1. 13 Oct, 2008 1 commit
  2. 22 Jul, 2008 1 commit
  3. 21 Jul, 2008 3 commits
  4. 30 Apr, 2008 5 commits
  5. 05 Mar, 2008 1 commit
  6. 18 Oct, 2007 1 commit
    • Joe Perches's avatar
      Add missing newlines to some uses of dev_<level> messages · 898eb71c
      Joe Perches authored
      
      
      Found these while looking at printk uses.
      
      Add missing newlines to dev_<level> uses
      Add missing KERN_<level> prefixes to multiline dev_<level>s
      Fixed a wierd->weird spelling typo
      Added a newline to a printk
      
      Signed-off-by: default avatarJoe Perches <joe@perches.com>
      Cc: "Luck, Tony" <tony.luck@intel.com>
      Cc: Jens Axboe <jens.axboe@oracle.com>
      Cc: Mark M. Hoffman <mhoffman@lightlink.com>
      Cc: Roland Dreier <rolandd@cisco.com>
      Cc: Tilman Schmidt <tilman@imap.cc>
      Cc: David Woodhouse <dwmw2@infradead.org>
      Cc: Jeff Garzik <jeff@garzik.org>
      Cc: Stephen Hemminger <shemminger@linux-foundation.org>
      Cc: Greg KH <greg@kroah.com>
      Cc: Jeremy Fitzhardinge <jeremy@goop.org>
      Cc: Geert Uytterhoeven <geert@linux-m68k.org>
      Cc: Alessandro Zummo <a.zummo@towertech.it>
      Cc: David Brownell <david-b@pacbell.net>
      Cc: James Smart <James.Smart@Emulex.Com>
      Cc: Andrew Vasquez <andrew.vasquez@qlogic.com>
      Cc: "Antonino A. Daplas" <adaplas@pol.net>
      Cc: Evgeniy Polyakov <johnpol@2ka.mipt.ru>
      Cc: Russell King <rmk@arm.linux.org.uk>
      Cc: Jaroslav Kysela <perex@suse.cz>
      Cc: Takashi Iwai <tiwai@suse.de>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      898eb71c
  7. 17 Jul, 2007 3 commits
  8. 08 May, 2007 1 commit
  9. 11 Feb, 2007 7 commits
  10. 30 Dec, 2006 1 commit
  11. 08 Dec, 2006 11 commits
  12. 22 Nov, 2006 1 commit
  13. 15 Nov, 2006 1 commit
  14. 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
  15. 02 Oct, 2006 1 commit
    • Jeff Dike's avatar
      [PATCH] const struct tty_operations · b68e31d0
      Jeff Dike authored
      
      
      As part of an SMP cleanliness pass over UML, I consted a bunch of
      structures in order to not have to document their locking.  One of these
      structures was a struct tty_operations.  In order to const it in UML
      without introducing compiler complaints, the declaration of
      tty_set_operations needs to be changed, and then all of its callers need to
      be fixed.
      
      This patch declares all struct tty_operations in the tree as const.  In all
      cases, they are static and used only as input to tty_set_operations.  As an
      extra check, I ran an i386 allyesconfig build which produced no extra
      warnings.
      
      53 drivers are affected.  I checked the history of a bunch of them, and in
      most cases, there have been only a handful of maintenance changes in the
      last six months.  serial_core.c was the busiest one that I looked at.
      
      Signed-off-by: default avatarJeff Dike <jdike@addtoit.com>
      Acked-by: default avatarAlan Cox <alan@redhat.com>
      Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
      b68e31d0
  16. 01 Oct, 2006 1 commit