1. 30 Nov, 2013 6 commits
    • Tejun Heo's avatar
      sysfs, kernfs: prepare mmap path for kernfs · fdbffaa4
      Tejun Heo authored
      
      
      We're in the process of separating out core sysfs functionality into
      kernfs which will deal with sysfs_dirents directly.  This patch
      rearranges mmap path so that the kernfs and sysfs parts are separate.
      
      sysfs_kf_bin_mmap() which handles the interaction with bin_attribute
      mmap method is factored out of sysfs_bin_mmap(), which is renamed to
      kernfs_file_mmap().  All vma ops are renamed accordingly.
      
      sysfs_bin_mmap() is updated such that it can be used for both file
      types.  This will eventually allow using the same file_operations for
      both file types, which is necessary to separate out kernfs.
      
      This patch doesn't introduce any behavior changes.
      Signed-off-by: default avatarTejun Heo <tj@kernel.org>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      fdbffaa4
    • Tejun Heo's avatar
      sysfs, kernfs: prepare write path for kernfs · 50b38ca0
      Tejun Heo authored
      
      
      We're in the process of separating out core sysfs functionality into
      kernfs which will deal with sysfs_dirents directly.  This patch
      rearranges write path so that the kernfs and sysfs parts are separate.
      
      kernfs_file_write() handles all boilerplate work including buffer
      management and locking and invokes sysfs_kf_write() or
      sysfs_kf_bin_write() depending on the file type which deals with the
      interaction with kobj store or bin_attribute write method.
      
      While this patch changes the order of some operations, it shouldn't
      change any visible behavior.
      Signed-off-by: default avatarTejun Heo <tj@kernel.org>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      50b38ca0
    • Tejun Heo's avatar
      sysfs, kernfs: prepare read path for kernfs · c2b19daf
      Tejun Heo authored
      
      
      We're in the process of separating out core sysfs functionality into
      kernfs which will deal with sysfs_dirents directly.  This patch
      rearranges read path so that the kernfs and sysfs parts are separate.
      
      * Regular file read path is refactored such that
        kernfs_seq_start/next/stop/show() handle all the boilerplate work
        including locking and updating event count for poll, while
        sysfs_kf_seq_show() deals with interaction with kobj show method.
      
      * Bin file read path is refactored such that kernfs_file_direct_read()
        handles all the boilerplate work including buffer management and
        locking, while sysfs_kf_bin_read() deals with interaction with
        bin_attribute read method.
      
      kernfs_file_read() is added.  It invokes either the seq_file or direct
      read path depending on the file type.  This will eventually allow
      using the same file_operations for both file types, which is necessary
      to separate out kernfs.
      
      While this patch changes the order of some operations, it shouldn't
      change any visible behavior.
      
      v2: Dropped unnecessary zeroing of @count from sysfs_kf_seq_show().
          Add comments explaining single_open() behavior.  Both suggested by
          Pavel.
      
      v3: seq_stop() is called even after seq_start() failed.
          kernfs_seq_start() updated so that it doesn't unlock
          sysfs_open_file->mutex on failure so that kernfs_seq_stop()
          doesn't try to unlock an already unlocked mutex.  Reported by
          Fengguang.
      Signed-off-by: default avatarTejun Heo <tj@kernel.org>
      Cc: Pavel Machek <pavel@ucw.cz>
      Cc: Fengguang Wu <fengguang.wu@intel.com>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      c2b19daf
    • Tejun Heo's avatar
      sysfs, kernfs: introduce kernfs_create_dir[_ns]() · 93b2b8e4
      Tejun Heo authored
      
      
      Introduce kernfs interface to manipulate a directory which takes and
      returns sysfs_dirents.
      
      create_dir() is renamed to kernfs_create_dir_ns() and its argumantes
      and return value are updated.  create_dir() usages are replaced with
      kernfs_create_dir_ns() and sysfs_create_subdir() usages are replaced
      with kernfs_create_dir().  Dup warnings are handled explicitly by
      sysfs users of the kernfs interface.
      
      sysfs_enable_ns() is renamed to kernfs_enable_ns().
      
      This patch doesn't introduce any behavior changes.
      
      v2: Dummy implementation for !CONFIG_SYSFS updated to return -ENOSYS.
      
      v3: kernfs_enable_ns() added.
      
      v4: Refreshed on top of "sysfs: drop kobj_ns_type handling, take #2"
          so that this patch removes sysfs_enable_ns().
      Signed-off-by: default avatarTejun Heo <tj@kernel.org>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      93b2b8e4
    • Tejun Heo's avatar
      sysfs, kernfs: replace sysfs_dirent->s_dir.kobj and ->s_attr.[bin_]attr with ->priv · 7c6e2d36
      Tejun Heo authored
      
      
      A directory sysfs_dirent points to the associated kobj.  A regular or
      bin file points to the associated [bin_]attribute.  This patch
      replaces sysfs_dirent->s_dir.kobj and ->s_attr.[bin_]attr with void *
      ->priv.
      
      This is to prepare for kernfs interface so that sysfs can specify the
      private data in the same way for directories and files.  This lower
      debuggability but not by much - the whole thing was overlaid in a
      union anyway.  If debuggability becomes an issue, we can later add
      ->priv accessors which explicitly check for the sysfs_dirent type and
      performs casting.
      
      This patch doesn't introduce any behavior difference.
      Signed-off-by: default avatarTejun Heo <tj@kernel.org>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      7c6e2d36
    • Greg Kroah-Hartman's avatar
      Merge 3.13-rc2 into driver-core-next · 45b45393
      Greg Kroah-Hartman authored
      
      
      We want those fixes in here as well.
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      45b45393
  2. 29 Nov, 2013 13 commits
    • Linus Torvalds's avatar
      Linux 3.13-rc2 · dc1ccc48
      Linus Torvalds authored
      dc1ccc48
    • Linus Torvalds's avatar
      Merge tag 'arm64-stable' of git://git.kernel.org/pub/scm/linux/kernel/git/cmarinas/linux-aarch64 · d5ff835f
      Linus Torvalds authored
      Pull ARM64 fixes from Catalin Marinas:
       - Remove preempt_count modifications in the arm64 IRQ handling code
         since that's already dealt with in generic irq_enter/irq_exit
       - PTE_PROT_NONE bit moved higher up to avoid overlapping with the
         hardware bits (for PROT_NONE mappings which are pte_present)
       - Big-endian fixes for ptrace support
       - Asynchronous aborts unmasking while in the kernel
       - pgprot_writecombine() change to create Normal NonCacheable memory
         rather than Device GRE
      
      * tag 'arm64-stable' of git://git.kernel.org/pub/scm/linux/kernel/git/cmarinas/linux-aarch64:
        arm64: Move PTE_PROT_NONE higher up
        arm64: Use Normal NonCacheable memory for writecombine
        arm64: debug: make aarch32 bkpt checking endian clean
        arm64: ptrace: fix compat registes get/set to be endian clean
        arm64: Unmask asynchronous aborts when in kernel mode
        arm64: dts: Reserve the memory used for secondary CPU release address
        arm64: let the core code deal with preempt_count
      d5ff835f
    • Linus Torvalds's avatar
      Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux · 033dbbde
      Linus Torvalds authored
      Pull s390 updates from Martin Schwidefsky:
       "One performance improvement and a few bug fixes.  Two of the fixes
        deal with the clock related problems we have seen on recent kernels"
      
      * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
        s390/mm: handle asce-type exceptions as normal page fault
        s390,time: revert direct ktime path for s390 clockevent device
        s390/time,vdso: convert to the new update_vsyscall interface
        s390/uaccess: add missing page table walk range check
        s390/mm: optimize copy_page
        s390/dasd: validate request size before building CCW/TCW request
        s390/signal: always restore saved runtime instrumentation psw bit
      033dbbde
    • Linus Torvalds's avatar
      Merge branch 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux · dc418f6e
      Linus Torvalds authored
      Pull i2c fixes from Wolfram Sang:
       "Some easy but needed fixes for i2c drivers since rc1"
      
      * 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
        i2c: bcm2835: Linking platform nodes to adapter nodes
        i2c: omap: raw read and write endian fix
        i2c: i2c-bcm-kona: Fix module build
        i2c: i2c-diolan-u2c: different usb endpoints for DLN-2-U2C
        i2c: bcm-kona: remove duplicated include
        i2c: davinci: raw read and write endian fix
      dc418f6e
    • Linus Torvalds's avatar
      Merge branch 'for-3.13-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq · 7224b31b
      Linus Torvalds authored
      Pull workqueue fixes from Tejun Heo:
       "This contains one important fix.  The NUMA support added a while back
        broke ordering guarantees on ordered workqueues.  It was enforced by
        having single frontend interface with @max_active == 1 but the NUMA
        support puts multiple interfaces on unbound workqueues on NUMA
        machines thus breaking the ordered guarantee.  This is fixed by
        disabling NUMA support on ordered workqueues.
      
        The above and a couple other patches were sitting in for-3.12-fixes
        but I forgot to push that out, so they ended up waiting a bit too
        long.  My aplogies.
      
        Other fixes are minor"
      
      * 'for-3.13-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq:
        workqueue: fix pool ID allocation leakage and remove BUILD_BUG_ON() in init_workqueues
        workqueue: fix comment typo for __queue_work()
        workqueue: fix ordered workqueues in NUMA setups
        workqueue: swap set_cpus_allowed_ptr() and PF_NO_SETAFFINITY
      7224b31b
    • Linus Torvalds's avatar
      Merge branch 'for-3.13-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata · de92a058
      Linus Torvalds authored
      Pull libata fixes from Tejun Heo:
       "libata device removal path was removing parent device node before its
        child, which is mostly harmless but triggers warning after recent
        sysfs changes.  Rafael's patch fixes the order.
      
        Other than that, minor controller-specific fixes and device ID
        additions"
      
      * 'for-3.13-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata:
        ATA: Fix port removal ordering
        ahci: add Marvell 9230 to the AHCI PCI device list
        ata: fix acpi_bus_get_device() return value check
        pata_arasan_cf: add missing clk_disable_unprepare() on error path
        ahci: add support for IBM Akebono platform device
      de92a058
    • Linus Torvalds's avatar
      Merge branch 'for-3.13-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup · 2855987d
      Linus Torvalds authored
      Pull cgroup fixes from Tejun Heo:
       "Fixes for three issues.
      
         - cgroup destruction path could swamp system_wq possibly leading to
           deadlock.  This actually seems to happen in the wild with memcg
           because memcg destruction path adds nested dependency on system_wq.
      
           Resolved by isolating cgroup destruction work items on its
           dedicated workqueue.
      
         - Possible locking context deadlock through seqcount reported by
           lockdep
      
         - Memory leak under certain conditions"
      
      * 'for-3.13-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup:
        cgroup: fix cgroup_subsys_state leak for seq_files
        cpuset: Fix memory allocator deadlock
        cgroup: use a dedicated workqueue for cgroup destruction
      2855987d
    • Linus Torvalds's avatar
      Merge tag 'sound-3.13-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound · b8495995
      Linus Torvalds authored
      Pull sound fixes from Takashi Iwai:
       "Quite a few HD-Audio fixes, a WUSB audio fix and a fix for FireWire
        audio.  The HD-audio part contains a couple of fixes for the generic
        parser, and these are the only intrusive fixes.  The rest are mostly
        device-specific fixes"
      
      * tag 'sound-3.13-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
        ALSA: hda - Add LFE chmap to ASUS ET2700
        ALSA: hda - Initialize missing bass speaker pin for ASUS AIO ET2700
        ALSA: hda - limit mic boost on Asus UX31[A,E]
        ALSA: hda - Check leaf nodes to find aamix amps
        ALSA: hda - Fix hp-mic mode without VREF bits
        ALSA: hda - Create Headhpone Mic Jack Mode when really needed
        ALSA: usb: use multiple packets per urb for Wireless USB inbound audio
        ALSA: hda - Enable mute/mic-mute LEDs for more Thinkpads with Conexant codec
        ALSA: hda - Drop bus->avoid_link_reset flag
        ALSA: hda/realtek - Set pcbeep amp for ALC668
        ALSA: hda/realtek - Add support of ALC231 codec
        ALSA: firewire-lib: fix wrong value for FDF field as an empty packet
      b8495995
    • Linus Torvalds's avatar
      Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs · b01537bf
      Linus Torvalds authored
      Pull vfs dentry reference count fix from Al Viro.
      
      This fixes a possible inode_permission NULL pointer dereference (and
      other problems) that were due to the root dentry count being decremented
      too much.  In commit 48a066e7 ("RCU'd vfsmounts") the placement of
      clearing the LOOKUP_RCU bit changed, and we then returned failure of
      incrementing the lockref on the parent dentry with LOOKUP_RCU cleared.
      
      But that meant we needed to go through the same cleanup routines that
      the later failures did wrt LOOKUP_ROOT and nd->root.
      
      * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
        fix bogus path_put() of nd->root after some unlazy_walk() failures
      b01537bf
    • Linus Torvalds's avatar
      Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux · 282c183b
      Linus Torvalds authored
      Pull drm qxl leak fix from Dave Airlie:
       "As usual 5 mins after I send a trivial pull fix I find a real bug!
      
        This fixes a memory leak and I'd like to get it into stable queue
        asap"
      
      * 'drm-fixes' of git://people.freedesktop.org/~airlied/linux:
        drm/qxl: fix memory leak in release list handling
      282c183b
    • Catalin Marinas's avatar
      arm64: Move PTE_PROT_NONE higher up · 3676f9ef
      Catalin Marinas authored
      PTE_PROT_NONE means that a pte is present but does not have any
      read/write attributes. However, setting the memory type like
      pgprot_writecombine() is allowed and such bits overlap with
      PTE_PROT_NONE. This causes mmap/munmap issues in drivers that change the
      vma->vm_pg_prot on PROT_NONE mappings.
      
      This patch reverts the PTE_FILE/PTE_PROT_NONE shift in commit
      59911ca4
      
       (ARM64: mm: Move PTE_PROT_NONE bit) and moves PTE_PROT_NONE
      together with the other software bits.
      Signed-off-by: default avatarSteve Capper <steve.capper@linaro.org>
      Signed-off-by: default avatarCatalin Marinas <catalin.marinas@arm.com>
      Tested-by: default avatarSteve Capper <steve.capper@linaro.org>
      Cc: <stable@vger.kernel.org> # 3.11+
      3676f9ef
    • Catalin Marinas's avatar
      arm64: Use Normal NonCacheable memory for writecombine · 4f00130b
      Catalin Marinas authored
      
      
      This provides better performance compared to Device GRE and also allows
      unaligned accesses. Such memory is intended to be used with standard RAM
      (e.g. framebuffers) and not I/O.
      Signed-off-by: default avatarCatalin Marinas <catalin.marinas@arm.com>
      4f00130b
    • Al Viro's avatar
      fix bogus path_put() of nd->root after some unlazy_walk() failures · d870b4a1
      Al Viro authored
      
      
      Failure to grab reference to parent dentry should go through the
      same cleanup as nd->seq mismatch.  As it is, we might end up with
      caller thinking it needs to path_put() nd->root, with obvious
      nasty results once we'd hit that bug enough times to drive the
      refcount of root dentry all the way to zero...
      Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
      d870b4a1
  3. 28 Nov, 2013 21 commits