1. 15 Apr, 2016 1 commit
    • Suzuki K Poulose's avatar
      arm64: Add cpu_panic_kernel helper · 17eebd1a
      Suzuki K Poulose authored
      During the activation of a secondary CPU, we could report serious
      configuration issues and hence request to crash the kernel. We do
      this for CPU ASID bit check now. We will need it also for handling
      mismatched exception levels for the CPUs with VHE. Hence, add a
      helper to do the same for reusability.
      
      Cc: Mark Rutland <mark.rutland@arm.com>
      Cc: Will Deacon <will.deacon@arm.com>
      Cc: Catalin Marinas <catalin.marinas@arm.com>
      Cc: Marc Zyngier <marc.zyngier@arm.com>
      Signed-off-by: default avatarSuzuki K Poulose <suzuki.poulose@arm.com>
      Signed-off-by: default avatarWill Deacon <will.deacon@arm.com>
      17eebd1a
  2. 14 Apr, 2016 18 commits
    • James Morse's avatar
      arm64: mm: Add trace_irqflags annotations to do_debug_exception() · 6afedcd2
      James Morse authored
      With CONFIG_PROVE_LOCKING, CONFIG_DEBUG_LOCKDEP and CONFIG_TRACE_IRQFLAGS
      enabled, lockdep will compare current->hardirqs_enabled with the flags from
      local_irq_save().
      
      When a debug exception occurs, interrupts are disabled in entry.S, but
      lockdep isn't told, resulting in:
      DEBUG_LOCKS_WARN_ON(current->hardirqs_enabled)
      ------------[ cut here ]------------
      WARNING: at ../kernel/locking/lockdep.c:3523
      Modules linked in:
      CPU: 3 PID: 1752 Comm: perf Not tainted 4.5.0-rc4+ #2204
      Hardware name: ARM Juno development board (r1) (DT)
      task: ffffffc974868000 ti: ffffffc975f40000 task.ti: ffffffc975f40000
      PC is at check_flags.part.35+0x17c/0x184
      LR is at check_flags.part.35+0x17c/0x184
      pc : [<ffffff80080fc93c>] lr : [<ffffff80080fc93c>] pstate: 600003c5
      [...]
      ---[ end trace 74631f9305ef5020 ]---
      Call trace:
      [<ffffff80080fc93c>] check_flags.part.35+0x17c/0x184
      [<ffffff80080ffe30>] lock_acquire+0xa8/0xc4
      [<ffffff8008093038>] breakpoint_handler+0x118/0x288
      [<ffffff8008082434>] do_debug_exception+0x3c/0xa8
      [<ffffff80080854b4>] el1_dbg+0x18/0x6c
      [<ffffff80081e82f4>] do_filp_open+0x64/0xdc
      [<ffffff80081d6e60>] do_sys_open+0x140/0x204
      [<ffffff80081d6f58>] SyS_openat+0x10/0x18
      [<ffffff8008085d30>] el0_svc_naked+0x24/0x28
      possible reason: unannotated irqs-off.
      irq event stamp: 65857
      hardirqs last  enabled at (65857): [<ffffff80081fb1c0>] lookup_mnt+0xf4/0x1b4
      hardirqs last disabled at (65856): [<ffffff80081fb188>] lookup_mnt+0xbc/0x1b4
      softirqs last  enabled at (65790): [<ffffff80080bdca4>] __do_softirq+0x1f8/0x290
      softirqs last disabled at (65757): [<ffffff80080be038>] irq_exit+0x9c/0xd0
      
      This patch adds the annotations to do_debug_exception(), while trying not
      to call trace_hardirqs_off() if el1_dbg() interrupted a task that already
      had irqs disabled.
      Signed-off-by: default avatarJames Morse <james.morse@arm.com>
      Signed-off-by: default avatarWill Deacon <will.deacon@arm.com>
      6afedcd2
    • Anna-Maria Gleixner's avatar
      arm64: hw-breakpoint: Remove superfluous SMP function call · 4bc49274
      Anna-Maria Gleixner authored
      Since commit 1cf4f629 ("cpu/hotplug: Move online calls to
      hotplugged cpu") it is ensured that callbacks of CPU_ONLINE and
      CPU_DOWN_PREPARE are processed on the hotplugged CPU. Due to this SMP
      function calls are no longer required.
      
      Replace smp_call_function_single() with a direct call of
      hw_breakpoint_reset(). To keep the calling convention, interrupts are
      explicitly disabled around the call.
      
      Cc: Catalin Marinas <catalin.marinas@arm.com>
      Cc: Will Deacon <will.deacon@arm.com>
      Cc: linux-arm-kernel@lists.infradead.org
      Signed-off-by: default avatarAnna-Maria Gleixner <anna-maria@linutronix.de>
      Signed-off-by: default avatarWill Deacon <will.deacon@arm.com>
      4bc49274
    • Anna-Maria Gleixner's avatar
      arm64/debug: Remove superfluous SMP function call · 499c8150
      Anna-Maria Gleixner authored
      Since commit 1cf4f629 ("cpu/hotplug: Move online calls to
      hotplugged cpu") it is ensured that callbacks of CPU_ONLINE and
      CPU_DOWN_PREPARE are processed on the hotplugged CPU. Due to this SMP
      function calls are no longer required.
      
      Replace smp_call_function_single() with a direct call to
      clear_os_lock(). The function writes the OSLAR register to clear OS
      locking. This does not require to be called with interrupts disabled,
      therefore the smp_call_function_single() calling convention is not
      preserved.
      
      Cc: Catalin Marinas <catalin.marinas@arm.com>
      Cc: Will Deacon <will.deacon@arm.com>
      Cc: linux-arm-kernel@lists.infradead.org
      Signed-off-by: default avatarAnna-Maria Gleixner <anna-maria@linutronix.de>
      Signed-off-by: default avatarWill Deacon <will.deacon@arm.com>
      499c8150
    • Ard Biesheuvel's avatar
      arm64: simplify kernel segment mapping granularity · 97740051
      Ard Biesheuvel authored
      The mapping of the kernel consist of four segments, each of which is mapped
      with different permission attributes and/or lifetimes. To optimize the TLB
      and translation table footprint, we define various opaque constants in the
      linker script that resolve to different aligment values depending on the
      page size and whether CONFIG_DEBUG_ALIGN_RODATA is set.
      
      Considering that
      - a 4 KB granule kernel benefits from a 64 KB segment alignment (due to
        the fact that it allows the use of the contiguous bit),
      - the minimum alignment of the .data segment is THREAD_SIZE already, not
        PAGE_SIZE (i.e., we already have padding between _data and the start of
        the .data payload in many cases),
      - 2 MB is a suitable alignment value on all granule sizes, either for
        mapping directly (level 2 on 4 KB), or via the contiguous bit (level 3 on
        16 KB and 64 KB),
      - anything beyond 2 MB exceeds the minimum alignment mandated by the boot
        protocol, and can only be mapped efficiently if the physical alignment
        happens to be the same,
      
      we can simplify this by standardizing on 64 KB (or 2 MB) explicitly, i.e.,
      regardless of granule size, all segments are aligned either to 64 KB, or to
      2 MB if CONFIG_DEBUG_ALIGN_RODATA=y. This also means we can drop the Kconfig
      dependency of CONFIG_DEBUG_ALIGN_RODATA on CONFIG_ARM64_4K_PAGES.
      Signed-off-by: default avatarArd Biesheuvel <ard.biesheuvel@linaro.org>
      Signed-off-by: default avatarWill Deacon <will.deacon@arm.com>
      97740051
    • Ard Biesheuvel's avatar
      arm64: cover the .head.text section in the .text segment mapping · 7eb90f2f
      Ard Biesheuvel authored
      Keeping .head.text out of the .text mapping buys us very little: its actual
      payload is only 4 KB, most of which is padding, but the page alignment may
      add up to 2 MB (in case of CONFIG_DEBUG_ALIGN_RODATA=y) of additional
      padding to the uncompressed kernel Image.
      
      Also, on 4 KB granule kernels, the 4 KB misalignment of .text forces us to
      map the adjacent 56 KB of code without the PTE_CONT attribute, and since
      this region contains things like the vector table and the GIC interrupt
      handling entry point, this region is likely to benefit from the reduced TLB
      pressure that results from PTE_CONT mappings.
      
      So remove the alignment between the .head.text and .text sections, and use
      the [_text, _etext) rather than the [_stext, _etext) interval for mapping
      the .text segment.
      Signed-off-by: default avatarArd Biesheuvel <ard.biesheuvel@linaro.org>
      Signed-off-by: default avatarWill Deacon <will.deacon@arm.com>
      7eb90f2f
    • Ard Biesheuvel's avatar
      arm64: move early boot code to the .init segment · 546c8c44
      Ard Biesheuvel authored
      Apart from the arm64/linux and EFI header data structures, there is nothing
      in the .head.text section that must reside at the beginning of the Image.
      So let's move it to the .init section where it belongs.
      
      Note that this involves some minor tweaking of the EFI header, primarily
      because the address of 'stext' no longer coincides with the start of the
      .text section. It also requires a couple of relocated symbol references
      to be slightly rewritten or their definition moved to the linker script.
      Signed-off-by: default avatarArd Biesheuvel <ard.biesheuvel@linaro.org>
      Signed-off-by: default avatarWill Deacon <will.deacon@arm.com>
      546c8c44
    • Ard Biesheuvel's avatar
      arm64: use 'segment' rather than 'chunk' to describe mapped kernel regions · 2c09ec06
      Ard Biesheuvel authored
      Replace the poorly defined term chunk with segment, which is a term that is
      already used by the ELF spec to describe contiguous mappings with the same
      permission attributes of statically allocated ranges of an executable.
      Acked-by: default avatarMark Rutland <mark.rutland@arm.com>
      Signed-off-by: default avatarArd Biesheuvel <ard.biesheuvel@linaro.org>
      Signed-off-by: default avatarWill Deacon <will.deacon@arm.com>
      2c09ec06
    • Ard Biesheuvel's avatar
      arm64: mm: restrict virt_to_page() to the linear mapping · 9f287591
      Ard Biesheuvel authored
      Now that the vmemmap region has been redefined to cover the linear region
      rather than the entire physical address space, we no longer need to
      perform a virtual-to-physical translation in the implementaion of
      virt_to_page(). This restricts virt_to_page() translations to the linear
      region, so redefine virt_addr_valid() as well.
      Signed-off-by: default avatarArd Biesheuvel <ard.biesheuvel@linaro.org>
      Signed-off-by: default avatarWill Deacon <will.deacon@arm.com>
      9f287591
    • Ard Biesheuvel's avatar
      arm64: mm: move vmemmap region right below the linear region · 3e1907d5
      Ard Biesheuvel authored
      This moves the vmemmap region right below PAGE_OFFSET, aka the start
      of the linear region, and redefines its size to be a power of two.
      Due to the placement of PAGE_OFFSET in the middle of the address space,
      whose size is a power of two as well, this guarantees that virt to
      page conversions and vice versa can be implemented efficiently, by
      masking and shifting rather than ordinary arithmetic.
      Signed-off-by: default avatarArd Biesheuvel <ard.biesheuvel@linaro.org>
      Signed-off-by: default avatarWill Deacon <will.deacon@arm.com>
      3e1907d5
    • Ard Biesheuvel's avatar
      arm64: insn: avoid virt_to_page() translations on core kernel symbols · e44308e6
      Ard Biesheuvel authored
      Before restricting virt_to_page() to the linear mapping, ensure that
      the text patching code does not use it to resolve references into the
      core kernel text, which is mapped in the vmalloc area.
      Signed-off-by: default avatarArd Biesheuvel <ard.biesheuvel@linaro.org>
      Signed-off-by: default avatarWill Deacon <will.deacon@arm.com>
      e44308e6
    • Ard Biesheuvel's avatar
      arm64: mm: avoid virt_to_page() translation for the zero page · 22b6f3b0
      Ard Biesheuvel authored
      The zero page is statically allocated, so grab its struct page pointer
      without using virt_to_page(), which will be restricted to the linear
      mapping later.
      Signed-off-by: default avatarArd Biesheuvel <ard.biesheuvel@linaro.org>
      Signed-off-by: default avatarWill Deacon <will.deacon@arm.com>
      22b6f3b0
    • Ard Biesheuvel's avatar
      arm64: mm: free __init memory via the linear mapping · d386825c
      Ard Biesheuvel authored
      The implementation of free_initmem_default() expects __init_begin
      and __init_end to be covered by the linear mapping, which is no
      longer the case. So open code it instead, using addresses that are
      explicitly translated from kernel virtual to linear virtual.
      Signed-off-by: default avatarArd Biesheuvel <ard.biesheuvel@linaro.org>
      Signed-off-by: default avatarWill Deacon <will.deacon@arm.com>
      d386825c
    • Ard Biesheuvel's avatar
      arm64: vdso: avoid virt_to_page() translations on kernel symbols · 97bbb54e
      Ard Biesheuvel authored
      The translation performed by virt_to_page() is only valid for linear
      addresses, and kernel symbols are no longer in the linear mapping.
      So perform the __pa() translation explicitly, which does the right
      thing in either case, and only then translate to a struct page offset.
      Signed-off-by: default avatarArd Biesheuvel <ard.biesheuvel@linaro.org>
      Signed-off-by: default avatarWill Deacon <will.deacon@arm.com>
      97bbb54e
    • Ard Biesheuvel's avatar
      arm64: remove the now unneeded relocate_initrd() · 8923a166
      Ard Biesheuvel authored
      This removes the relocate_initrd() implementation and invocation, which are
      no longer needed now that the placement of the initrd is guaranteed to be
      covered by the linear mapping.
      Signed-off-by: default avatarArd Biesheuvel <ard.biesheuvel@linaro.org>
      Signed-off-by: default avatarWill Deacon <will.deacon@arm.com>
      8923a166
    • Ard Biesheuvel's avatar
      arm64: add the initrd region to the linear mapping explicitly · 177e15f0
      Ard Biesheuvel authored
      Instead of going out of our way to relocate the initrd if it turns out
      to occupy memory that is not covered by the linear mapping, just add the
      initrd to the linear mapping. This puts the burden on the bootloader to
      pass initrd= and mem= options that are mutually consistent.
      
      Note that, since the placement of the linear region in the PA space is
      also dependent on the placement of the kernel Image, which may reside
      anywhere in memory, we may still end up with a situation where the initrd
      and the kernel Image are simply too far apart to be covered by the linear
      region.
      
      Since we now leave it up to the bootloader to pass the initrd in memory
      that is guaranteed to be accessible by the kernel, add a mention of this to
      the arm64 boot protocol specification as well.
      Signed-off-by: default avatarArd Biesheuvel <ard.biesheuvel@linaro.org>
      Signed-off-by: default avatarWill Deacon <will.deacon@arm.com>
      177e15f0
    • Ard Biesheuvel's avatar
      Revert "arm64: account for sparsemem section alignment when choosing vmemmap offset" · 3bab79ed
      Ard Biesheuvel authored
      This reverts commit 36e5cd6b, since the
      section alignment is now guaranteed by construction when choosing the
      value of memstart_addr.
      Signed-off-by: default avatarArd Biesheuvel <ard.biesheuvel@linaro.org>
      Signed-off-by: default avatarWill Deacon <will.deacon@arm.com>
      3bab79ed
    • Ard Biesheuvel's avatar
      arm64: choose memstart_addr based on minimum sparsemem section alignment · 06e9bf2f
      Ard Biesheuvel authored
      This redefines ARM64_MEMSTART_ALIGN in terms of the minimal alignment
      required by sparsemem vmemmap. This comes down to using 1 GB for all
      translation granules if CONFIG_SPARSEMEM_VMEMMAP is enabled.
      Signed-off-by: default avatarArd Biesheuvel <ard.biesheuvel@linaro.org>
      Signed-off-by: default avatarWill Deacon <will.deacon@arm.com>
      06e9bf2f
    • Ard Biesheuvel's avatar
      arm64/mm: ensure memstart_addr remains sufficiently aligned · 2958987f
      Ard Biesheuvel authored
      After choosing memstart_addr to be the highest multiple of
      ARM64_MEMSTART_ALIGN less than or equal to the first usable physical memory
      address, we clip the memblocks to the maximum size of the linear region.
      Since the kernel may be high up in memory, we take care not to clip the
      kernel itself, which means we have to clip some memory from the bottom if
      this occurs, to ensure that the distance between the first and the last
      usable physical memory address can be covered by the linear region.
      
      However, we fail to update memstart_addr if this clipping from the bottom
      occurs, which means that we may still end up with virtual addresses that
      wrap into the userland range. So increment memstart_addr as appropriate to
      prevent this from happening.
      Signed-off-by: default avatarArd Biesheuvel <ard.biesheuvel@linaro.org>
      Signed-off-by: default avatarWill Deacon <will.deacon@arm.com>
      2958987f
  3. 13 Apr, 2016 2 commits
    • Jisheng Zhang's avatar
      arm64: cpuidle: make arm_cpuidle_suspend() a bit more efficient · b5fda7ed
      Jisheng Zhang authored
      Currently, we check two pointers: cpu_ops and cpu_suspend on every idle
      state entry. These pointers check can be avoided:
      
      If cpu_ops has not been registered, arm_cpuidle_init() will return
      -EOPNOTSUPP, so arm_cpuidle_suspend() will never have chance to
      run. In other word, the cpu_ops check can be avoid.
      
      Similarly, the cpu_suspend check could be avoided in this hot path by
      moving it into arm_cpuidle_init().
      
      I measured the 4096 * time from arm_cpuidle_suspend entry point to the
      cpu_psci_cpu_suspend entry point. HW platform is Marvell BG4CT STB
      board.
      
      1. only one shell, no other process, hot-unplug secondary cpus, execute
      the following cmd
      
      while true
      do
      	sleep 0.2
      done
      
      before the patch: 1581220ns
      
      after the patch: 1579630ns
      
      reduced by 0.1%
      
      2. only one shell, no other process, hot-unplug secondary cpus, execute
      the following cmd
      
      while true
      do
      	md5sum /tmp/testfile
      	sleep 0.2
      done
      
      NOTE: the testfile size should be larger than L1+L2 cache size
      
      before the patch: 1961960ns
      after the patch: 1912500ns
      
      reduced by 2.5%
      
      So the more complex the system load, the bigger the improvement.
      Signed-off-by: default avatarJisheng Zhang <jszhang@marvell.com>
      Acked-by: default avatarLorenzo Pieralisi <lorenzo.pieralisi@arm.com>
      Signed-off-by: default avatarWill Deacon <will.deacon@arm.com>
      b5fda7ed
    • Kefeng Wang's avatar
      arm64: cpufeature: append additional id_aa64mmfr2 fields to cpufeature · 7d7b4ae4
      Kefeng Wang authored
      There are some new cpu features which can be identified by id_aa64mmfr2,
      this patch appends all fields of it.
      Signed-off-by: default avatarKefeng Wang <wangkefeng.wang@huawei.com>
      Signed-off-by: default avatarWill Deacon <will.deacon@arm.com>
      7d7b4ae4
  4. 11 Apr, 2016 4 commits
  5. 10 Apr, 2016 1 commit
    • Linus Torvalds's avatar
      Revert "ext4: allow readdir()'s of large empty directories to be interrupted" · 9f2394c9
      Linus Torvalds authored
      This reverts commit 1028b55b.
      
      It's broken: it makes ext4 return an error at an invalid point, causing
      the readdir wrappers to write the the position of the last successful
      directory entry into the position field, which means that the next
      readdir will now return that last successful entry _again_.
      
      You can only return fatal errors (that terminate the readdir directory
      walk) from within the filesystem readdir functions, the "normal" errors
      (that happen when the readdir buffer fills up, for example) happen in
      the iterorator where we know the position of the actual failing entry.
      
      I do have a very different patch that does the "signal_pending()"
      handling inside the iterator function where it is allowable, but while
      that one passes all the sanity checks, I screwed up something like four
      times while emailing it out, so I'm not going to commit it today.
      
      So my track record is not good enough, and the stars will have to align
      better before that one gets committed.  And it would be good to get some
      review too, of course, since celestial alignments are always an iffy
      debugging model.
      
      IOW, let's just revert the commit that caused the problem for now.
      Reported-by: default avatarGreg Thelen <gthelen@google.com>
      Cc: Theodore Ts'o <tytso@mit.edu>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      9f2394c9
  6. 09 Apr, 2016 14 commits
    • Linus Torvalds's avatar
      Merge branch 'parisc-4.6-3' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux · 5b5b7fd1
      Linus Torvalds authored
      Pull parisc fixes from Helge Deller:
       "Since commit 0de79858 ("parisc: Use generic extable search and
        sort routines") module loading is boken on parisc, because the parisc
        module loader wasn't prepared for the new R_PARISC_PCREL32 relocations.
      
        In addition, due to that breakage, Mikulas Patocka noticed that
        handling exceptions from modules probably never worked on parisc.  It
        was just masked by the fact that exceptions from modules don't happen
        during normal use.
      
        This patch series fixes those issues and survives the tests of the
        lib/test_user_copy kernel module test.  Some patches are tagged for
        stable"
      
      * 'parisc-4.6-3' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
        parisc: Update comment regarding relative extable support
        parisc: Unbreak handling exceptions from kernel modules
        parisc: Fix kernel crash with reversed copy_from_user()
        parisc: Avoid function pointers for kernel exception routines
        parisc: Handle R_PARISC_PCREL32 relocations in kernel modules
      5b5b7fd1
    • Linus Torvalds's avatar
      Merge branch 'libnvdimm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm · 239467e8
      Linus Torvalds authored
      Pull libnvdimm fixes from Dan Williams:
       "Three fixes, the first two are tagged for -stable:
      
         - The ndctl utility/library gained expanded unit tests illuminating a
           long standing bug in the libnvdimm SMART data retrieval
           implementation.
      
           It has been broken since its initial implementation, now fixed.
      
         - Another one line fix for the detection of stale info blocks.
      
           Without this change userspace can get into a situation where it is
           unable to reconfigure a namespace.
      
         - Fix the badblock initialization path in the presence of the new (in
           v4.6-rc1) section alignment workarounds.
      
           Without this change badblocks will be reported at the wrong offset.
      
        These have received a build success report from the kbuild robot and
        have appeared in -next with no reported issues"
      
      * 'libnvdimm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm:
        libnvdimm, pfn: fix nvdimm_namespace_add_poison() vs section alignment
        libnvdimm, pfn: fix uuid validation
        libnvdimm: fix smart data retrieval
      239467e8
    • Linus Torvalds's avatar
      Merge tag 'gpio-v4.6-3' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio · 289b7bfd
      Linus Torvalds authored
      Pull GPIO fixes from Linus Walleij:
       "Here is a set of four GPIO fixes.  The two fixes to the core are
        serious as they are regressing minor architectures.
      
        Core fixes:
      
         - Defer GPIO device setup until after gpiolib is initialized.
      
           It turns out that a few very tightly integrated GPIO platform
           drivers initialize so early (befor core_initcall()) so that the
           gpiolib isn't even initialized itself.  That limits what the
           library can do, and we cannot reference uninitialized fields until
           later.
      
           Defer some of the initialization until right after the gpiolib is
           initialized in these (rare) cases.
      
         - As a consequence: do not use devm_* resources when allocating the
           states in the initial set-up of the gpiochip.
      
        Driver fixes:
      
         - In ACPI retrieveal: ignore GpioInt when looking for output GPIOs.
      
         - Fix legacy builds on the PXA without a backing pin controller.
      
         - Use correct datatype on pca953x register writes"
      
      * tag 'gpio-v4.6-3' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio:
        gpio: pca953x: Use correct u16 value for register word write
        gpiolib: Defer gpio device setup until after gpiolib initialization
        gpiolib: Do not use devm functions when registering gpio chip
        gpio: pxa: fix legacy non pinctrl aware builds
        gpio / ACPI: ignore GpioInt() GPIOs when requesting GPIO_OUT_*
      289b7bfd
    • Linus Torvalds's avatar
      Merge tag 'tty-4.6-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty · 183c948a
      Linus Torvalds authored
      Pull tty fixes from Greg KH:
       "Here are two tty fixes for issues found.
      
        One was due to a merge error in 4.6-rc1, and the other a regression
        fix for UML consoles that broke in 4.6-rc1.
      
        Both have been in linux-next for a while"
      
      * tag 'tty-4.6-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
        tty: Fix merge of "tty: Refactor tty_open()"
        tty: Fix UML console breakage
      183c948a
    • Linus Torvalds's avatar
      Merge tag 'usb-4.6-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb · ffb927d1
      Linus Torvalds authored
      Pull USB fixes from Greg KH:
       "Here are some USB fixes and new device ids for 4.6-rc3.
      
        Nothing major, the normal USB gadget fixes and usb-serial driver ids,
        along with some other fixes mixed in.  All except the USB serial ids
        have been tested in linux-next, the id additions should be fine as
        they are 'trivial'"
      
      * tag 'usb-4.6-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (25 commits)
        USB: option: add "D-Link DWM-221 B1" device id
        USB: serial: cp210x: Adding GE Healthcare Device ID
        USB: serial: ftdi_sio: Add support for ICP DAS I-756xU devices
        usb: dwc3: keystone: drop dma_mask configuration
        usb: gadget: udc-core: remove manual dma configuration
        usb: dwc3: pci: add ID for one more Intel Broxton platform
        usb: renesas_usbhs: fix to avoid using a disabled ep in usbhsg_queue_done()
        usb: dwc2: do not override forced dr_mode in gadget setup
        usb: gadget: f_midi: unlock on error
        USB: digi_acceleport: do sanity checking for the number of ports
        USB: cypress_m8: add endpoint sanity check
        USB: mct_u232: add sanity checking in probe
        usb: fix regression in SuperSpeed endpoint descriptor parsing
        USB: usbip: fix potential out-of-bounds write
        usb: renesas_usbhs: disable TX IRQ before starting TX DMAC transfer
        usb: renesas_usbhs: avoid NULL pointer derefernce in usbhsf_pkt_handler()
        usb: gadget: f_midi: Fixed a bug when buflen was smaller than wMaxPacketSize
        usb: phy: qcom-8x16: fix regulator API abuse
        usb: ch9: Fix SSP Device Cap wFunctionalitySupport type
        usb: gadget: composite: Access SSP Dev Cap fields properly
        ...
      ffb927d1
    • Linus Torvalds's avatar
      Merge tag 'staging-4.6-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging · c6e6e58c
      Linus Torvalds authored
      Pull staging and IIO driver fixes from Greg KH:
       "Here are some IIO driver fixes, along with two staging driver fixes
        for 4.6-rc3.
      
        One staging driver patch reverts the deletion of a driver that
        happened in 4.6-rc1.  We thought that laptop.org was dead, but it's
        still alive and kicking, and has users that were mad we broke their
        hardware by deleting a driver for their machines.  So that driver is
        added back and everyone is happy again.
      
        All of these have been in linux-next for a while with no reported
        issues"
      
      * tag 'staging-4.6-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging:
        Revert "Staging: olpc_dcon: Remove obsolete driver"
        staging/rdma/hfi1: select CRC32
        iio: gyro: bmg160: fix buffer read values
        iio: gyro: bmg160: fix endianness when reading axes
        iio: accel: bmc150: fix endianness when reading axes
        iio: st_magn: always define ST_MAGN_TRIGGER_SET_STATE
        iio: fix config watermark initial value
        iio: health: max30100: correct FIFO check condition
        iio: imu: Fix inv_mpu6050 dependencies
        iio: adc: Fix build error of missing devm_ioremap_resource on UM
        iio: light: apds9960: correct FIFO check condition
        iio: adc: max1363: correct reference voltage
        iio: adc: max1363: add missing adc to max1363_id
      c6e6e58c
    • Linus Torvalds's avatar
      Merge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi · fb41b4be
      Linus Torvalds authored
      Pull SCSI fixes from James Bottomley:
       "This is a set of eight fixes.
      
        Two are trivial gcc-6 updates (brace additions and unused variable
        removal).  There's a couple of cxlflash regressions, a correction for
        sd being overly chatty on revalidation (causing excess log increases).
        A VPD issue which could crash USB devices because they seem very
        intolerant to VPD inquiries, an ALUA deadlock fix and a mpt3sas buffer
        overrun fix"
      
      * tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
        scsi: Do not attach VPD to devices that don't support it
        sd: Fix excessive capacity printing on devices with blocks bigger than 512 bytes
        scsi_dh_alua: Fix a recently introduced deadlock
        scsi: Declare local symbols static
        cxlflash: Move to exponential back-off when cmd_room is not available
        cxlflash: Fix regression issue with re-ordering patch
        mpt3sas: Don't overreach ioc->reply_post[] during initialization
        aacraid: add missing curly braces
      fb41b4be
    • Linus Torvalds's avatar
      Merge tag 'md/4.6-rc2-fix' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md · 63b106a8
      Linus Torvalds authored
      Pull MD fixes from Shaohua Li:
       "This update mainly fixes bugs:
      
         - fix error handling (Guoqing)
         - fix a crash when a disk is hotremoved (me)
         - fix a dead loop (Wei Fang)"
      
      * tag 'md/4.6-rc2-fix' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md:
        md/bitmap: clear bitmap if bitmap_create failed
        MD: add rdev reference for super write
        md: fix a trivial typo in comments
        md:raid1: fix a dead loop when read from a WriteMostly disk
      63b106a8
    • Linus Torvalds's avatar
      Merge tag 'pm+acpi-4.6-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm · 40bca9db
      Linus Torvalds authored
      Pull power management and ACPI fixes from Rafael Wysocki:
       "Fixes for some issues discovered after recent changes and for some
        that have just been found lately regardless of those changes
        (intel_pstate, intel_idle, PM core, mailbox/pcc, turbostat) plus
        support for some new CPU models (intel_idle, Intel RAPL driver,
        turbostat) and documentation updates (intel_pstate, PM core).
      
        Specifics:
      
         - intel_pstate fixes for two issues exposed by the recent switch over
           from using timers and for one issue introduced during the 4.4 cycle
           plus new comments describing data structures used by the driver
           (Rafael Wysocki, Srinivas Pandruvada).
      
         - intel_idle fixes related to CPU offline/online (Richard Cochran).
      
         - intel_idle support (new CPU IDs and state definitions mostly) for
           Skylake-X and Kabylake processors (Len Brown).
      
         - PCC mailbox driver fix for an out-of-bounds memory access that may
           cause the kernel to panic() (Shanker Donthineni).
      
         - New (missing) CPU ID for one apparently overlooked Haswell model in
           the Intel RAPL power capping driver (Srinivas Pandruvada).
      
         - Fix for the PM core's wakeup IRQs framework to make it work after
           wakeup settings reconfiguration from sysfs (Grygorii Strashko).
      
         - Runtime PM documentation update to make it describe what needs to
           be done during device removal more precisely (Krzysztof Kozlowski).
      
         - Stale comment removal cleanup in the cpufreq-dt driver (Viresh
           Kumar).
      
         - turbostat utility fixes and support for Broxton, Skylake-X and
           Kabylake processors (Len Brown)"
      
      * tag 'pm+acpi-4.6-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (28 commits)
        PM / wakeirq: fix wakeirq setting after wakup re-configuration from sysfs
        tools/power turbostat: work around RC6 counter wrap
        tools/power turbostat: initial KBL support
        tools/power turbostat: initial SKX support
        tools/power turbostat: decode BXT TSC frequency via CPUID
        tools/power turbostat: initial BXT support
        tools/power turbostat: print IRTL MSRs
        tools/power turbostat: SGX state should print only if --debug
        intel_idle: Add KBL support
        intel_idle: Add SKX support
        intel_idle: Clean up all registered devices on exit.
        intel_idle: Propagate hot plug errors.
        intel_idle: Don't overreact to a cpuidle registration failure.
        intel_idle: Setup the timer broadcast only on successful driver load.
        intel_idle: Avoid a double free of the per-CPU data.
        intel_idle: Fix dangling registration on error path.
        intel_idle: Fix deallocation order on the driver exit path.
        intel_idle: Remove redundant initialization calls.
        intel_idle: Fix a helper function's return value.
        intel_idle: remove useless return from void function.
        ...
      40bca9db
    • Linus Torvalds's avatar
      Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net · 9ef11ceb
      Linus Torvalds authored
      Pull networking fixes from David Miller:
      
       1) Stale SKB data pointer access across pskb_may_pull() calls in L2TP,
          from Haishuang Yan.
      
       2) Fix multicast frame handling in mac80211 AP code, from Felix
          Fietkau.
      
       3) mac80211 station hashtable insert errors not handled properly, fix
          from Johannes Berg.
      
       4) Fix TX descriptor count limit handling in e1000, from Alexander
          Duyck.
      
       5) Revert a buggy netdev refcount fix in netpoll, from Bjorn Helgaas.
      
       6) Must assign rtnl_link_ops of the device before registering it, fix
          in ip6_tunnel from Thadeu Lima de Souza Cascardo.
      
       7) Memory leak fix in tc action net exit, from WANG Cong.
      
       8) Add missing AF_KCM entries to name tables, from Dexuan Cui.
      
       9) Fix regression in GRE handling of csums wrt.  FOU, from Alexander
          Duyck.
      
      10) Fix memory allocation alignment and congestion map corruption in
          RDS, from Shamir Rabinovitch.
      
      11) Fix default qdisc regression in tuntap driver, from Jason Wang.
      
      * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (44 commits)
        bridge, netem: mark mailing lists as moderated
        tuntap: restore default qdisc
        mpls: find_outdev: check for err ptr in addition to NULL check
        ipv6: Count in extension headers in skb->network_header
        RDS: fix congestion map corruption for PAGE_SIZE > 4k
        RDS: memory allocated must be align to 8
        GRE: Disable segmentation offloads w/ CSUM and we are encapsulated via FOU
        net: add the AF_KCM entries to family name tables
        MAINTAINERS: intel-wired-lan list is moderated
        lib/test_bpf: Add additional BPF_ADD tests
        lib/test_bpf: Add test to check for result of 32-bit add that overflows
        lib/test_bpf: Add tests for unsigned BPF_JGT
        lib/test_bpf: Fix JMP_JSET tests
        VSOCK: Detach QP check should filter out non matching QPs.
        stmmac: fix adjust link call in case of a switch is attached
        af_packet: tone down the Tx-ring unsupported spew.
        net_sched: fix a memory leak in tc action
        samples/bpf: Enable powerpc support
        samples/bpf: Use llc in PATH, rather than a hardcoded value
        samples/bpf: Fix build breakage with map_perf_test_user.c
        ...
      9ef11ceb
    • Linus Torvalds's avatar
      Merge branch 'for-linus-4.6' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs · 839a3f76
      Linus Torvalds authored
      Pull btrfs fixes from Chris Mason:
       "These are bug fixes, including a really old fsync bug, and a few trace
        points to help us track down problems in the quota code"
      
      * 'for-linus-4.6' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs:
        Btrfs: fix file/data loss caused by fsync after rename and new inode
        btrfs: Reset IO error counters before start of device replacing
        btrfs: Add qgroup tracing
        Btrfs: don't use src fd for printk
        btrfs: fallback to vmalloc in btrfs_compare_tree
        btrfs: handle non-fatal errors in btrfs_qgroup_inherit()
        btrfs: Output more info for enospc_debug mount option
        Btrfs: fix invalid reference in replace_path
        Btrfs: Improve FL_KEEP_SIZE handling in fallocate
      839a3f76
    • Linus Torvalds's avatar
      Merge tag 'for-linus-4.6-ofs1' of git://git.kernel.org/pub/scm/linux/kernel/git/hubcap/linux · 67592126
      Linus Torvalds authored
      Pull orangefs fixes from Mike Marshall:
       "Orangefs cleanups and a strncpy vulnerability fix.
      
        Cleanups:
         - remove an unused variable from orangefs_readdir.
         - clean up printk wrapper used for ofs "gossip" debugging.
         - clean up truncate ctime and mtime setting in inode.c
         - remove a useless null check found by coccinelle.
         - optimize some memcpy/memset boilerplate code.
         - remove some useless sanity checks from xattr.c
      
        Fix:
         - fix a potential strncpy vulnerability"
      
      * tag 'for-linus-4.6-ofs1' of git://git.kernel.org/pub/scm/linux/kernel/git/hubcap/linux:
        orangefs: remove unused variable
        orangefs: Add KERN_<LEVEL> to gossip_<level> macros
        orangefs: strncpy -> strscpy
        orangefs: clean up truncate ctime and mtime setting
        Orangefs: fix ifnullfree.cocci warnings
        Orangefs: optimize boilerplate code.
        Orangefs: xattr.c cleanup
      67592126
    • Linus Torvalds's avatar
      Merge tag 'iommu-fixes-v4.6-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu · 1a59c539
      Linus Torvalds authored
      Pull IOMMU fixes from Joerg Roedel:
      
       - compile-time fixes (warnings and failures)
      
       - a bug in iommu core code which could cause the group->domain pointer
         to be falsly cleared
      
       - fix in scatterlist handling of the ARM common DMA-API code
      
       - stall detection fix for the Rockchip IOMMU driver
      
      * tag 'iommu-fixes-v4.6-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu:
        iommu/vt-d: Silence an uninitialized variable warning
        iommu/rockchip: Fix "is stall active" check
        iommu: Don't overwrite domain pointer when there is no default_domain
        iommu/dma: Restore scatterlist offsets correctly
        iommu: provide of_xlate pointer unconditionally
      1a59c539
    • Wolfram Sang's avatar
      i2c: jz4780: really prevent potential division by zero · caf28080
      Wolfram Sang authored
      Make sure we avoid a division-by-zero OOPS in case clock-frequency is
      set too low in DT. Add missing '\n' while we are here.
      Signed-off-by: default avatarWolfram Sang <wsa@the-dreams.de>
      Acked-by: default avatarAxel Lin <axel.lin@ingics.com>
      caf28080