1. 11 May, 2012 2 commits
    • Rafael J. Wysocki's avatar
      PM / Domains: Fix computation of maximum domain off time · b723b0eb
      Rafael J. Wysocki authored
      The default domain power off governor function for generic PM
      domains, default_power_down_ok(), may violate subdomain maximum
      off time limit by allowing the master domain to be off for too
      long.  Namely, it only finds the minium of all device maximum
      off times over the domain's devices and uses that to compute the
      domain's maximum off time, but it should do the same for the
      subdomains.
      
      Fix this problem by modifying default_power_down_ok() to compute
      the given domain's maximum off time as the difference between the
      minimum off time over all devices and subdomains in the domain and
      its power on latency.
      Signed-off-by: default avatarRafael J. Wysocki <rjw@sisk.pl>
      b723b0eb
    • Huang Ying's avatar
      PM / Domains: Fix link checking when add subdomain · 4fcac10d
      Huang Ying authored
      Current pm_genpd_add_subdomain() will allow duplicated link between
      master and slave domain.  This patch fixed it.
      
      Because when current pm_genpd_add_subdomain() checks whether the link
      between the master and slave generic PM domain already exists,
      slave_links instead of master_links of master domain is used.
      Signed-off-by: default avatarHuang Ying <ying.huang@intel.com>
      Signed-off-by: default avatarRafael J. Wysocki <rjw@sisk.pl>
      4fcac10d
  2. 05 May, 2012 2 commits
    • Rafael J. Wysocki's avatar
      PM / Domains: Cache device stop and domain power off governor results, v3 · 6ff7bb0d
      Rafael J. Wysocki authored
      The results of the default device stop and domain power off governor
      functions for generic PM domains, default_stop_ok() and
      default_power_down_ok(), depend only on the timing data of devices,
      which are static, and on their PM QoS constraints.  Thus, in theory,
      these functions only need to carry out their computations, which may
      be time consuming in general, when it is known that the PM QoS
      constraint of at least one of the devices in question has changed.
      
      Use the PM QoS notifiers of devices to implement that.  First,
      introduce new fields, constraint_changed and max_off_time_changed,
      into struct gpd_timing_data and struct generic_pm_domain,
      respectively, and register a PM QoS notifier function when adding
      a device into a domain that will set those fields to 'true' whenever
      the device's PM QoS constraint is modified.  Second, make
      default_stop_ok() and default_power_down_ok() use those fields to
      decide whether or not to carry out their computations from scratch.
      
      The device and PM domain hierarchies are taken into account in that
      and the expense is that the changes of PM QoS constraints of
      suspended devices will not be taken into account immediately, which
      isn't guaranteed anyway in general.
      Signed-off-by: default avatarRafael J. Wysocki <rjw@sisk.pl>
      6ff7bb0d
    • Rafael J. Wysocki's avatar
      PM / Domains: Make device removal more straightforward · efa69025
      Rafael J. Wysocki authored
      The removal of a device from a PM domain doesn't have to browse
      the domain's device list, because it can check directly if the
      device belongs to the given domain.  Moreover, it should clear
      the domain_data pointer in dev->power.subsys_data, because
      dev_pm_put_subsys_data(dev) may not remove dev->power.subsys_data
      and the stale domain data pointer may cause problems to happen.
      
      Rework pm_genpd_remove_device() taking the above observations into
      account.
      Signed-off-by: default avatarRafael J. Wysocki <rjw@sisk.pl>
      efa69025
  3. 01 May, 2012 4 commits
    • Rafael J. Wysocki's avatar
      PM / QoS: Create device constraints objects on notifier registration · 23e0fc5a
      Rafael J. Wysocki authored
      The current behavior of dev_pm_qos_add_notifier() makes device PM QoS
      notifiers less than useful.  Namely, it silently returns success when
      called before any PM QoS constraints are added for the device, so the
      caller will assume that the notifier has been registered, but when
      someone actually adds some nontrivial constraints for the device
      eventually, the previous callers of dev_pm_qos_add_notifier()
      will not know about that and their notifier routines will not be
      executed (contrary to their expectations).
      
      To address this problem make dev_pm_qos_add_notifier() create the
      constraints object for the device if it is not present when the
      routine is called.
      Signed-off-by: default avatarRafael J. Wysocki <rjw@sisk.pl>
      Acked-by : markgross <markgross@thegnar.org>
      23e0fc5a
    • Rafael J. Wysocki's avatar
      PM / Runtime: Remove device fields related to suspend time, v2 · 76e267d8
      Rafael J. Wysocki authored
      After the previous changes in default_stop_ok() and
      default_power_down_ok() for PM domains, there are two fields in
      struct dev_pm_info that aren't necessary any more,  suspend_time
      and max_time_suspended_ns.
      
      Remove those fields along with all of the code that accesses them,
      which simplifies the runtime PM framework quite a bit.
      Signed-off-by: default avatarRafael J. Wysocki <rjw@sisk.pl>
      76e267d8
    • Rafael J. Wysocki's avatar
      PM / Domains: Rework default domain power off governor function, v2 · dd8683e9
      Rafael J. Wysocki authored
      The existing default domain power down governor function for PM
      domains, default_power_down_ok(), is supposed to check whether or not
      the PM QoS latency constraints of the devices in the domain will be
      violated if the domain is turned off by pm_genpd_poweroff().
      However, the computations carried out by it don't reflect the
      definition of the PM QoS latency constrait in
      Documentation/ABI/testing/sysfs-devices-power.
      
      Make default_power_down_ok() follow the definition of the PM QoS
      latency constrait.  In particular, make it only take latencies into
      account, because it doesn't matter how much time has elapsed since
      the domain's devices were suspended for the computation.
      
      Remove the break_even_ns and power_off_time fields from
      struct generic_pm_domain, because they are not necessary any more.
      Signed-off-by: default avatarRafael J. Wysocki <rjw@sisk.pl>
      dd8683e9
    • Rafael J. Wysocki's avatar
      PM / Domains: Rework default device stop governor function, v2 · a5bef810
      Rafael J. Wysocki authored
      The existing default device stop governor function for PM domains,
      default_stop_ok(), is supposed to check whether or not the device's
      PM QoS latency constraint will be violated if the device is stopped
      by pm_genpd_runtime_suspend().  However, the computations carried out
      by it don't reflect the definition of the PM QoS latency constrait in
      Documentation/ABI/testing/sysfs-devices-power.
      
      Make default_stop_ok() follow the definition of the PM QoS latency
      constrait.  In particular, make it take the device's start and stop
      latencies correctly.
      
      Add a new field, effective_constraint_ns, to struct gpd_timing_data
      and use it to store the difference between the device's PM QoS
      constraint and its resume latency for use by the device's parent
      (the effective_constraint_ns values for the children are used for
      computing the parent's one along with its PM QoS constraint).
      
      Remove the break_even_ns field from struct gpd_timing_data, because
      it's not used any more.
      Signed-off-by: default avatarRafael J. Wysocki <rjw@sisk.pl>
      a5bef810
  4. 29 Apr, 2012 7 commits
    • Linus Torvalds's avatar
      Linux 3.4-rc5 · 69964ea4
      Linus Torvalds authored
      69964ea4
    • Linus Torvalds's avatar
      Merge tag 'pm-for-3.4-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm · 6cfdd02b
      Linus Torvalds authored
      Pull power management fixes from Rafael J. Wysocki:
       "Fix for an issue causing hibernation to hang on systems with highmem
        (that practically means i386) due to broken memory management (bug
        introduced in 3.2, so -stable material) and PM documentation update
        making the freezer documentation follow the code again after some
        recent updates."
      
      * tag 'pm-for-3.4-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
        PM / Freezer / Docs: Update documentation about freezing of tasks
        PM / Hibernate: fix the number of pages used for hibernate/thaw buffering
      6cfdd02b
    • Linus Torvalds's avatar
      autofs: make the autofsv5 packet file descriptor use a packetized pipe · 64f371bc
      Linus Torvalds authored
      The autofs packet size has had a very unfortunate size problem on x86:
      because the alignment of 'u64' differs in 32-bit and 64-bit modes, and
      because the packet data was not 8-byte aligned, the size of the autofsv5
      packet structure differed between 32-bit and 64-bit modes despite
      looking otherwise identical (300 vs 304 bytes respectively).
      
      We first fixed that up by making the 64-bit compat mode know about this
      problem in commit a32744d4 ("autofs: work around unhappy compat
      problem on x86-64"), and that made a 32-bit 'systemd' work happily on a
      64-bit kernel because everything then worked the same way as on a 32-bit
      kernel.
      
      But it turned out that 'automount' had actually known and worked around
      this problem in user space, so fixing the kernel to do the proper 32-bit
      compatibility handling actually *broke* 32-bit automount on a 64-bit
      kernel, because it knew that the packet sizes were wrong and expected
      those incorrect sizes.
      
      As a result, we ended up reverting that compatibility mode fix, and
      thus breaking systemd again, in commit fcbf94b9.
      
      With both automount and systemd doing a single read() system call, and
      verifying that they get *exactly* the size they expect but using
      different sizes, it seemed that fixing one of them inevitably seemed to
      break the other.  At one point, a patch I seriously considered applying
      from Michael Tokarev did a "strcmp()" to see if it was automount that
      was doing the operation.  Ugly, ugly.
      
      However, a prettier solution exists now thanks to the packetized pipe
      mode.  By marking the communication pipe as being packetized (by simply
      setting the O_DIRECT flag), we can always just write the bigger packet
      size, and if user-space does a smaller read, it will just get that
      partial end result and the extra alignment padding will simply be thrown
      away.
      
      This makes both automount and systemd happy, since they now get the size
      they asked for, and the kernel side of autofs simply no longer needs to
      care - it could pad out the packet arbitrarily.
      
      Of course, if there is some *other* user of autofs (please, please,
      please tell me it ain't so - and we haven't heard of any) that tries to
      read the packets with multiple writes, that other user will now be
      broken - the whole point of the packetized mode is that one system call
      gets exactly one packet, and you cannot read a packet in pieces.
      Tested-by: default avatarMichael Tokarev <mjt@tls.msk.ru>
      Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
      Cc: David Miller <davem@davemloft.net>
      Cc: Ian Kent <raven@themaw.net>
      Cc: Thomas Meyer <thomas@m3y3r.de>
      Cc: stable@kernel.org
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      64f371bc
    • Marcos Paulo de Souza's avatar
      PM / Freezer / Docs: Update documentation about freezing of tasks · 26e0f90f
      Marcos Paulo de Souza authored
      The file Documentation/power/freezing-of-tasks.txt was still referencing
      the TIF_FREEZE flag, that was removed by the commit
      d88e4cb6(freezer: remove now unused
      TIF_FREEZE).
      
      This patch removes all the references of TIF_FREEZE that were left
      behind.
      Signed-off-by: default avatarMarcos Paulo de Souza <marcos.souza.org@gmail.com>
      Signed-off-by: default avatarSrivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
      Signed-off-by: default avatarRafael J. Wysocki <rjw@sisk.pl>
      26e0f90f
    • Linus Torvalds's avatar
      pipes: add a "packetized pipe" mode for writing · 9883035a
      Linus Torvalds authored
      The actual internal pipe implementation is already really about
      individual packets (called "pipe buffers"), and this simply exposes that
      as a special packetized mode.
      
      When we are in the packetized mode (marked by O_DIRECT as suggested by
      Alan Cox), a write() on a pipe will not merge the new data with previous
      writes, so each write will get a pipe buffer of its own.  The pipe
      buffer is then marked with the PIPE_BUF_FLAG_PACKET flag, which in turn
      will tell the reader side to break the read at that boundary (and throw
      away any partial packet contents that do not fit in the read buffer).
      
      End result: as long as you do writes less than PIPE_BUF in size (so that
      the pipe doesn't have to split them up), you can now treat the pipe as a
      packet interface, where each read() system call will read one packet at
      a time.  You can just use a sufficiently big read buffer (PIPE_BUF is
      sufficient, since bigger than that doesn't guarantee atomicity anyway),
      and the return value of the read() will naturally give you the size of
      the packet.
      
      NOTE! We do not support zero-sized packets, and zero-sized reads and
      writes to a pipe continue to be no-ops.  Also note that big packets will
      currently be split at write time, but that the size at which that
      happens is not really specified (except that it's bigger than PIPE_BUF).
      Currently that limit is the system page size, but we might want to
      explicitly support bigger packets some day.
      
      The main user for this is going to be the autofs packet interface,
      allowing us to stop having to care so deeply about exact packet sizes
      (which have had bugs with 32/64-bit compatibility modes).  But user
      space can create packetized pipes with "pipe2(fd, O_DIRECT)", which will
      fail with an EINVAL on kernels that do not support this interface.
      Tested-by: default avatarMichael Tokarev <mjt@tls.msk.ru>
      Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
      Cc: David Miller <davem@davemloft.net>
      Cc: Ian Kent <raven@themaw.net>
      Cc: Thomas Meyer <thomas@m3y3r.de>
      Cc: stable@kernel.org  # needed for systemd/autofs interaction fix
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      9883035a
    • Linus Torvalds's avatar
      Merge tag 'staging-3.4-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging · de9e24ed
      Linus Torvalds authored
      Pull staging tree fixes from Greg Kroah-Hartman:
       "Here are some tiny drivers/staging/ bugfixes.  Some build fixes that
        were recently reported, as well as one kfree bug that is hitting a
        number of users."
      
      * tag 'staging-3.4-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging:
        staging: ozwpan: Fix bug where kfree is called twice.
        staging: octeon-ethernet: fix build errors by including interrupt.h
        staging: zcache: fix Kconfig crypto dependency
        staging: tidspbridge: remove usage of OMAP2_L4_IO_ADDRESS
      de9e24ed
    • Linus Torvalds's avatar
      Merge tag 'usb-3.4-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb · 8d7d1adc
      Linus Torvalds authored
      Pull USB fixes from Greg Kroah-Hartman:
       "Here are a number of small USB fixes for 3.4-rc5.
      
        Nothing major, as before, some USB gadget fixes.  There's a crash fix
        for a number of ASUS laptops on resume that had been reported by a
        number of different people.  We think the fix might also pertain to
        other machines, as this was a BIOS bug, and they seem to travel to
        different models and manufacturers quite easily.  Other than that,
        some other reported problems fixed as well."
      
      * tag 'usb-3.4-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
        usb: gadget: udc-core: fix incompatibility with dummy-hcd
        usb: gadget: udc-core: fix wrong call order
        USB: cdc-wdm: fix race leading leading to memory corruption
        USB: EHCI: fix crash during suspend on ASUS computers
        usb gadget: uvc: uvc_request_data::length field must be signed
        usb: gadget: dummy: do not call pullup() on udc_stop()
        usb: musb: davinci.c: add missing unregister
        usb: musb: drop __deprecated flag
        USB: gadget: storage gadgets send wrong error code for unknown commands
        usb: otg: gpio_vbus: Add otg transceiver events and notifiers
      8d7d1adc
  5. 28 Apr, 2012 18 commits
    • Linus Torvalds's avatar
      Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs · f7b00693
      Linus Torvalds authored
      Pull btrfs fixes from Chris Mason:
       "This has our collection of bug fixes.  I missed the last rc because I
        thought our patches were making NFS crash during my xfs test runs.
        Turns out it was an NFS client bug fixed by someone else while I tried
        to bisect it.
      
        All of these fixes are small, but some are fairly high impact.  The
        biggest are fixes for our mount -o remount handling, a deadlock due to
        GFP_KERNEL allocations in readdir, and a RAID10 error handling bug.
      
        This was tested against both 3.3 and Linus' master as of this morning."
      
      * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs: (26 commits)
        Btrfs: reduce lock contention during extent insertion
        Btrfs: avoid deadlocks from GFP_KERNEL allocations during btrfs_real_readdir
        Btrfs: Fix space checking during fs resize
        Btrfs: fix block_rsv and space_info lock ordering
        Btrfs: Prevent root_list corruption
        Btrfs: fix repair code for RAID10
        Btrfs: do not start delalloc inodes during sync
        Btrfs: fix that check_int_data mount option was ignored
        Btrfs: don't count CRC or header errors twice while scrubbing
        Btrfs: fix btrfs_ioctl_dev_info() crash on missing device
        btrfs: don't return EINTR
        Btrfs: double unlock bug in error handling
        Btrfs: always store the mirror we read the eb from
        fs/btrfs/volumes.c: add missing free_fs_devices
        btrfs: fix early abort in 'remount'
        Btrfs: fix max chunk size check in chunk allocator
        Btrfs: add missing read locks in backref.c
        Btrfs: don't call free_extent_buffer twice in iterate_irefs
        Btrfs: Make free_ipath() deal gracefully with NULL pointers
        Btrfs: avoid possible use-after-free in clear_extent_bit()
        ...
      f7b00693
    • Linus Torvalds's avatar
      Merge tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc · b990f9b3
      Linus Torvalds authored
      Pull ARM SoC fixes from Olof Johansson:
       "Nothing controversial, just another batch of fixes:
      
         - Samsung/exynos fixes for more merge window fallout: build errors
           and warnings mostly, but also some clock/device setup issues on
           exynos4/5
         - PXA bug and warning fixes related to gpio and pinmux
         - IRQ domain conversion bugfixes for U300 and MSM
         - A regulator setup fix for U300"
      
      * tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc:
        ARM: PXA2xx: MFP: fix potential direction bug
        ARM: PXA2xx: MFP: fix bug with MFP_LPM_KEEP_OUTPUT
        arm/sa1100: fix sa1100-rtc memory resource
        ARM: pxa: fix gpio wakeup setting
        ARM: SAMSUNG: add missing MMC_CAP2_BROKEN_VOLTAGE capability
        ARM: EXYNOS: Fix compilation error when CONFIG_OF is not defined
        ARM: EXYNOS: Fix resource on dev-dwmci.c
        ARM: S3C24XX: Fix build warning for S3C2410_PM
        ARM: mini2440_defconfig: Fix build error
        ARM: msm: Fix gic irqdomain support
        ARM: EXYNOS: Fix incorrect initialization of GIC
        ARM: EXYNOS: use 'exynos4-sdhci' as device name for sdhci controllers
        ARM: u300: bump all IRQ numbers by one
        ARM: ux300: Fix unimplementable regulation constraints
      b990f9b3
    • Linus Torvalds's avatar
      Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux · cd88e3a6
      Linus Torvalds authored
      Pull drm fixes from Dave Airlie:
       "As soon as I sent the non-urgent stack, two important fixes come in:
      
         - i915: fixes SNB GPU hangs in a number of 3D apps
      
         - radeon: initial fix for VGA on LLano system, 3 or 4 of us have
           spent time debugging this, and Jerome finally figured out the magic
           bit the BIOS/fglrx set that we didn't.  This at least should get
           things working, there may be future reliability fixes."
      
      * 'drm-fixes' of git://people.freedesktop.org/~airlied/linux:
        drm/i915: Set the Stencil Cache eviction policy to non-LRA mode.
        drm/radeon/kms: need to set up ss on DP bridges as well
      cd88e3a6
    • Linus Torvalds's avatar
      Revert "autofs: work around unhappy compat problem on x86-64" · fcbf94b9
      Linus Torvalds authored
      This reverts commit a32744d4.
      
      While that commit was technically the right thing to do, and made the
      x86-64 compat mode work identically to native 32-bit mode (and thus
      fixing the problem with a 32-bit systemd install on a 64-bit kernel), it
      turns out that the automount binaries had workarounds for this compat
      problem.
      
      Now, the workarounds are disgusting: doing an "uname()" to find out the
      architecture of the kernel, and then comparing it for the 64-bit cases
      and fixing up the size of the read() in automount for those.  And they
      were confused: it's not actually a generic 64-bit issue at all, it's
      very much tied to just x86-64, which has different alignment for an
      'u64' in 64-bit mode than in 32-bit mode.
      
      But the end result is that fixing the compat layer actually breaks the
      case of a 32-bit automount on a x86-64 kernel.
      
      There are various approaches to fix this (including just doing a
      "strcmp()" on current->comm and comparing it to "automount"), but I
      think that I will do the one that teaches pipes about a special "packet
      mode", which will allow user space to not have to care too deeply about
      the padding at the end of the autofs packet.
      
      That change will make the compat workaround unnecessary, so let's revert
      it first, and get automount working again in compat mode.  The
      packetized pipes will then fix autofs for systemd.
      Reported-and-requested-by: default avatarMichael Tokarev <mjt@tls.msk.ru>
      Cc: Ian Kent <raven@themaw.net>
      Cc: stable@kernel.org # for 3.3
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      fcbf94b9
    • Kenneth Graunke's avatar
      drm/i915: Set the Stencil Cache eviction policy to non-LRA mode. · 3a69ddd6
      Kenneth Graunke authored
      Clearing bit 5 of CACHE_MODE_0 is necessary to prevent GPU hangs in
      OpenGL programs such as Google MapsGL, Google Earth, and gzdoom when
      using separate stencil buffers.  Without it, the GPU tries to use the
      LRA eviction policy, which isn't supported.  This was supposed to be off
      by default, but seems to be on for many machines.
      
      This cannot be done in gen6_init_clock_gating with most of the other
      workaround bits; the render ring needs to exist.  Otherwise, the
      register write gets dropped on the floor (one printk will show it
      changed, but a second printk immediately following shows the value
      reverts to the old one).
      
      Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=47535
      Cc: stable@vger.kernel.org
      Cc: Rob Castle <futuredub@gmail.com>
      Cc: Eric Appleman <erappleman@gmail.com>
      Cc: aaron667@gmx.net
      Cc: Keith Packard <keithp@keithp.com>
      Signed-off-by: default avatarKenneth Graunke <kenneth@whitecape.org>
      Reviewed-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
      Acked-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
      Signed-off-by: default avatarDave Airlie <airlied@redhat.com>
      3a69ddd6
    • Alex Deucher's avatar
      drm/radeon/kms: need to set up ss on DP bridges as well · 700698e7
      Alex Deucher authored
      Makes Nutmeg DP to VGA bridges work for me.
      
      Fixes:
      https://bugs.freedesktop.org/show_bug.cgi?id=42490
      
      Noticed by Jerome Glisse (after weeks of debugging).
      Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
      Cc: stable@vger.kernel.org
      Signed-off-by: default avatarDave Airlie <airlied@redhat.com>
      700698e7
    • Linus Torvalds's avatar
      Merge git://git.samba.org/sfrench/cifs-2.6 · c629eaf8
      Linus Torvalds authored
      Pull CIFS fixes from Steve French.
      
      * git://git.samba.org/sfrench/cifs-2.6:
        Use correct conversion specifiers in cifs_show_options
        CIFS: Show backupuid/gid in /proc/mounts
        cifs: fix offset handling in cifs_iovec_write
      c629eaf8
    • Linus Torvalds's avatar
      Merge tag 'stable/for-linus-3.4-rc4-tag' of... · 4bbbf13f
      Linus Torvalds authored
      Merge tag 'stable/for-linus-3.4-rc4-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen
      
      Pull Xen fixes from Konrad Rzeszutek Wilk:
       "Some of these had been in existence since the 2.6.27 days, some since
        3.0 - and some due to new features added in v3.4.
      
        The one that is most interesting is David's one - in the low-level
        assembler code we had be checking events needlessly.  With his patch
        now we do it when the appropriate flag is set - with the added benefit
        that we can process events faster.  Stefano's is fixing a mistake
        where the Linux IRQ numbers were ACK-ed instead of the Xen IRQ,
        resulting in missing interrupts.  The other ones are bootup related
        that can show up on various hardware."
      
       - In the low-level assembler code we would jump to check events even if
         none were present.  This incorrect behavior had been there since
         2.6.27 days!
       - When using the fast-path for ACK-ing interrupts we were using the
         Linux IRQ numbers instead of the Xen ones (and they can differ) and
         missing interrupts in process.
       - Fix bootup crashes when ACPI hotplug CPUs were present and they would
         expand past the set number of CPUs we were allocated.
       - Deal with broken BIOSes when uploading C-states to the hypervisor.
       - Disable the cpuid check for MWAIT_LEAF if the ACPI PAD driver is
         loaded.  If the ACPI PAD driver is used it will crash, so lets not
         export the functionality so the ACPI PAD driver won't load.
      
      * tag 'stable/for-linus-3.4-rc4-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen:
        xen: correctly check for pending events when restoring irq flags
        xen/acpi: Workaround broken BIOSes exporting non-existing C-states.
        xen/smp: Fix crash when booting with ACPI hotplug CPUs.
        xen: use the pirq number to check the pirq_eoi_map
        xen/enlighten: Disable MWAIT_LEAF so that acpi-pad won't be loaded.
      4bbbf13f
    • Linus Torvalds's avatar
      Merge tag 'spi-for-linus' of git://git.secretlab.ca/git/linux-2.6 · 84c6a81b
      Linus Torvalds authored
      Pull misc SPI device driver bug fixes from Grant Likely.
      
      * tag 'spi-for-linus' of git://git.secretlab.ca/git/linux-2.6:
        spi/spi-bfin5xx: Fix flush of last bit after each spi transfer
        spi/spi-bfin5xx: fix reversed if condition in interrupt mode
        spi/spi_bfin_sport: drop bits_per_word from client data
        spi/bfin_spi: drop bits_per_word from client data
        spi/spi-bfin-sport: move word length setup to transfer handler
        spi/bfin5xx: rename config macro name for bfin5xx spi controller driver
        spi/pl022: Allow request for higher frequency than maximum possible
        spi/bcm63xx: set master driver mode_bits.
        spi/bcm63xx: don't use the stopping state
        spi/bcm63xx: convert to the pump message infrastructure
        spi/spi-ep93xx.c: use dma_transfer_direction instead of dma_data_direction
        spi: fix spi.h kernel-doc warning
        spi/pl022: Fix calculate_effective_freq()
        spi/pl022: Fix range checking for bits per word
      84c6a81b
    • Linus Torvalds's avatar
      Merge tag 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging · 9f7e2f90
      Linus Torvalds authored
      Pull hwmon patches from Guenter Roeck:
       - Fix build warning in ad7314 driver
       - Fix pci_device_id array access in fam15h_power driver, introduced by
         commit 00250ec9 ("hwmon: fam15h_power: fix bogus values with
         current BIOSes")
      
      * tag 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging:
        hwmon: (fam15h_power) Fix pci_device_id array
        hwmon: (ad7314) Fix build warning
      9f7e2f90
    • Linus Torvalds's avatar
      Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux · a882a4d0
      Linus Torvalds authored
      Pull drm fixes from Dave Airlie:
       "For your Friday pull request stack, nothing astounding or shattering
        this week some exynos, some intel, some radeon fixes.  One intel fix
        for a regression somwehere back in 2.6.35 land."
      
      * 'drm-fixes' of git://people.freedesktop.org/~airlied/linux:
        drm/radeon/kms: use frac fb div on APUs
        drm/radeon: add a missing entry to encoder_names
        drm/i915: handle input/output sdvo timings separately in mode_set
        drm/i915: fix integer overflow in i915_gem_do_execbuffer()
        drm/i915: fix integer overflow in i915_gem_execbuffer2()
        drm/exynos: added missed vm area region mapping type.
        drm/exynos: fixed exynos_drm_gem_map_pages bug.
        drm/exynos: fixed duplicatd memory allocation bug.
        drm/i915: fixup load-detect on enabled, but not active pipe
      a882a4d0
    • Linus Torvalds's avatar
      Merge branch 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 78e97a47
      Linus Torvalds authored
      Pull RCU fix from Ingo Molnar.
      
      * 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        rcu: Permit call_rcu() from CPU_DYING notifiers
      78e97a47
    • Linus Torvalds's avatar
      Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · c28c4851
      Linus Torvalds authored
      Pull x86 fixes from Ingo Molnar.
      
      * 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        x86/apic: Use x2apic physical mode based on FADT setting
        x86/mrst: Quiet sparse noise about plain integer as NULL pointer
        x86, intel_cacheinfo: Fix error return code in amd_set_l3_disable_slot()
      c28c4851
    • Linus Torvalds's avatar
      Merge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · daae677f
      Linus Torvalds authored
      Pull scheduler fixes from Ingo Molnar.
      
      * 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        sched: Fix OOPS when build_sched_domains() percpu allocation fails
        sched: Fix more load-balancing fallout
      daae677f
    • Linus Torvalds's avatar
      Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 06fc5d3d
      Linus Torvalds authored
      Pull perf fixes from Ingo Molnar.
      
      * 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        perf: Fix perf_event_for_each() to use sibling
        perf symbols: Read plt symbols from proper symtab_type binary
        tracing: Fix stacktrace of latency tracers (irqsoff and friends)
        perf tools: Add 'G' and 'H' modifiers to event parsing
        tracing: Fix regression with tracing_on
        perf tools: Drop CROSS_COMPILE from flex and bison calls
        perf report: Fix crash showing warning related to kernel maps
        tracing: Fix build breakage without CONFIG_PERF_EVENTS (again)
      06fc5d3d
    • Linus Torvalds's avatar
      Merge branch 'for-v3.4-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux · f6072452
      Linus Torvalds authored
      Pull build fixes for less mainstream architectures from Paul Gortmaker:
       "These are fixes for frv(1), blackfin(2), powerpc(1) and xtensa(4).
      
        Fortunately the touches are nearly all specific to files just used by
        the arch in question.  The two touches to shared/common files
        [kernel/irq/debug.h and drivers/pci/Makefile] are trivial to assess as
        no risk to anyone.
      
        Half of them relate to xtensa directly.  It was only when I fixed the
        last xtensa issue that I realized that the arch has been broken for a
        significant time, and isn't a specific v3.4 regression.  So if you
        wanted, we could leave xtensa lying bleeding in the street for a
        couple more weeks and queue those for 3.5.  But given they are no risk
        to anyone outside of xtensa, I figured to just leave them in.
      
        If you are OK with taking the xtensa fixes, then please pull to get:
      
         - one last implicit include uncovered by system.h that is in a file
           specific to just one powerpc defconfig.  (I'd sync'd with BenH).
      
         - fix an oversight in the PCI makefile where shared code wasn't being
           compiled for ARCH=frv
      
         - fix a missing include for GPIO in blackfin framebuffer.
      
         - audit and tag endif in blackfin ezkit board file, in order to find
           and fix the misplaced endif masking a block of code.
      
         - fix irq/debug.h choice of temporary macro names to be more internal
           so they don't conflict with names used by xtensa.
      
         - fix a reference to an undeclared local var in xtensa's signal.c
      
         - fix an implicit bug.h usage in xtensa's asm/io.h uncovered by my
           removing bug.h from kernel.h
      
         - fix xtensa to properly indicate it is using asm-generic/hardirq.h
           in order to resolve the link error - undefined ack_bad_irq
      
        The xtensa still fails final link as my latest binutils does something
        evil when ld forward-relocates unlikely() blocks, but in theory people
        who have older/valid toolchains could now use the thing."
      
      * 'for-v3.4-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux:
        xtensa: fix build fail on undefined ack_bad_irq
        blackfin: fix ifdef fustercluck in mach-bf538/boards/ezkit.c
        blackfin: fix compile error in bfin-lq035q1-fb.c
        pci: frv architecture needs generic setup-bus infrastructure
        irq: hide debug macros so they don't collide with others.
        xtensa: fix build error in xtensa/include/asm/io.h
        xtensa: fix build failure in xtensa/kernel/signal.c
        powerpc: fix system.h fallout in sysdev/scom.c [chroma_defconfig]
      f6072452
    • Linus Torvalds's avatar
      Merge tag 'sh-for-linus' of git://github.com/pmundt/linux-sh · d7e69bc7
      Linus Torvalds authored
      Pull SuperH fixes from Paul Mundt.
      
      * tag 'sh-for-linus' of git://github.com/pmundt/linux-sh:
        sh: Fix up tracepoint build fallout from static key introduction.
        sh: Fix error synchronising kernel page tables
      d7e69bc7
    • Linus Torvalds's avatar
      Merge branch 'docs-3.4' of git://git.samba.org/jlayton/linux · 9c687702
      Linus Torvalds authored
      Pull security key doc update from Jeff Layton:
       "Ordinarily, I send my patches through others' trees, but David
        suggested I just send this one to you directly since it's just a
        Documentation/ update"
      
      * 'docs-3.4' of git://git.samba.org/jlayton/linux:
        keys: update the documentation with info about "logon" keys
      9c687702
  6. 27 Apr, 2012 7 commits