1. 28 Jan, 2013 1 commit
    • Wang YanQing's avatar
      smp: Fix SMP function call empty cpu mask race · f44310b9
      Wang YanQing authored
      I get the following warning every day with v3.7, once or
      twice a day:
      
        [ 2235.186027] WARNING: at /mnt/sda7/kernel/linux/arch/x86/kernel/apic/ipi.c:109 default_send_IPI_mask_logical+0x2f/0xb8()
      
      As explained by Linus as well:
      
       |
       | Once we've done the "list_add_rcu()" to add it to the
       | queue, we can have (another) IPI to the target CPU that can
       | now see it and clear the mask.
       |
       | So by the time we get to actually send the IPI, the mask might
       | have been cleared by another IPI.
       |
      
      This patch also fixes a system hang problem, if the data->cpumask
      gets cleared after passing this point:
      
              if (WARN_ONCE(!mask, "empty IPI mask"))
                      return;
      
      then the problem in commit 83d349f3 ("x86: don't send an IPI to
      the empty set of CPU's") will happen again.
      Signed-off-by: default avatarWang YanQing <udknight@gmail.com>
      Acked-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      Acked-by: default avatarJan Beulich <jbeulich@suse.com>
      Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
      Cc: Andrew Morton <akpm@linux-foundation.org>
      Cc: peterz@infradead.org
      Cc: mina86@mina86.org
      Cc: srivatsa.bhat@linux.vnet.ibm.com
      Cc: <stable@kernel.org>
      Link: http://lkml.kernel.org/r/20130126075357.GA3205@udknight
      [ Tidied up the changelog and the comment in the code. ]
      Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
      f44310b9
  2. 24 Jan, 2013 5 commits
  3. 19 Jan, 2013 1 commit
    • H. Peter Anvin's avatar
      x86-32: Start out cr0 clean, disable paging before modifying cr3/4 · 021ef050
      H. Peter Anvin authored
      Patch
      
        5a5a51db x86-32: Start out eflags and cr4 clean
      
      ... made x86-32 match x86-64 in that we initialize %eflags and %cr4
      from scratch.  This broke OLPC XO-1.5, because the XO enters the
      kernel with paging enabled, which the kernel doesn't expect.
      
      Since we no longer support 386 (the source of most of the variability
      in %cr0 configuration), we can simply match further x86-64 and
      initialize %cr0 to a fixed value -- the one variable part remaining in
      %cr0 is for FPU control, but all that is handled later on in
      initialization; in particular, configuring %cr0 as if the FPU is
      present until proven otherwise is correct and necessary for the probe
      to work.
      
      To deal with the XO case sanely, explicitly disable paging in %cr0
      before we muck with %cr3, %cr4 or EFER -- those operations are
      inherently unsafe with paging enabled.
      
      NOTE: There is still a lot of 386-related junk in head_32.S which we
      can and should get rid of, however, this is intended as a minimal fix
      whereas the cleanup can be deferred to the next merge window.
      Reported-by: default avatarAndres Salomon <dilinger@queued.net>
      Tested-by: default avatarDaniel Drake <dsd@laptop.org>
      Link: http://lkml.kernel.org/r/50FA0661.2060400@linux.intel.comSigned-off-by: default avatarH. Peter Anvin <hpa@linux.intel.com>
      021ef050
  4. 18 Jan, 2013 1 commit
  5. 17 Jan, 2013 2 commits
    • Linus Torvalds's avatar
      Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux · 72ffaa48
      Linus Torvalds authored
      Pull more s390 patches from Martin Schwidefsky:
       "A couple of bug fixes: one of the transparent huge page primitives is
        broken, the sched_clock function overflows after 417 days, the XFS
        module has grown too large for -fpic and the new pci code has broken
        normal channel subsystem notifications."
      
      * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
        s390/chsc: fix SEI usage
        s390/time: fix sched_clock() overflow
        s390: use -fPIC for module compile
        s390/mm: fix pmd_pfn() for thp
      72ffaa48
    • Linus Torvalds's avatar
      Merge tag 'for-linus-v3.8-rc4' of git://oss.sgi.com/xfs/xfs · dfdebc24
      Linus Torvalds authored
      Pull xfs bugfixes from Ben Myers:
      
       - fix(es) for compound buffers
      
       - fix for dquot soft timer asserts due to overflow of d_blk_softlimit
      
       - fix for regression in dir v2 code introduced in commit 20f7e9f3
         ("xfs: factor dir2 block read operations")
      
      * tag 'for-linus-v3.8-rc4' of git://oss.sgi.com/xfs/xfs:
        xfs: recalculate leaf entry pointer after compacting a dir2 block
        xfs: remove int casts from debug dquot soft limit timer asserts
        xfs: fix the multi-segment log buffer format
        xfs: fix segment in xfs_buf_item_format_segment
        xfs: rename bli_format to avoid confusion with bli_formats
        xfs: use b_maps[] for discontiguous buffers
      dfdebc24
  6. 16 Jan, 2013 24 commits
  7. 15 Jan, 2013 6 commits
    • Will Deacon's avatar
      arm64: compat: add syscall table entries for new syscalls · 72d0ac04
      Will Deacon authored
      There have been a number of new syscalls introduced to arch/arm/ since
      the compat layer was implemented for arm64, so add pointers to the
      relevant functions to the compat syscall table.
      Signed-off-by: default avatarWill Deacon <will.deacon@arm.com>
      Signed-off-by: default avatarCatalin Marinas <catalin.marinas@arm.com>
      72d0ac04
    • Takashi Iwai's avatar
      ALSA: hda/hdmi - Work around "alsactl restore" errors · 6f54c361
      Takashi Iwai authored
      When "alsactl restore" is performed on HDMI codecs, it tries to
      restore the channel map value since the channel map controls are
      writable.  But hdmi_chmap_ctl_put() returns -EBADFD when no PCM stream
      is assigned yet, and this results in an error message from alsactl.
      Although the error is harmless, it's certainly ugly and can be
      regarded as a regression.
      
      As a workaround, this patch changes the return code in such a case to
      be zero for making others happy.  (A slight excuse is: when the chmap
      is changed through the proper alsa-lib API, the PCM status is checked
      there anyway, so we don't have to be too strict in the kernel side.)
      
      Cc: <stable@vger.kernel.org> [v3.7+]
      Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
      6f54c361
    • Daniel Lezcano's avatar
      cpuidle: remove the power_specified field in the driver · 8aef33a7
      Daniel Lezcano authored
      We realized that the power usage field is never filled and when it
      is filled for tegra, the power_specified flag is not set causing all
      of these values to be reset when the driver is initialized with
      set_power_state().
      
      However, the power_specified flag can be simply removed under the
      assumption that the states are always backward sorted, which is the
      case with the current code.
      
      This change allows the menu governor select function and the
      cpuidle_play_dead() to be simplified.  Moreover, the
      set_power_states() function can removed as it does not make sense
      any more.
      
      Drop the power_specified flag from struct cpuidle_driver and make
      the related changes as described above.
      
      As a consequence, this also fixes the bug where on the dynamic
      C-states system, the power fields are not initialized.
      
      [rjw: Changelog]
      References: https://bugzilla.kernel.org/show_bug.cgi?id=42870
      References: https://bugzilla.kernel.org/show_bug.cgi?id=43349
      References: https://lkml.org/lkml/2012/10/16/518Signed-off-by: default avatarDaniel Lezcano <daniel.lezcano@linaro.org>
      Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
      8aef33a7
    • Takashi Iwai's avatar
      Merge tag 'asoc-atmel-pinctrl' of... · 2e4c4dbe
      Takashi Iwai authored
      Merge tag 'asoc-atmel-pinctrl' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into for-linus
      
      ASoC: atmel: Fixes for pinctrl
      
      Due to a series of problems with the handling of Atmel, a combination of
      making changes that make other branches instantly buggy and a general
      failure to deal with the resulting issues effectively, v3.8 Atmel audio
      currently won't work at all for DT boards without adding pinctrl
      definitions and a request for those.
      2e4c4dbe
    • Linus Torvalds's avatar
      Merge tag 'trace-3.8-rc3-regression-fix' of... · 406089d0
      Linus Torvalds authored
      Merge tag 'trace-3.8-rc3-regression-fix' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
      
      Pull tracing regression fixes from Steven Rostedt:
       "The clean up patch commit 0fb9656d "tracing: Make tracing_enabled
        be equal to tracing_on" caused two regressions.
      
         1) The irqs off latency tracer no longer starts if tracing_on is off
            when the tracer is set, and then tracing_on is enabled.  The
            tracing_on file needs the hook that tracing_enabled had to enable
            tracers if they request it (call the tracer's start() method).
      
         2) That commit had a separate change that really should have been a
            separate patch, but it must have been added accidently with the -a
            option of git commit.  But as the change is still related to the
            commit it wasn't noticed in review.  That change, changed the way
            blocking is done by the trace_pipe file with respect to the
            tracing_on settings.  I've been told that this change breaks
            current userspace, and this specific change is being reverted."
      
      * tag 'trace-3.8-rc3-regression-fix' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
        tracing: Fix regression of trace_pipe
        tracing: Fix regression with irqsoff tracer and tracing_on file
      406089d0
    • Linus Torvalds's avatar
      Merge tag 'regmap-debugfs-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap · 7dea1ff3
      Linus Torvalds authored
      Pull regmap debugfs optimisation fixes from Mark Brown:
       "The debugfs optimisations merged in v3.8 weren't my finest hour, there
        were a number of cases that the more complex algorithm made worse
        especially around the error handling.  This patch series should
        address those issues."
      
      * tag 'regmap-debugfs-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap:
        regmap: debugfs: Make sure we store the last entry in the offset cache
        regmap: debugfs: Ensure a correct return value for empty caches
        regmap: debugfs: Discard the cache if we fail to allocate an entry
        regmap: debugfs: Fix check for block start in cached seeks
        regmap: debugfs: Fix attempts to read nonexistant register blocks
      7dea1ff3