1. 19 Sep, 2016 4 commits
    • Michael Ellerman's avatar
      powerpc: Ensure .mem(init|exit).text are within _stext/_etext · 7de3b27b
      Michael Ellerman authored
      In our linker script we open code the list of text sections, because we
      need to include the __ftr_alt sections, which are arch-specific.
      
      This means we can't use TEXT_TEXT as defined in vmlinux.lds.h, and so we
      don't have the MEM_KEEP() logic for memory hotplug sections.
      
      If we build the kernel with the gold linker, and with CONFIG_MEMORY_HOTPLUG=y,
      we see that functions marked __meminit can end up outside of the
      _stext/_etext range, and also outside of _sinittext/_einittext, eg:
      
          c000000000000000 T _stext
          c0000000009e0000 A _etext
          c0000000009e3f18 T hash__vmemmap_create_mapping
          c000000000ca0000 T _sinittext
          c000000000d00844 T _einittext
      
      This causes them to not be recognised as text by is_kernel_text(), and
      prevents them being patched by jump_label (and presumably ftrace/kprobes
      etc.).
      
      Fix it by adding MEM_KEEP() directives, mirroring what TEXT_TEXT does.
      
      This isn't a problem when CONFIG_MEMORY_HOTPLUG=n, because we use the
      standard INIT_TEXT_SECTION() and EXIT_TEXT macros from vmlinux.lds.h.
      Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
      Tested-by: default avatarAnton Blanchard <anton@samba.org>
      Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
      7de3b27b
    • Michael Ellerman's avatar
      powerpc: Don't change the section in _GLOBAL() · bea2dccc
      Michael Ellerman authored
      Currently the _GLOBAL() macro unilaterally sets the assembler section to
      ".text" at the start of the macro. This is rude as the caller may be
      using a different section.
      
      So let the caller decide which section to emit the code into. On big
      endian we do need to switch to the ".opd" section to emit the OPD, but
      do that with pushsection/popsection, thereby leaving the original
      section intact.
      
      I verified that the order of all entries in System.map is unchanged
      after this patch. The actual addresses shift around slightly so you
      can't just diff the System.map.
      Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
      Reviewed-by: default avatarNicholas Piggin <npiggin@gmail.com>
      Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
      bea2dccc
    • Nicholas Piggin's avatar
      powerpc/kernel: Use kprobe blacklist for asm functions · 6f698df1
      Nicholas Piggin authored
      Rather than forcing the whole function into the ".kprobes.text" section,
      just add the symbol's address to the kprobe blacklist.
      
      This also lets us drop the three versions of the_KPROBE macro, in
      exchange for just one version of _ASM_NOKPROBE_SYMBOL - which is a good
      cleanup.
      Signed-off-by: default avatarNicholas Piggin <npiggin@gmail.com>
      Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
      6f698df1
    • Nicholas Piggin's avatar
      powerpc: Use kprobe blacklist for exception handlers · 03465f89
      Nicholas Piggin authored
      Currently we mark the C implementations of some exception handlers as
      __kprobes. This has the effect of putting them in the ".kprobes.text"
      section, which separates them from the rest of the text.
      
      Instead we can use the blacklist macros to add the symbols to a
      blacklist which kprobes will check. This allows the linker to move
      exception handler functions close to callers and avoids trampolines in
      larger kernels.
      Signed-off-by: default avatarNicholas Piggin <npiggin@gmail.com>
      [mpe: Reword change log a bit]
      Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
      03465f89
  2. 13 Sep, 2016 25 commits
  3. 10 Sep, 2016 1 commit
  4. 04 Sep, 2016 4 commits
  5. 03 Sep, 2016 6 commits
    • Linus Torvalds's avatar
      Merge branch 'for-linus-4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs · 4b30b6d1
      Linus Torvalds authored
      Pull btrfs fixes from Chris Mason:
       "I'm still prepping a set of fixes for btrfs fsync, just nailing down a
        hard to trigger memory corruption.  For now, these are tested and ready."
      
      * 'for-linus-4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs:
        btrfs: fix one bug that process may endlessly wait for ticket in wait_reserve_ticket()
        Btrfs: fix endless loop in balancing block groups
        Btrfs: kill invalid ASSERT() in process_all_refs()
      4b30b6d1
    • Linus Torvalds's avatar
      Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux · 2bece1a0
      Linus Torvalds authored
      Pull arm64 fixes from Catalin Marinas:
       "arm64 and arm/perf fixes:
      
         - arm64 fix: debug exception unmasking on the CPU resume path
      
         - ARM PMU fixes: memory leak on error path and NULL pointer
           dereference"
      
      * tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
        arm64: kernel: Fix unmasked debug exceptions when restoring mdscr_el1
        drivers/perf: arm_pmu: Fix NULL pointer dereference during probe
        drivers/perf: arm_pmu: Fix leak in error path
      2bece1a0
    • Linus Torvalds's avatar
      Merge tag 'char-misc-4.8-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc · 593ee4ed
      Linus Torvalds authored
      Pull char/misc driver fixes from Greg KH:
       "Here are a number of small driver fixes for 4.8-rc5.
      
        The largest thing here is deleting an obsolete driver,
        drivers/misc/bh1780gli.c, as the functionality of it was replaced by
        an iio driver a while ago.
      
        The other fixes are things that have been reported, or reverts of
        broken stuff (the binder change).  All of these changes have been in
        linux-next for a while with no reported issues"
      
      * tag 'char-misc-4.8-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc:
        thunderbolt: Don't declare Falcon Ridge unsupported
        thunderbolt: Add support for INTEL_FALCON_RIDGE_2C controller.
        thunderbolt: Fix resume quirk for Falcon Ridge 4C.
        lkdtm: Mark lkdtm_rodata_do_nothing() notrace
        mei: me: disable driver on SPT SPS firmware
        Revert "android: binder: fix dangling pointer comparison"
        drivers/iio/light/Kconfig: SENSORS_BH1780 cleanup
        android: binder: fix dangling pointer comparison
        misc: delete bh1780 driver
      593ee4ed
    • Linus Torvalds's avatar
      Merge tag 'driver-core-4.8-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core · 41488202
      Linus Torvalds authored
      Pull driver core fixes from Greg KH:
       "Here are three small fixes for 4.8-rc5.
      
        One for sysfs, one for kernfs, and one documentation fix, all for
        reported issues.  All of these have been in linux-next for a while"
      
      * tag 'driver-core-4.8-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core:
        sysfs: correctly handle read offset on PREALLOC attrs
        documentation: drivers/core/of: fix name of of_node symlink
        kernfs: don't depend on d_find_any_alias() when generating notifications
      41488202
    • Linus Torvalds's avatar
      Merge tag 'staging-4.8-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging · 018c81b8
      Linus Torvalds authored
      Pull staging/IIO driver fixes from Greg KH:
       "Here are a number of small fixes for staging and IIO drivers that
        resolve reported problems.
      
        Full details are in the shortlog.  All of these have been in
        linux-next with no reported issues"
      
      * tag 'staging-4.8-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging: (35 commits)
        arm: dts: rockchip: add reset node for the exist saradc SoCs
        arm64: dts: rockchip: add reset saradc node for rk3368 SoCs
        iio: adc: rockchip_saradc: reset saradc controller before programming it
        iio: accel: kxsd9: Fix raw read return
        iio: adc: ti_am335x_adc: Increase timeout value waiting for ADC sample
        iio: adc: ti_am335x_adc: Protect FIFO1 from concurrent access
        include/linux: fix excess fence.h kernel-doc notation
        staging: wilc1000: correctly check if associatedsta has not been found
        staging: wilc1000: NULL dereference on error
        staging: wilc1000: txq_event: Fix coding error
        MAINTAINERS: Add file patterns for ion device tree bindings
        MAINTAINERS: Update maintainer entry for wilc1000
        iio: chemical: atlas-ph-sensor: fix typo in val assignment
        iio: fix sched WARNING "do not call blocking ops when !TASK_RUNNING"
        staging: comedi: ni_mio_common: fix AO inttrig backwards compatibility
        staging: comedi: dt2811: fix a precedence bug
        staging: comedi: adv_pci1760: Do not return EINVAL for CMDF_ROUND_DOWN.
        staging: comedi: ni_mio_common: fix wrong insn_write handler
        staging: comedi: comedi_test: fix timer race conditions
        staging: comedi: daqboard2000: bug fix board type matching code
        ...
      018c81b8
    • Linus Torvalds's avatar
      Merge tag 'tty-4.8-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty · 39da979c
      Linus Torvalds authored
      Pull serial driver fixes from Greg KH:
       "Here are some small serial driver fixes for 4.8-rc5.  One fixes an
        oft-reported build issue with the fintek driver, another reverts a
        patch that was causing problems, one fixes a crash, and some new
        device ids were added.
      
        All of these have been in linux-next for a while"
      
      * tag 'tty-4.8-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
        serial: 8250: added acces i/o products quad and octal serial cards
        serial: 8250_mid: fix divide error bug if baud rate is 0
        Revert "tty/serial/8250: use mctrl_gpio helpers"
        8250/fintek: rename IRQ_MODE macro
      39da979c