1. 30 4月, 2012 10 次提交
    • G
      powerpc/pseries: Rivet CONFIG_EEH for pSeries platform · e49f7a99
      Gavin Shan 提交于
      Recently, Ryan Wang tried to compile PPC pSeries platform without
      CONFIG_EEH and eventually run into errors. Nishanth Aravamudan
      helped to narrow down the root cause. Actually, the pSeries platform
      depends on CONFIG_EEH heavily and that won't work properly without
      EEH support.
      
      According to Ben's suggestion, the patch make CONFIG_EEH invisible
      and keep it as always selected on pSeries platform.
      Signed-off-by: NGavin Shan <shangw@linux.vnet.ibm.com>
      Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
      e49f7a99
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      powerpc/irqdomain: Fix broken NR_IRQ references · 4013369f
      Grant Likely 提交于
      The switch from using irq_map to irq_alloc_desc*() for managing irq
      number allocations introduced new bugs in some of the powerpc
      interrupt code.  Several functions rely on the value of NR_IRQS to
      determine the maximum irq number that could get allocated.  However,
      with sparse_irq and using irq_alloc_desc*() the maximum possible irq
      number is now specified with 'nr_irqs' which may be a number larger
      than NR_IRQS.  This has caused breakage on powermac when
      CONFIG_NR_IRQS is set to 32.
      
      This patch removes most of the direct references to NR_IRQS in the
      powerpc code and replaces them with either a nr_irqs reference or by
      using the common for_each_irq_desc() macro.  The powerpc-specific
      for_each_irq() macro is removed at the same time.
      
      Also, the Cell axon_msi driver is refactored to remove the global
      build assumption on the size of NR_IRQS and instead add a limit to the
      maximum irq number when calling irq_domain_add_nomap().
      Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>
      Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
      4013369f
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      powerpc/8xx: Fix NR_IRQ bugs and refactor 8xx interrupt controller · 8751ed14
      Grant Likely 提交于
      The mpc8xx driver uses a reference to NR_IRQS that is buggy.  It uses
      NR_IRQs for the array size of the ppc_cached_irq_mask bitmap, but
      NR_IRQs could be smaller than the number of hardware irqs that
      ppc_cached_irq_mask tracks.
      
      Also, while fixing that problem, it became apparent that the interrupt
      controller only supports 32 interrupt numbers, but it is written as if
      it supports multiple register banks which is more complicated.
      
      This patch pulls out the buggy reference to NR_IRQs and fixes the size
      of the ppc_cached_irq_mask to match the number of HW irqs.  It also
      drops the now-unnecessary code since ppc_cached_irq_mask is no longer
      an array.
      Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>
      Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
      8751ed14
    • L
      Linux 3.4-rc5 · 69964ea4
      Linus Torvalds 提交于
      69964ea4
    • L
      Merge tag 'pm-for-3.4-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm · 6cfdd02b
      Linus Torvalds 提交于
      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
    • L
      autofs: make the autofsv5 packet file descriptor use a packetized pipe · 64f371bc
      Linus Torvalds 提交于
      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: NMichael 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: NLinus Torvalds <torvalds@linux-foundation.org>
      64f371bc
    • M
      PM / Freezer / Docs: Update documentation about freezing of tasks · 26e0f90f
      Marcos Paulo de Souza 提交于
      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: NMarcos Paulo de Souza <marcos.souza.org@gmail.com>
      Signed-off-by: NSrivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
      Signed-off-by: NRafael J. Wysocki <rjw@sisk.pl>
      26e0f90f
    • L
      pipes: add a "packetized pipe" mode for writing · 9883035a
      Linus Torvalds 提交于
      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: NMichael 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: NLinus Torvalds <torvalds@linux-foundation.org>
      9883035a
    • L
      Merge tag 'staging-3.4-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging · de9e24ed
      Linus Torvalds 提交于
      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
    • L
      Merge tag 'usb-3.4-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb · 8d7d1adc
      Linus Torvalds 提交于
      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
  2. 29 4月, 2012 3 次提交
    • L
      Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs · f7b00693
      Linus Torvalds 提交于
      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
    • L
      Merge tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc · b990f9b3
      Linus Torvalds 提交于
      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
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      Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux · cd88e3a6
      Linus Torvalds 提交于
      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
  3. 28 4月, 2012 27 次提交