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This project is mirrored from https://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-stable-rt.git. Pull mirroring updated .
  1. Jan 16, 2010
  2. Jan 14, 2010
  3. Jan 13, 2010
  4. Jan 12, 2010
  5. Jan 11, 2010
  6. Jan 08, 2010
  7. Jan 07, 2010
  8. Jan 06, 2010
    • Jesse Barnes's avatar
      drm/i915: execbuf2 support · 76446cac
      Jesse Barnes authored
      
      This patch adds a new execbuf ioctl, execbuf2, for use by clients that
      want to control fence register allocation more finely.  The buffer
      passed in to the new ioctl includes a new relocation type to indicate
      whether a given object needs a fence register assigned for the command
      buffer in question.
      
      Compatibility with the existing execbuf ioctl is implemented in terms
      of the new code, preserving the assumption that fence registers are
      required for pre-965 rendering commands.
      
      Signed-off-by: default avatarJesse Barnes <jbarnes@virtuousgeek.org>
      [ickle: Remove pre-emptive clear_fence_reg()]
      Signed-off-by: default avatarChris Wilson <chris@chris-wilson.co.uk>
      Signed-off-by: default avatarKristian Høgsberg <krh@bitplanet.net>
      [anholt: Removed dmesg spam]
      Signed-off-by: default avatarEric Anholt <eric@anholt.net>
      76446cac
    • Eric W. Biederman's avatar
      Input: serio - fix potential deadlock when unbinding drivers · 59b01513
      Eric W. Biederman authored
      
      sysfs_remove_group() waits for sysfs attributes to be removed, therefore
      we do not need to worry about driver-specific attributes being accessed
      after driver has been detached from the device. In fact, attempts to take
      serio->drv_mutex in attribute methods may lead to the following deadlock:
      
                                                sysfs_read_file()
                                                  fill_read_buffer()
                                                    sysfs_get_active_two()
                                                      psmouse_attr_show_helper()
                                                        serio_pin_driver()
      serio_disconnect_driver()
        mutex_lock(&serio->drv_mutex);
                                      <-------->        mutex_lock(&serio_drv_mutex);
          psmouse_disconnect()
            sysfs_remove_group(... psmouse_attr_group);
              ....
              sysfs_deactivate();
                wait_for_completion();
      
      Fix this by removing calls to serio_[un]pin_driver() and functions themselves
      and using driver-private mutexes to serialize access to attribute's set()
      methods that may change device state.
      
      Signed-off-by: default avatarEric W. Biederman <ebiederm@xmission.com>
      Signed-off-by: default avatarDmitry Torokhov <dtor@mail.ru>
      59b01513
  9. Jan 04, 2010
    • Rafael J. Wysocki's avatar
      PCI/PM: Use per-device D3 delays · 1ae861e6
      Rafael J. Wysocki authored
      It turns out that some PCI devices require extra delays when changing
      power state from D3 to D0 (and the other way around).  Although this
      is against the PCI specification, we can handle it quite easily by
      allowing drivers to define arbitrary D3 delays for devices known to
      require extra time for switching power states.
      
      Introduce additional field d3_delay in struct pci_dev and use it to
      store the value of the device's D0->D3 delay, in miliseconds.  Make
      the PCI PM core code use the per-device d3_delay unless
      pci_pm_d3_delay is greater (in which case the latter is used).
      [This also allows the driver to specify d3_delay shorter than the
       10 ms required by the PCI standard if the device is known to be able
       to handle that.]
      
      Make the sky2 driver set d3_delay to 150 for devices handled by it.
      
      Fixes http://bugzilla.kernel.org/show_bug.cgi?id=14730
      
       which is a
      listed regression from 2.6.30.
      
      Signed-off-by: default avatarRafael J. Wysocki <rjw@sisk.pl>
      Signed-off-by: default avatarJesse Barnes <jbarnes@virtuousgeek.org>
      1ae861e6
    • Jiri Slaby's avatar
      resource: add helpers for fetching rlimits · 3e10e716
      Jiri Slaby authored
      
      We want to be sure that compiler fetches the limit variable only
      once, so add helpers for fetching current and maximal resource
      limits which do that.
      
      Add them to sched.h (instead of resource.h) due to circular dependency
       sched.h->resource.h->task_struct
      Alternative would be to create a separate res_access.h or similar.
      
      Signed-off-by: default avatarJiri Slaby <jslaby@suse.cz>
      Cc: James Morris <jmorris@namei.org>
      Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
      Cc: Andrew Morton <akpm@linux-foundation.org>
      Cc: Ingo Molnar <mingo@elte.hu>
      3e10e716
    • Jiri Slaby's avatar
      resource: move kernel function inside __KERNEL__ · 96d07d21
      Jiri Slaby authored
      
      It is an internal function. Move it inside __KERNEL__ ifdef, along
      with task_struct declaration.
      
      Then we get:
      --- /usr/include/linux/resource.h       2009-09-14 15:09:29.000000000 +0200
      +++ usr/include/linux/resource.h       2010-01-04 11:30:54.000000000 +0100
      @@ -3,8 +3,6 @@
      
       #include <linux/time.h>
      
      -struct task_struct;
      -
       /*
        * Resource control/accounting header file for linux
        */
      @@ -70,6 +68,5 @@
        */
       #include <asm/resource.h>
      
      -int getrusage(struct task_struct *p, int who, struct rusage *ru);
      
       #endif
      
      ***********
      
      include/linux/Kbuild is untouched, since unifdef is run even on
      headers-y nowadays.
      
      Signed-off-by: default avatarJiri Slaby <jslaby@suse.cz>
      96d07d21
  10. Jan 02, 2010
    • Frederic Weisbecker's avatar
      reiserfs: Warn on lock relax if taken recursively · c4a62ca3
      Frederic Weisbecker authored
      
      When we relax the reiserfs lock to avoid creating unwanted
      dependencies against others locks while grabbing these,
      we want to ensure it has not been taken recursively, otherwise
      the lock won't be really relaxed. Only its depth will be decreased.
      The unwanted dependency would then actually happen.
      
      To prevent from that, add a reiserfs_lock_check_recursive() call
      in the places that need it.
      
      Signed-off-by: default avatarFrederic Weisbecker <fweisbec@gmail.com>
      Cc: Alexander Beregalov <a.beregalov@gmail.com>
      Cc: Chris Mason <chris.mason@oracle.com>
      Cc: Ingo Molnar <mingo@elte.hu>
      c4a62ca3
    • Frederic Weisbecker's avatar
      reiserfs: Fix reiserfs lock <-> i_xattr_sem dependency inversion · 0719d343
      Frederic Weisbecker authored
      
      i_xattr_sem depends on the reiserfs lock. But after we grab
      i_xattr_sem, we may relax/relock the reiserfs lock while waiting
      on a freezed filesystem, creating a dependency inversion between
      the two locks.
      
      In order to avoid the i_xattr_sem -> reiserfs lock dependency, let's
      create a reiserfs_down_read_safe() that acts like
      reiserfs_mutex_lock_safe(): relax the reiserfs lock while grabbing
      another lock to avoid undesired dependencies induced by the
      heivyweight reiserfs lock.
      
      This fixes the following warning:
      
      [  990.005931] =======================================================
      [  990.012373] [ INFO: possible circular locking dependency detected ]
      [  990.013233] 2.6.33-rc1 #1
      [  990.013233] -------------------------------------------------------
      [  990.013233] dbench/1891 is trying to acquire lock:
      [  990.013233]  (&REISERFS_SB(s)->lock){+.+.+.}, at: [<ffffffff81159505>] reiserfs_write_lock+0x35/0x50
      [  990.013233]
      [  990.013233] but task is already holding lock:
      [  990.013233]  (&REISERFS_I(inode)->i_xattr_sem){+.+.+.}, at: [<ffffffff8115899a>] reiserfs_xattr_set_handle+0x8a/0x470
      [  990.013233]
      [  990.013233] which lock already depends on the new lock.
      [  990.013233]
      [  990.013233]
      [  990.013233] the existing dependency chain (in reverse order) is:
      [  990.013233]
      [  990.013233] -> #1 (&REISERFS_I(inode)->i_xattr_sem){+.+.+.}:
      [  990.013233]        [<ffffffff81063afc>] __lock_acquire+0xf9c/0x1560
      [  990.013233]        [<ffffffff8106414f>] lock_acquire+0x8f/0xb0
      [  990.013233]        [<ffffffff814ac194>] down_write+0x44/0x80
      [  990.013233]        [<ffffffff8115899a>] reiserfs_xattr_set_handle+0x8a/0x470
      [  990.013233]        [<ffffffff81158e30>] reiserfs_xattr_set+0xb0/0x150
      [  990.013233]        [<ffffffff8115a6aa>] user_set+0x8a/0x90
      [  990.013233]        [<ffffffff8115901a>] reiserfs_setxattr+0xaa/0xb0
      [  990.013233]        [<ffffffff810e2596>] __vfs_setxattr_noperm+0x36/0xa0
      [  990.013233]        [<ffffffff810e26bc>] vfs_setxattr+0xbc/0xc0
      [  990.013233]        [<ffffffff810e2780>] setxattr+0xc0/0x150
      [  990.013233]        [<ffffffff810e289d>] sys_fsetxattr+0x8d/0xa0
      [  990.013233]        [<ffffffff81002dab>] system_call_fastpath+0x16/0x1b
      [  990.013233]
      [  990.013233] -> #0 (&REISERFS_SB(s)->lock){+.+.+.}:
      [  990.013233]        [<ffffffff81063e30>] __lock_acquire+0x12d0/0x1560
      [  990.013233]        [<ffffffff8106414f>] lock_acquire+0x8f/0xb0
      [  990.013233]        [<ffffffff814aba77>] __mutex_lock_common+0x47/0x3b0
      [  990.013233]        [<ffffffff814abebe>] mutex_lock_nested+0x3e/0x50
      [  990.013233]        [<ffffffff81159505>] reiserfs_write_lock+0x35/0x50
      [  990.013233]        [<ffffffff811340e5>] reiserfs_prepare_write+0x45/0x180
      [  990.013233]        [<ffffffff81158bb6>] reiserfs_xattr_set_handle+0x2a6/0x470
      [  990.013233]        [<ffffffff81158e30>] reiserfs_xattr_set+0xb0/0x150
      [  990.013233]        [<ffffffff8115a6aa>] user_set+0x8a/0x90
      [  990.013233]        [<ffffffff8115901a>] reiserfs_setxattr+0xaa/0xb0
      [  990.013233]        [<ffffffff810e2596>] __vfs_setxattr_noperm+0x36/0xa0
      [  990.013233]        [<ffffffff810e26bc>] vfs_setxattr+0xbc/0xc0
      [  990.013233]        [<ffffffff810e2780>] setxattr+0xc0/0x150
      [  990.013233]        [<ffffffff810e289d>] sys_fsetxattr+0x8d/0xa0
      [  990.013233]        [<ffffffff81002dab>] system_call_fastpath+0x16/0x1b
      [  990.013233]
      [  990.013233] other info that might help us debug this:
      [  990.013233]
      [  990.013233] 2 locks held by dbench/1891:
      [  990.013233]  #0:  (&sb->s_type->i_mutex_key#12){+.+.+.}, at: [<ffffffff810e2678>] vfs_setxattr+0x78/0xc0
      [  990.013233]  #1:  (&REISERFS_I(inode)->i_xattr_sem){+.+.+.}, at: [<ffffffff8115899a>] reiserfs_xattr_set_handle+0x8a/0x470
      [  990.013233]
      [  990.013233] stack backtrace:
      [  990.013233] Pid: 1891, comm: dbench Not tainted 2.6.33-rc1 #1
      [  990.013233] Call Trace:
      [  990.013233]  [<ffffffff81061639>] print_circular_bug+0xe9/0xf0
      [  990.013233]  [<ffffffff81063e30>] __lock_acquire+0x12d0/0x1560
      [  990.013233]  [<ffffffff8115899a>] ? reiserfs_xattr_set_handle+0x8a/0x470
      [  990.013233]  [<ffffffff8106414f>] lock_acquire+0x8f/0xb0
      [  990.013233]  [<ffffffff81159505>] ? reiserfs_write_lock+0x35/0x50
      [  990.013233]  [<ffffffff8115899a>] ? reiserfs_xattr_set_handle+0x8a/0x470
      [  990.013233]  [<ffffffff814aba77>] __mutex_lock_common+0x47/0x3b0
      [  990.013233]  [<ffffffff81159505>] ? reiserfs_write_lock+0x35/0x50
      [  990.013233]  [<ffffffff81159505>] ? reiserfs_write_lock+0x35/0x50
      [  990.013233]  [<ffffffff81062592>] ? mark_held_locks+0x72/0xa0
      [  990.013233]  [<ffffffff814ab81d>] ? __mutex_unlock_slowpath+0xbd/0x140
      [  990.013233]  [<ffffffff810628ad>] ? trace_hardirqs_on_caller+0x14d/0x1a0
      [  990.013233]  [<ffffffff814abebe>] mutex_lock_nested+0x3e/0x50
      [  990.013233]  [<ffffffff81159505>] reiserfs_write_lock+0x35/0x50
      [  990.013233]  [<ffffffff811340e5>] reiserfs_prepare_write+0x45/0x180
      [  990.013233]  [<ffffffff81158bb6>] reiserfs_xattr_set_handle+0x2a6/0x470
      [  990.013233]  [<ffffffff81158e30>] reiserfs_xattr_set+0xb0/0x150
      [  990.013233]  [<ffffffff814abcb4>] ? __mutex_lock_common+0x284/0x3b0
      [  990.013233]  [<ffffffff8115a6aa>] user_set+0x8a/0x90
      [  990.013233]  [<ffffffff8115901a>] reiserfs_setxattr+0xaa/0xb0
      [  990.013233]  [<ffffffff810e2596>] __vfs_setxattr_noperm+0x36/0xa0
      [  990.013233]  [<ffffffff810e26bc>] vfs_setxattr+0xbc/0xc0
      [  990.013233]  [<ffffffff810e2780>] setxattr+0xc0/0x150
      [  990.013233]  [<ffffffff81056018>] ? sched_clock_cpu+0xb8/0x100
      [  990.013233]  [<ffffffff8105eded>] ? trace_hardirqs_off+0xd/0x10
      [  990.013233]  [<ffffffff810560a3>] ? cpu_clock+0x43/0x50
      [  990.013233]  [<ffffffff810c6820>] ? fget+0xb0/0x110
      [  990.013233]  [<ffffffff810c6770>] ? fget+0x0/0x110
      [  990.013233]  [<ffffffff81002ddc>] ? sysret_check+0x27/0x62
      [  990.013233]  [<ffffffff810e289d>] sys_fsetxattr+0x8d/0xa0
      [  990.013233]  [<ffffffff81002dab>] system_call_fastpath+0x16/0x1b
      
      Reported-and-tested-by: default avatarChristian Kujau <lists@nerdbynature.de>
      Signed-off-by: default avatarFrederic Weisbecker <fweisbec@gmail.com>
      Cc: Alexander Beregalov <a.beregalov@gmail.com>
      Cc: Chris Mason <chris.mason@oracle.com>
      Cc: Ingo Molnar <mingo@elte.hu>
      0719d343
  11. Dec 31, 2009
  12. Dec 30, 2009
  13. Dec 29, 2009
    • Clemens Ladisch's avatar
      firewire: fix use of multiple AV/C devices, allow multiple FCP listeners · db5d247a
      Clemens Ladisch authored
      
      Control of more than one AV/C device at once --- e.g. camcorders, tape
      decks, audio devices, TV tuners --- failed or worked only unreliably,
      depending on driver implementation.  This affected kernelspace and
      userspace drivers alike and was caused by firewire-core's inability to
      accept multiple registrations of FCP listeners.
      
      The fix allows multiple address handlers to be registered for the FCP
      command and response registers.  When a request for these registers is
      received, all handlers are invoked, and the Firewire response is
      generated by the core and not by any handler.
      
      The cdev API does not change, i.e., userspace is still expected to send
      a response for FCP requests; this response is silently ignored.
      
      Signed-off-by: default avatarClemens Ladisch <clemens@ladisch.de>
      Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> (changelog, rebased, whitespace)
      db5d247a
    • Martin K. Petersen's avatar
      block: Fix incorrect alignment offset reporting and update documentation · 81744ee4
      Martin K. Petersen authored
      
      queue_sector_alignment_offset returned the wrong value which caused
      partitions to report an incorrect alignment_offset.  Since offset
      alignment calculation is needed several places it has been split into a
      separate helper function.  The topology stacking function has been
      updated accordingly.
      
      Furthermore, comments have been added to clarify how the stacking
      function works.
      
      Signed-off-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
      Tested-by: default avatarMike Snitzer <snitzer@redhat.com>
      Signed-off-by: default avatarJens Axboe <jens.axboe@oracle.com>
      81744ee4
  14. Dec 28, 2009
  15. Dec 26, 2009
    • Jamal Hadi Salim's avatar
      net: restore ip source validation · 28f6aeea
      Jamal Hadi Salim authored
      
      when using policy routing and the skb mark:
      there are cases where a back path validation requires us
      to use a different routing table for src ip validation than
      the one used for mapping ingress dst ip.
      One such a case is transparent proxying where we pretend to be
      the destination system and therefore the local table
      is used for incoming packets but possibly a main table would
      be used on outbound.
      Make the default behavior to allow the above and if users
      need to turn on the symmetry via sysctl src_valid_mark
      
      Signed-off-by: default avatarJamal Hadi Salim <hadi@cyberus.ca>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      28f6aeea
  16. Dec 23, 2009
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