1. 18 Aug, 2015 3 commits
  2. 11 Aug, 2015 1 commit
  3. 04 Aug, 2015 1 commit
  4. 01 Aug, 2015 1 commit
    • Russell King's avatar
      ARM: reduce visibility of dmac_* functions · 1234e3fd
      Russell King authored
      The dmac_* functions are private to the ARM DMA API implementation, and
      should not be used by drivers.  In order to discourage their use, remove
      their prototypes and macros from asm/*.h.
      
      We have to leave dmac_flush_range() behind as Exynos and MSM IOMMU code
      use these; once these sites are fixed, this can be moved also.
      Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
      1234e3fd
  5. 31 Jul, 2015 2 commits
    • Will Deacon's avatar
      ARM: 8407/1: switch_to: Remove finish_arch_switch · 9ac87c5a
      Will Deacon authored
      Fold finish_arch_switch() into switch_to(), in preparation for the
      removal of the finish_arch_switch call from core sched code.
      Signed-off-by: default avatarWill Deacon <will.deacon@arm.com>
      Signed-off-by: default avatarPeter Zijlstra (Intel) <peterz@infradead.org>
      Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
      9ac87c5a
    • Stephen Boyd's avatar
      ARM: 8392/3: smp: Only expose /sys/.../cpuX/online if hotpluggable · 787047ee
      Stephen Boyd authored
      Writes to /sys/.../cpuX/online fail if we determine the platform
      doesn't support hotplug for that CPU. Furthermore, if the cpu_die
      op isn't specified the system hangs when we try to offline a CPU
      and it comes right back online unexpectedly. Let's figure this
      stuff out before we make the sysfs nodes so that the online file
      doesn't even exist if it isn't (at least sometimes) possible to
      hotplug the CPU.
      
      Add a new 'cpu_can_disable' op and repoint all 'cpu_disable'
      implementations at it because all implementers use the op to
      indicate if a CPU can be hotplugged or not in a static fashion.
      With PSCI we may need to add a 'cpu_disable' op so that the
      secure OS can be migrated off the CPU we're trying to hotplug.
      In this case, the 'cpu_can_disable' op will indicate that all
      CPUs are hotpluggable by returning true, but the 'cpu_disable' op
      will make a PSCI migration call and occasionally fail, denying
      the hotplug of a CPU. This shouldn't be any worse than x86 where
      we may indicate that all CPUs are hotpluggable but occasionally
      we can't offline a CPU due to check_irq_vectors_for_cpu_disable()
      failing to find a CPU to move vectors to.
      
      Cc: Mark Rutland <mark.rutland@arm.com>
      Cc: Nicolas Pitre <nico@linaro.org>
      Cc: Dave Martin <Dave.Martin@arm.com>
      Acked-by: Simon Horman <horms@verge.net.au> [shmobile portion]
      Tested-by: default avatarSimon Horman <horms@verge.net.au>
      Cc: Magnus Damm <magnus.damm@gmail.com>
      Cc: <linux-sh@vger.kernel.org>
      Tested-by: default avatarTyler Baker <tyler.baker@linaro.org>
      Cc: Geert Uytterhoeven <geert@linux-m68k.org>
      Signed-off-by: default avatarStephen Boyd <sboyd@codeaurora.org>
      Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
      787047ee
  6. 10 Jul, 2015 3 commits
    • Will Deacon's avatar
      ARM: 8403/1: kbuild: don't use generic mcs_spinlock.h header · 57853e89
      Will Deacon authored
      We provide our own implementation of asm/mcs_spinlock.h, so there's no
      need to ask for the (empty) generic version.
      Signed-off-by: default avatarWill Deacon <will.deacon@arm.com>
      Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
      57853e89
    • Stephen Boyd's avatar
      ARM: 8401/1: perf: Set affinity for PPI based PMUs · 8ded1e1a
      Stephen Boyd authored
      For PPI based PMUs, we bail out early in of_pmu_irq_cfg() without
      setting the PMU's supported_cpus bitmap. This causes the
      smp_call_function_any() in armv7_probe_num_events() to fail. Set
      the bitmap to be all CPUs so that we properly probe PMUs that use
      PPIs.
      
      Fixes: cc88116d ("arm: perf: treat PMUs as CPU affine")
      Cc: Mark Rutland <mark.rutland@arm.com>
      Signed-off-by: default avatarStephen Boyd <sboyd@codeaurora.org>
      Signed-off-by: default avatarWill Deacon <will.deacon@arm.com>
      Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
      8ded1e1a
    • Geert Uytterhoeven's avatar
      ARM: 8395/1: l2c: Add support for the "arm,shared-override" property · eeedcea6
      Geert Uytterhoeven authored
      "CoreLink Level 2 Cache Controller L2C-310", p. 2-15, section 2.3.2
      Shareable attribute" states:
      
          "The default behavior of the cache controller with respect to the
           shareable attribute is to transform Normal Memory Non-cacheable
           transactions into:
              - cacheable no allocate for reads
              - write through no write allocate for writes."
      
      Depending on the system architecture, this may cause memory corruption
      in the presence of bus mastering devices (e.g. OHCI). To avoid such
      corruption, the default behavior can be disabled by setting the Shared
      Override bit in the Auxiliary Control register.
      
      Currently the Shared Override bit can be set only using C code:
        - by calling l2x0_init() directly, which is deprecated,
        - by setting/clearing the bit in the machine_desc.l2c_aux_val/mask
          fields, but using values differing from 0/~0 is also deprecated.
      
      Hence add support for an "arm,shared-override" device tree property for
      the l2c device node. By specifying this property, affected systems can
      indicate that non-cacheable transactions must not be transformed.
      Then, it's up to the OS to decide. The current behavior is to set the
      "shared attribute override enable" bit, as there may exist kernel linear
      mappings and cacheable aliases for the DMA buffers, even if CMA is
      enabled.
      
      See also commit 1a8e41cd ("ARM: 6395/1: VExpress: Set bit 22 in
      the PL310 (cache controller) AuxCtlr register"):
      
          "Clearing bit 22 in the PL310 Auxiliary Control register (shared
           attribute override enable) has the side effect of transforming
           Normal Shared Non-cacheable reads into Cacheable no-allocate reads.
      
           Coherent DMA buffers in Linux always have a Cacheable alias via the
           kernel linear mapping and the processor can speculatively load
           cache lines into the PL310 controller. With bit 22 cleared,
           Non-cacheable reads would unexpectedly hit such cache lines leading
           to buffer corruption."
      Signed-off-by: default avatarGeert Uytterhoeven <geert+renesas@glider.be>
      Acked-by: default avatarCatalin Marinas <catalin.marinas@arm.com>
      Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
      eeedcea6
  7. 05 Jul, 2015 4 commits
    • Linus Torvalds's avatar
      Linux 4.2-rc1 · d770e558
      Linus Torvalds authored
      d770e558
    • Linus Torvalds's avatar
      Merge tag 'platform-drivers-x86-v4.2-2' of... · a585d2b7
      Linus Torvalds authored
      Merge tag 'platform-drivers-x86-v4.2-2' of git://git.infradead.org/users/dvhart/linux-platform-drivers-x86
      
      Pull late x86 platform driver updates from Darren Hart:
       "The following came in a bit later and I wanted them to bake in next a
        few more days before submitting, thus the second pull.
      
        A new intel_pmc_ipc driver, a symmetrical allocation and free fix in
        dell-laptop, a couple minor fixes, and some updated documentation in
        the dell-laptop comments.
      
        intel_pmc_ipc:
         - Add Intel Apollo Lake PMC IPC driver
      
        tc1100-wmi:
         - Delete an unnecessary check before the function call "kfree"
      
        dell-laptop:
         - Fix allocating & freeing SMI buffer page
         - Show info about WiGig and UWB in debugfs
         - Update information about wireless control"
      
      * tag 'platform-drivers-x86-v4.2-2' of git://git.infradead.org/users/dvhart/linux-platform-drivers-x86:
        intel_pmc_ipc: Add Intel Apollo Lake PMC IPC driver
        tc1100-wmi: Delete an unnecessary check before the function call "kfree"
        dell-laptop: Fix allocating & freeing SMI buffer page
        dell-laptop: Show info about WiGig and UWB in debugfs
        dell-laptop: Update information about wireless control
      a585d2b7
    • Linus Torvalds's avatar
      Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs · 1dc51b82
      Linus Torvalds authored
      Pull more vfs updates from Al Viro:
       "Assorted VFS fixes and related cleanups (IMO the most interesting in
        that part are f_path-related things and Eric's descriptor-related
        stuff).  UFS regression fixes (it got broken last cycle).  9P fixes.
        fs-cache series, DAX patches, Jan's file_remove_suid() work"
      
      [ I'd say this is much more than "fixes and related cleanups".  The
        file_table locking rule change by Eric Dumazet is a rather big and
        fundamental update even if the patch isn't huge.   - Linus ]
      
      * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (49 commits)
        9p: cope with bogus responses from server in p9_client_{read,write}
        p9_client_write(): avoid double p9_free_req()
        9p: forgetting to cancel request on interrupted zero-copy RPC
        dax: bdev_direct_access() may sleep
        block: Add support for DAX reads/writes to block devices
        dax: Use copy_from_iter_nocache
        dax: Add block size note to documentation
        fs/file.c: __fget() and dup2() atomicity rules
        fs/file.c: don't acquire files->file_lock in fd_install()
        fs:super:get_anon_bdev: fix race condition could cause dev exceed its upper limitation
        vfs: avoid creation of inode number 0 in get_next_ino
        namei: make set_root_rcu() return void
        make simple_positive() public
        ufs: use dir_pages instead of ufs_dir_pages()
        pagemap.h: move dir_pages() over there
        remove the pointless include of lglock.h
        fs: cleanup slight list_entry abuse
        xfs: Correctly lock inode when removing suid and file capabilities
        fs: Call security_ops->inode_killpriv on truncate
        fs: Provide function telling whether file_remove_privs() will do anything
        ...
      1dc51b82
    • Linus Torvalds's avatar
      bluetooth: fix list handling · 9b284cbd
      Linus Torvalds authored
      Commit 835a6a2f ("Bluetooth: Stop sabotaging list poisoning")
      thought that the code was sabotaging the list poisoning when NULL'ing
      out the list pointers and removed it.
      
      But what was going on was that the bluetooth code was using NULL
      pointers for the list as a way to mark it empty, and that commit just
      broke it (and replaced the test with NULL with a "list_empty()" test on
      a uninitialized list instead, breaking things even further).
      
      So fix it all up to use the regular and real list_empty() handling
      (which does not use NULL, but a pointer to itself), also making sure to
      initialize the list properly (the previous NULL case was initialized
      implicitly by the session being allocated with kzalloc())
      
      This is a combination of patches by Marcel Holtmann and Tedd Ho-Jeong
      An.
      
      [ I would normally expect to get this through the bt tree, but I'm going
        to release -rc1, so I'm just committing this directly   - Linus ]
      Reported-and-tested-by: default avatarJörg Otte <jrg.otte@gmail.com>
      Cc: Alexey Dobriyan <adobriyan@gmail.com>
      Original-by: default avatarTedd Ho-Jeong An <tedd.an@intel.com>
      Original-by: Marcel Holtmann <marcel@holtmann.org>:
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      9b284cbd
  8. 04 Jul, 2015 25 commits