of errno is gone, so we should remove the definition
      and everything referring to it.  This also removes the now-unused lib/execve.c
      file that was introduced earlier.
      
      Also remove every trace of __KERNEL_SYSCALLS__ that still remained in the
      kernel.
      Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
      Cc: Andi Kleen <ak@muc.de>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
      Cc: Richard Henderson <rth@twiddle.net>
      Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
      Cc: Russell King <rmk@arm.linux.org.uk>
      Cc: Ian Molton <spyro@f2s.com>
      Cc: Mikael Starvik <starvik@axis.com>
      Cc: David Howells <dhowells@redhat.com>
      Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
      Cc: Hirokazu Takata <takata.hirokazu@renesas.com>
      Cc: Ralf Baechle <ralf@linux-mips.org>
      Cc: Kyle McMartin <kyle@mcmartin.ca>
      Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
      Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
      Cc: Paul Mundt <lethal@linux-sh.org>
      Cc: Kazumoto Kojima <kkojima@rr.iij4u.or.jp>
      Cc: Richard Curnow <rc@rc0.org.uk>
      Cc: William Lee Irwin III <wli@holomorphy.com>
      Cc: "David S. Miller" <davem@davemloft.net>
      Cc: Jeff Dike <jdike@addtoit.com>
      Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
      Cc: Miles Bader <uclinux-v850@lsi.nec.co.jp>
      Cc: Chris Zankel <chris@zankel.net>
      Cc: "Luck, Tony" <tony.luck@intel.com>
      Cc: Geert Uytterhoeven <geert@linux-m68k.org>
      Cc: Roman Zippel <zippel@linux-m68k.org>
      Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
      135ab6ec
  12. 01 Oct, 2006 2 commits
    • Jeff Garzik's avatar
      drivers/net/wireless/{airo,ipw2100}: fix error handling bugs · de897881
      Jeff Garzik authored
      airo:
      * fix oops, if !CONFIG_PROC_FS (create_proc_entry always returns NULL)
      
      * handle pci_register_driver() failure.  if it fails, we really do
        want to exit, rather than (as a comment indicates) return success
        because-we-are-a-library.
      
      * #if 0 have_isa_dev variable, which is assigned a value but never used
      
      ipw2100:
      * handle sysfs_create_group() failure
      
      * handle driver_create_file() failure
      Signed-off-by: default avatarJeff Garzik <jeff@garzik.org>
      de897881
    • Arjan van de Ven's avatar
      [PATCH] maximum latency tracking infrastructure · 5c87579e
      Arjan van de Ven authored
      Add infrastructure to track "maximum allowable latency" for power saving
      policies.
      
      The reason for adding this infrastructure is that power management in the
      idle loop needs to make a tradeoff between latency and power savings
      (deeper power save modes have a longer latency to running code again).  The
      code that today makes this tradeoff just does a rather simple algorithm;
      however this is not good enough: There are devices and use cases where a
      lower latency is required than that the higher power saving states provide.
       An example would be audio playback, but another example is the ipw2100
      wireless driver that right now has a very direct and ugly acpi hook to
      disable some higher power states randomly when it gets certain types of
      error.
      
      The proposed solution is to have an interface where drivers can
      
      * announce the maximum latency (in microseconds) that they can deal with
      * modify this latency
      * give up their constraint
      
      and a function where the code that decides on power saving strategy can
      query the current global desired maximum.
      
      This patch has a user of each side: on the consumer side, ACPI is patched
      to use this, on the producer side the ipw2100 driver is patched.
      
      A generic maximum latency is also registered of 2 timer ticks (more and you
      lose accurate time tracking after all).
      
      While the existing users of the patch are x86 specific, the infrastructure
      is not.  I'd like to ask the arch maintainers of other architectures if the
      infrastructure is generic enough for their use (assuming the architecture
      has such a tradeoff as concept at all), and the sound/multimedia driver
      owners to look at the driver facing API to see if this is something they
      can use.
      
      [akpm@osdl.org: cleanups]
      Signed-off-by: default avatarArjan van de Ven <arjan@linux.intel.com>
      Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      Acked-by: default avatarJesse Barnes <jesse.barnes@intel.com>
      Cc: "Brown, Len" <len.brown@intel.com>
      Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
      5c87579e
  13. 25 Sep, 2006 1 commit
  14. 13 Sep, 2006 1 commit
  15. 29 Aug, 2006 1 commit
  16. 19 Aug, 2006 1 commit
  17. 02 Jul, 2006 1 commit
  18. 30 Jun, 2006 2 commits
  19. 26 Jun, 2006 1 commit
  20. 17 Mar, 2006 6 commits
  21. 30 Jan, 2006 8 commits
  22. 16 Jan, 2006 1 commit
  23. 14 Jan, 2006 1 commit
  24. 09 Jan, 2006 1 commit