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  1. 28 Jan, 2012 1 commit
  2. 11 Jan, 2012 1 commit
  3. 11 Nov, 2011 3 commits
  4. 31 Oct, 2011 1 commit
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  9. 31 Mar, 2011 1 commit
  10. 23 Mar, 2011 1 commit
    • Matthew Garrett's avatar
      backlight: add backlight type · bb7ca747
      Matthew Garrett authored
      There may be multiple ways of controlling the backlight on a given
      machine.  Allow drivers to expose the type of interface they are
      providing, making it possible for userspace to make appropriate policy
      decisions.
      Signed-off-by: default avatarMatthew Garrett <mjg@redhat.com>
      Cc: Richard Purdie <rpurdie@rpsys.net>
      Cc: Chris Wilson <chris@chris-wilson.co.uk>
      Cc: David Airlie <airlied@linux.ie>
      Cc: Alex Deucher <alexdeucher@gmail.com>
      Cc: Ben Skeggs <bskeggs@redhat.com>
      Cc: Zhang Rui <rui.zhang@intel.com>
      Cc: Len Brown <lenb@kernel.org>
      Cc: Jesse Barnes <jbarnes@virtuousgeek.org>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      bb7ca747
  11. 22 Mar, 2011 2 commits
  12. 16 Nov, 2010 1 commit
  13. 30 Mar, 2010 1 commit
    • Tejun Heo's avatar
      include cleanup: Update gfp.h and slab.h includes to prepare for breaking... · 5a0e3ad6
      Tejun Heo authored
      include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
      
      percpu.h is included by sched.h and module.h and thus ends up being
      included when building most .c files.  percpu.h includes slab.h which
      in turn includes gfp.h making everything defined by the two files
      universally available and complicating inclusion dependencies.
      
      percpu.h -> slab.h dependency is about to be removed.  Prepare for
      this change by updating users of gfp and slab facilities include those
      headers directly instead of assuming availability.  As this conversion
      needs to touch large number of source files, the following script is
      used as the basis of conversion.
      
        http://userweb.kernel.org/~tj/misc/slabh-sweep.py
      
      The script does the followings.
      
      * Scan files for gfp and slab usages and update includes such that
        only the necessary includes are there.  ie. if only gfp is used,
        gfp.h, if slab is used, slab.h.
      
      * When the script inserts a new include, it looks at the include
        blocks and try to put the new include such that its order conforms
        to its surrounding.  It's put in the include block which contains
        core kernel includes, in the same order that the rest are ordered -
        alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
        doesn't seem to be any matching order.
      
      * If the script can't find a place to put a new include (mostly
        because the file doesn't have fitting include block), it prints out
        an error message indicating which .h file needs to be added to the
        file.
      
      The conversion was done in the following steps.
      
      1. The initial automatic conversion of all .c files updated slightly
         over 4000 files, deleting around 700 includes and adding ~480 gfp.h
         and ~3000 slab.h inclusions.  The script emitted errors for ~400
         files.
      
      2. Each error was manually checked.  Some didn't need the inclusion,
         some needed manual addition while adding it to implementation .h or
         embedding .c file was more appropriate for others.  This step added
         inclusions to around 150 files.
      
      3. The script was run again and the output was compared to the edits
         from #2 to make sure no file was left behind.
      
      4. Several build tests were done and a couple of problems were fixed.
         e.g. lib/decompress_*.c used malloc/free() wrappers around slab
         APIs requiring slab.h to be added manually.
      
      5. The script was run on all .h files but without automatically
         editing them as sprinkling gfp.h and slab.h inclusions around .h
         files could easily lead to inclusion dependency hell.  Most gfp.h
         inclusion directives were ignored as stuff from gfp.h was usually
         wildly available and often used in preprocessor macros.  Each
         slab.h inclusion directive was examined and added manually as
         necessary.
      
      6. percpu.h was updated not to include slab.h.
      
      7. Build test were done on the following configurations and failures
         were fixed.  CONFIG_GCOV_KERNEL was turned off for all tests (as my
         distributed build env didn't work with gcov compiles) and a few
         more options had to be turned off depending on archs to make things
         build (like ipr on powerpc/64 which failed due to missing writeq).
      
         * x86 and x86_64 UP and SMP allmodconfig and a custom test config.
         * powerpc and powerpc64 SMP allmodconfig
         * sparc and sparc64 SMP allmodconfig
         * ia64 SMP allmodconfig
         * s390 SMP allmodconfig
         * alpha SMP allmodconfig
         * um on x86_64 SMP allmodconfig
      
      8. percpu.h modifications were reverted so that it could be applied as
         a separate patch and serve as bisection point.
      
      Given the fact that I had only a couple of failures from tests on step
      6, I'm fairly confident about the coverage of this conversion patch.
      If there is a breakage, it's likely to be something in one of the arch
      headers which should be easily discoverable easily on most builds of
      the specific arch.
      Signed-off-by: default avatarTejun Heo <tj@kernel.org>
      Guess-its-ok-by: default avatarChristoph Lameter <cl@linux-foundation.org>
      Cc: Ingo Molnar <mingo@redhat.com>
      Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
      5a0e3ad6
  14. 16 Mar, 2010 1 commit
  15. 12 Nov, 2009 1 commit
  16. 09 Nov, 2009 1 commit
  17. 23 Jul, 2009 1 commit
  18. 08 Jul, 2009 1 commit
  19. 01 Jul, 2009 1 commit
    • Krzysztof Helt's avatar
      fbdev: add mutex for fb_mmap locking · 537a1bf0
      Krzysztof Helt authored
      Add a mutex to avoid a circular locking problem between the mm layer
      semaphore and fbdev ioctl mutex through the fb_mmap() call.
      
      Also, add mutex to all places where smem_start and smem_len fields change
      so the mutex inside the fb_mmap() is actually used.  Changing of these
      fields before calling the framebuffer_register() are not mutexed.
      
      This is 2.6.31 material.  It removes one lockdep (fb_mmap() and
      register_framebuffer()) but there is still another one (fb_release() and
      register_framebuffer()).  It also cleans up handling of the smem_start and
      smem_len fields used by mutexed section of the fb_mmap().
      Signed-off-by: default avatarKrzysztof Helt <krzysztof.h1@wp.pl>
      Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
      Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
      Cc: <stable@kernel.org>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      537a1bf0
  20. 17 Jun, 2009 1 commit
  21. 29 May, 2009 1 commit
  22. 20 Nov, 2008 1 commit
  23. 16 Oct, 2008 1 commit
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  25. 13 Sep, 2008 1 commit
  26. 05 Sep, 2008 1 commit
    • Stanislaw Gruszka's avatar
      atmel_lcdfb: fix oops in rmmod when framebuffer fails to register · 34a35bdd
      Stanislaw Gruszka authored
      If framebuffer registration failed in platform driver ->probe() callback,
      dev_get_drvdata() points to freed memory region, but ->remove() function
      try to use it and the following oops occurs:
      
      Unable to handle kernel NULL pointer dereference at virtual address 00000228
      pgd = c3a20000
      [00000228] *pgd=23a2b031, *pte=00000000, *ppte=00000000
      Internal error: Oops: 17 [#1]
      Modules linked in: atmel_lcdfb(-) cfbcopyarea cfbimgblt cfbfillrect [last unloaded: atmel_lcdfb]
      CPU: 0    Not tainted  (2.6.27-rc2 #116)
      PC is at atmel_lcdfb_remove+0x14/0xf8 [atmel_lcdfb]
      LR is at platform_drv_remove+0x20/0x24
      pc : [<bf006bc4>]    lr : [<c0157d28>]    psr: a0000013
      sp : c3a45e84  ip : c3a45ea0  fp : c3a45e9c
      r10: 00000002  r9 : c3a44000  r8 : c0026c04
      r7 : 00000880  r6 : c02bb228  r5 : 00000000  r4 : c02bb230
      r3 : bf007e3c  r2 : c02bb230  r1 : 00000004  r0 : c02bb228
      Flags: NzCv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment user
      Control: 0005317f  Table: 23a20000  DAC: 00000015
      Process rmmod (pid: 6799, stack limit = 0xc3a44260)
      Stack: (0xc3a45e84 to 0xc3a46000)
      5e80:          c02bb230 bf007e3c bf007e3c c3a45eac c3a45ea0 c0157d28 bf006bc0
      5ea0: c3a45ec4 c3a45eb0 c0156d20 c0157d18 c02bb230 c02bb2d8 c3a45ee0 c3a45ec8
      5ec0: c0156da8 c0156cb8 bf007e3c bf007ee0 c02c8e14 c3a45efc c3a45ee4 c0156018
      5ee0: c0156d50 bf007e3c bf007ee0 00000000 c3a45f18 c3a45f00 c0157220 c0155f9c
      5f00: 00000000 bf007ee0 bf008000 c3a45f28 c3a45f1c c0157e34 c01571ec c3a45f38
      5f20: c3a45f2c bf006ba8 c0157e30 c3a45fa4 c3a45f3c c005772c bf006ba4 656d7461
      5f40: 636c5f6c 00626664 c004c988 c3a45f80 c3a45f5c 00000000 c3a45fb0 00000000
      5f60: ffffffff becaccd8 00000880 00000000 000a5e80 00000001 bf007ee0 00000880
      5f80: c3a45f84 00000000 becaccd4 00000002 000003df 00000081 00000000 c3a45fa8
      5fa0: c0026a60 c0057584 00000002 000003df 00900081 000a5e80 00000880 00000000
      5fc0: becaccd4 00000002 000003df 00000000 000a5e80 00000001 00000002 0000005f
      5fe0: 4004f5ec becacbe8 0001a158 4004f5fc 20000010 00900081 f9ffbadf 7bbfb2bb
      Backtrace:
      [<bf006bb0>] (atmel_lcdfb_remove+0x0/0xf8 [atmel_lcdfb]) from [<c0157d28>] (platform_drv_remove+0x20/0x24)
       r6:bf007e3c r5:bf007e3c r4:c02bb230
      [<c0157d08>] (platform_drv_remove+0x0/0x24) from [<c0156d20>] (__device_release_driver+0x78/0x98)
      [<c0156ca8>] (__device_release_driver+0x0/0x98) from [<c0156da8>] (driver_detach+0x68/0x90)
       r5:c02bb2d8 r4:c02bb230
      [<c0156d40>] (driver_detach+0x0/0x90) from [<c0156018>] (bus_remove_driver+0x8c/0xb4)
       r6:c02c8e14 r5:bf007ee0 r4:bf007e3c
      [<c0155f8c>] (bus_remove_driver+0x0/0xb4) from [<c0157220>] (driver_unregister+0x44/0x48)
       r6:00000000 r5:bf007ee0 r4:bf007e3c
      [<c01571dc>] (driver_unregister+0x0/0x48) from [<c0157e34>] (platform_driver_unregister+0x14/0x18)
       r6:bf008000 r5:bf007ee0 r4:00000000
      [<c0157e20>] (platform_driver_unregister+0x0/0x18) from [<bf006ba8>] (atmel_lcdfb_exit+0x14/0x1c [atmel_lcdfb])
      [<bf006b94>] (atmel_lcdfb_exit+0x0/0x1c [atmel_lcdfb]) from [<c005772c>] (sys_delete_module+0x1b8/0x22c)
      [<c0057574>] (sys_delete_module+0x0/0x22c) from [<c0026a60>] (ret_fast_syscall+0x0/0x2c)
       r7:00000081 r6:000003df r5:00000002 r4:becaccd4
      Code: e92dd870 e24cb004 e59050c4 e1a06000 (e5954228)
      ---[ end trace 85476b184d9e68d8 ]---
      
      This patch fixes the oops.
      Signed-off-by: default avatarStanislaw Gruszka <stf_xl@wp.pl>
      Acked-by: default avatarNicolas Ferre <nicolas.ferre@atmel.com>
      Acked-by: default avatarKrzysztof Helt <krzysztof.h1@wp.pl>
      Cc: Haavard Skinnemoen <hskinnemoen@atmel.com>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      34a35bdd
  27. 12 Aug, 2008 2 commits
  28. 07 Aug, 2008 1 commit
  29. 24 Jul, 2008 2 commits
  30. 13 May, 2008 1 commit
  31. 28 Apr, 2008 4 commits
  32. 06 Feb, 2008 1 commit
    • David Brownell's avatar
      atmel_lcdfb: backlight control · a9a84c37
      David Brownell authored
      On the sam9 EK boards, the LCD backlight is hooked up to a PWM output from
      the LCD controller.  It's controlled by "contrast" registers though.
      
      This patch lets boards declare that they have that kind of backlight
      control.  The driver can then export this control, letting screenblank and
      other operations actually take effect ...  reducing the typically
      substantial power drain from the backlight.
      
      Note that it's not fully cooked
        - doesn't force backlight off during system suspend
        - the "power" and "blank" events may not be done right
      This should be easily added in the future.
      
      [nicolas.ferre@atmel.com: remove unneeded inline and rename functions]
      Signed-off-by: default avatarDavid Brownell <dbrownell@users.sourceforge.net>
      Signed-off-by: default avatarNicolas Ferre <nicolas.ferre@atmel.com>
      Cc: Andrew Victor <linux@maxim.org.za>
      Cc: Russell King <rmk@arm.linux.org.uk>
      Cc: "Antonino A. Daplas" <adaplas@pol.net>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      a9a84c37