This set of changes introduces an atomic API to the PWM subsystem. This
is influenced by the DRM atomic API that was introduced a while back,
though it is obviously a lot simpler. The fundamental idea remains the
same, though: drivers provide a single callback to implement the atomic
configuration of a PWM channel.
As a side-effect the PWM subsystem gains the ability for initial state
retrieval, so that the logical state mirrors that of the hardware. Many
use-cases don't care about this, but for others it is essential.
These new features require changes in all users, which these patches
take care of. The core is transitioned to use the atomic callback if
available and provides a fallback mechanism for other drivers.
Changes to transition users and drivers to the atomic API are postponed
to v4.8.
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Merge tag 'pwm/for-4.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm
Pull pwm updates from Thierry Reding:
"This set of changes introduces an atomic API to the PWM subsystem.
This is influenced by the DRM atomic API that was introduced a while
back, though it is obviously a lot simpler. The fundamental idea
remains the same, though: drivers provide a single callback to
implement the atomic configuration of a PWM channel.
As a side-effect the PWM subsystem gains the ability for initial state
retrieval, so that the logical state mirrors that of the hardware.
Many use-cases don't care about this, but for others it is essential.
These new features require changes in all users, which these patches
take care of. The core is transitioned to use the atomic callback if
available and provides a fallback mechanism for other drivers.
Changes to transition users and drivers to the atomic API are
postponed to v4.8"
* tag 'pwm/for-4.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm: (30 commits)
pwm: Add information about polarity, duty cycle and period to debugfs
pwm: Switch to the atomic API
pwm: Update documentation
pwm: Add core infrastructure to allow atomic updates
pwm: Add hardware readout infrastructure
pwm: Move the enabled/disabled info into pwm_state
pwm: Introduce the pwm_state concept
pwm: Keep PWM state in sync with hardware state
ARM: Explicitly apply PWM config extracted from pwm_args
drm: i915: Explicitly apply PWM config extracted from pwm_args
input: misc: pwm-beeper: Explicitly apply PWM config extracted from pwm_args
input: misc: max8997: Explicitly apply PWM config extracted from pwm_args
backlight: lm3630a: explicitly apply PWM config extracted from pwm_args
backlight: lp855x: Explicitly apply PWM config extracted from pwm_args
backlight: lp8788: Explicitly apply PWM config extracted from pwm_args
backlight: pwm_bl: Use pwm_get_args() where appropriate
fbdev: ssd1307fb: Use pwm_get_args() where appropriate
regulator: pwm: Use pwm_get_args() where appropriate
leds: pwm: Use pwm_get_args() where appropriate
input: misc: max77693: Use pwm_get_args() where appropriate
...
Pull watchdog updates from Wim Van Sebroeck:
- add support for Fintek F81865 Super-IO chip
- add support for watchdogs (RWDT and SWDT) found on RCar Gen3 based
SoCs from Renesas
- octeon: Handle the FROZEN hot plug notifier actions
- f71808e_wdt fixes and cleanups
- some small improvements in code and documentation
* git://www.linux-watchdog.org/linux-watchdog:
MAINTAINERS: Add file patterns for watchdog device tree bindings
Documentation: Add ebc-c384_wdt watchdog-parameters.txt entry
watchdog: shwdt: Use setup_timer()
watchdog: cpwd: Use setup_timer()
arm64: defconfig: enable Renesas Watchdog Timer
watchdog: renesas-wdt: add driver
watchdog: remove error message when unable to allocate watchdog device
watchdog: f71808e_wdt: Fix WDTMOUT_STS register read
watchdog: f71808e_wdt: Fix typo
watchdog: f71808e_wdt: Add F81865 support
watchdog: sp5100_tco: properly check for new register layouts
watchdog: core: Fix circular locking dependency
watchdog: core: fix trivial typo in a comment
watchdog: hpwdt: Adjust documentation to match latest kernel module parameters.
watchdog: imx2_wdt: add external reset support via dt prop
watchdog: octeon: Handle the FROZEN hot plug notifier actions.
watchdog: qcom: Report reboot reason
Pull parisc updates from Helge Deller:
- Add native high-resolution timing code for sched_clock() and other
timing functions based on the processor internal cr16 cycle counters
- Add syscall tracepoint support
- Add regset support
- Speed up get_user() and put_user() functions
- Updated futex.h to match generic implementation (John David Anglin)
- A few smaller ftrace build fixes
- Fixed thuge-gen kernel self test to utilize architectured MAP_HUGETLB
value
- Added parisc architecture to seccomp_bpf kernel self test
- Various typo fixes (Andrea Gelmini)
* 'parisc-4.7-1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
parisc: Whitespace cleanups in unistd.h
parisc: Use long jump to reach ftrace_return_to_handler()
parisc: Fix typo in fpudispatch.c
parisc: Fix typos in eisa_eeprom.h
parisc: Fix typo in ldcw.h
parisc: Fix typo in pdc.h
parisc: Update futex.h to match generic implementation
parisc: Merge ftrace C-helper and assembler functions into .text.hot section
selftests/thuge-gen: Use platform specific MAP_HUGETLB value
parisc: Add native high-resolution sched_clock() implementation
parisc: Add ARCH_TRACEHOOK and regset support
parisc: Add 64bit get_user() and put_user() for 32bit kernel
parisc: Simplify and speed up get_user() and put_user()
parisc: Add syscall tracepoint support
This is a first set of bug fixes on top of what was merged for 4.7.
Two patches for lpc32xx address a harmless build warning that was
just introduced, one patch for the mediatek soc driver fixes a warning
for arm64, and the pxa changes are minor cleanups that should have
been part of the original pull requests but that I forgot to apply
to the cleanup-fixes branch earlier.
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Merge tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC fixes from Arnd Bergmann:
"This is a first set of bug fixes on top of what was merged for 4.7.
Two patches for lpc32xx address a harmless build warning that was just
introduced, one patch for the mediatek soc driver fixes a warning for
arm64, and the pxa changes are minor cleanups that should have been
part of the original pull requests but that I forgot to apply to the
cleanup-fixes branch earlier"
* tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc:
ARM: lpc32xx: fix NR_IRQS confict
ARM: lpc32xx: remove legacy irq controller driver
soc: mtk-pmic-wrap: avoid integer overflow warning
ARM: pxa: Remove CLK_IS_ROOT
ARM: pxa: activate pinctrl for device-tree machines
This is a collection of a few late fixes and other misc. stuff that
had dependencies on things being merged from other trees.
The Renesas R-Car power domain handling, and the Nvidia Tegra USB
support both hand notable changes that required changing the DT binding
in a way that only provides compatibility with old DT blobs on new
kernels but not vice versa. As a consequence, the DT changes
are based on top of the driver changes and are now in this branch.
For NXP i.MX and Samsung Exynos, the changes in here depend on
other changes that got merged through the clk maintainer tree.
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Merge tag 'armsoc-late' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC late DT updates from Arnd Bergmann:
"This is a collection of a few late fixes and other misc stuff that had
dependencies on things being merged from other trees.
The Renesas R-Car power domain handling, and the Nvidia Tegra USB
support both hand notable changes that required changing the DT
binding in a way that only provides compatibility with old DT blobs on
new kernels but not vice versa. As a consequence, the DT changes are
based on top of the driver changes and are now in this branch.
For NXP i.MX and Samsung Exynos, the changes in here depend on other
changes that got merged through the clk maintainer tree"
* tag 'armsoc-late' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (35 commits)
ARM: dts: exynos: Add support of Bus frequency using VDD_INT for exynos5422-odroidxu3
ARM: dts: exynos: Add bus nodes using VDD_INT for Exynos542x SoC
ARM: dts: exynos: Add NoC Probe dt node for Exynos542x SoC
ARM: dts: exynos: Add support of bus frequency for exynos4412-trats/odroidu3
ARM: dts: exynos: Expand the voltage range of buck1/3 regulator for exynos4412-odroidu3
ARM: dts: exynos: Add support of bus frequency using VDD_INT for exynos3250-rinato
ARM: dts: exynos: Add exynos4412-ppmu-common dtsi to delete duplicate PPMU nodes
ARM: dts: exynos: Add bus nodes using VDD_MIF for Exynos4210
ARM: dts: exynos: Add bus nodes using VDD_INT for Exynos4x12
ARM: dts: exynos: Add bus nodes using VDD_MIF for Exynos4x12
ARM: dts: exynos: Add bus nodes using VDD_INT for Exynos3250
ARM: dts: exynos: Add DMC bus frequency for exynos3250-rinato/monk
ARM: dts: exynos: Add DMC bus node for Exynos3250
ARM: tegra: Enable XUSB on Nyan
ARM: tegra: Enable XUSB on Jetson TK1
ARM: tegra: Enable XUSB on Venice2
ARM: tegra: Add Tegra124 XUSB controller
ARM: tegra: Move Tegra124 to the new XUSB pad controller binding
ARM: dts: r8a7794: Use SYSC "always-on" PM Domain
ARM: dts: r8a7793: Use SYSC "always-on" PM Domain
...
I have only one patch for asm-generic in this release, this one is from
James Hogan and updates the generic system call table for renameat2
so we don't need to provide both renameat and renameat2 in newly
added architectures.
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Merge tag 'asm-generic-4.7' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic
Pull asm-generic cleanup from Arnd Bergmann:
"I have only one patch for asm-generic in this release, this one is
from James Hogan and updates the generic system call table for
renameat2 so we don't need to provide both renameat and renameat2 in
newly added architectures"
* tag 'asm-generic-4.7' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic:
asm-generic: Drop renameat syscall from default list
With the change to sparse IRQs, the lpc32xx platform gets a warning about
conflicting macros:
In file included from arch/arm/mach-lpc32xx/irq.c:31:0:
arch/arm/mach-lpc32xx/include/mach/irqs.h:115:0: warning: "NR_IRQS" redefined
#define NR_IRQS 96
arch/arm/include/asm/irq.h:9:0: note: this is the location of the previous definition
#define NR_IRQS NR_IRQS_LEGACY
One such instance was in the old irq driver that is now removed by
the previous patch, but any other file including mach/irqs.h still
has the issue. Since none of them use this constant, we can just
remove the old definition.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Fixes: 8cb17b5ed0 ("irqchip: Add LPC32xx interrupt controller driver")
New NXP LPC32xx irq chip driver is used instead of a legacy one.
[this also fixes a harmless build warning about the NR_IRQS redefinition]
Signed-off-by: Vladimir Zapolskiy <vz@mleia.com>
Acked-by: Sylvain Lemieux <slemieux.tyco@gmail.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
First cycle with Boris as NAND maintainer! Many (most) bullets stolen from him.
Generic:
* Migrated NAND LED trigger to be a generic MTD trigger
NAND:
* Introduction of the "ECC algorithm" concept, to avoid overloading the ECC
mode field too much more
* Replaced the nand_ecclayout infrastructure with something a little more
flexible (finally!) and future proof
* Rework of the OMAP GPMC and NAND drivers; the TI folks pulled some of
this into their own tree as well
* Prepare the sunxi NAND driver to receive DMA support
* Handle bitflips in erased pages on GPMI revisions that do not support
this in hardware.
SPI NOR:
* Start using the spi_flash_read() API for SPI drivers that support it (i.e.,
SPI drivers with special memory-mapped flash modes)
And other small scattered improvments.
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Merge tag 'for-linus-20160523' of git://git.infradead.org/linux-mtd
Pull MTD updates from Brian Norris:
"First cycle with Boris as NAND maintainer! Many (most) bullets stolen
from him.
Generic:
- Migrated NAND LED trigger to be a generic MTD trigger
NAND:
- Introduction of the "ECC algorithm" concept, to avoid overloading
the ECC mode field too much more
- Replaced the nand_ecclayout infrastructure with something a little
more flexible (finally!) and future proof
- Rework of the OMAP GPMC and NAND drivers; the TI folks pulled some
of this into their own tree as well
- Prepare the sunxi NAND driver to receive DMA support
- Handle bitflips in erased pages on GPMI revisions that do not
support this in hardware.
SPI NOR:
- Start using the spi_flash_read() API for SPI drivers that support
it (i.e., SPI drivers with special memory-mapped flash modes)
And other small scattered improvments"
* tag 'for-linus-20160523' of git://git.infradead.org/linux-mtd: (155 commits)
mtd: spi-nor: support GigaDevice gd25lq64c
mtd: nand_bch: fix spelling of "probably"
mtd: brcmnand: respect ECC algorithm set by NAND subsystem
gpmi-nand: Handle ECC Errors in erased pages
Documentation: devicetree: deprecate "soft_bch" nand-ecc-mode value
mtd: nand: add support for "nand-ecc-algo" DT property
mtd: mtd: drop NAND_ECC_SOFT_BCH enum value
mtd: drop support for NAND_ECC_SOFT_BCH as "soft_bch" mapping
mtd: nand: read ECC algorithm from the new field
mtd: nand: fsmc: validate ECC setup by checking algorithm directly
mtd: nand: set ECC algorithm to Hamming on fallback
staging: mt29f_spinand: set ECC algorithm explicitly
CRIS v32: nand: set ECC algorithm explicitly
mtd: nand: atmel: set ECC algorithm explicitly
mtd: nand: davinci: set ECC algorithm explicitly
mtd: nand: bf5xx: set ECC algorithm explicitly
mtd: nand: omap2: Fix high memory dma prefetch transfer
mtd: nand: omap2: Start dma request before enabling prefetch
mtd: nandsim: add __init attribute
mtd: nand: move of_get_nand_xxx() helpers into nand_base.c
...
- Wire-up new syscalls
- Fix link error
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Merge tag 'microblaze-4.7-rc1' of git://git.monstr.eu/linux-2.6-microblaze
Pull Microblaze updates from Michal Simek:
- Wire-up new syscalls
- Fix link error
* tag 'microblaze-4.7-rc1' of git://git.monstr.eu/linux-2.6-microblaze:
microblaze: pci: export isa_io_base to fix link errors
microblaze: Wire up userfaultfd, membarrier, mlock2 syscalls
Instead of having two functions for cycling through the E820 map in
order to count to be remapped pages and remap them later, just use one
function with a caller supplied sub-function called for each region to
be processed. This eliminates the possibility of a mismatch between
both loops which showed up in certain configurations.
Suggested-by: Ed Swierk <eswierk@skyportsystems.com>
Signed-off-by: Juergen Gross <jgross@suse.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
b4ff8389ed is incomplete: relies on nr_legacy_irqs() to get the number
of legacy interrupts when actually nr_legacy_irqs() returns 0 after
probe_8259A(). Use NR_IRQS_LEGACY instead.
Signed-off-by: Stefano Stabellini <sstabellini@kernel.org>
CC: stable@vger.kernel.org
On slow platforms with unreliable TSC, such as QEMU emulated machines,
it is possible for the kernel to request the next event in the past. In
that case, in the current implementation of xen_vcpuop_clockevent, we
simply return -ETIME. To be precise the Xen returns -ETIME and we pass
it on. However the result of this is a missed event, which simply causes
the kernel to hang.
Instead it is better to always ask the hypervisor for a timer event,
even if the timeout is in the past. That way there are no lost
interrupts and the kernel survives. To do that, remove the
VCPU_SSHOTTMR_future flag.
Signed-off-by: Stefano Stabellini <sstabellini@kernel.org>
Acked-by: Juergen Gross <jgross@suse.com>
Merge yet more updates from Andrew Morton:
- Oleg's "wait/ptrace: assume __WALL if the child is traced". It's a
kernel-based workaround for existing userspace issues.
- A few hotfixes
- befs cleanups
- nilfs2 updates
- sys_wait() changes
- kexec updates
- kdump
- scripts/gdb updates
- the last of the MM queue
- a few other misc things
* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (84 commits)
kgdb: depends on VT
drm/amdgpu: make amdgpu_mn_get wait for mmap_sem killable
drm/radeon: make radeon_mn_get wait for mmap_sem killable
drm/i915: make i915_gem_mmap_ioctl wait for mmap_sem killable
uprobes: wait for mmap_sem for write killable
prctl: make PR_SET_THP_DISABLE wait for mmap_sem killable
exec: make exec path waiting for mmap_sem killable
aio: make aio_setup_ring killable
coredump: make coredump_wait wait for mmap_sem for write killable
vdso: make arch_setup_additional_pages wait for mmap_sem for write killable
ipc, shm: make shmem attach/detach wait for mmap_sem killable
mm, fork: make dup_mmap wait for mmap_sem for write killable
mm, proc: make clear_refs killable
mm: make vm_brk killable
mm, elf: handle vm_brk error
mm, aout: handle vm_brk failures
mm: make vm_munmap killable
mm: make vm_mmap killable
mm: make mmap_sem for write waits killable for mm syscalls
MAINTAINERS: add co-maintainer for scripts/gdb
...
Pull arch/tile updates from Chris Metcalf:
"This is an even quieter cycle than usual"
* git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile:
Fix typo
Fix typo
Fix typo
tile: sort the "select" lines in the TILE/TILEGX configs
tile: clarify barrier semantics of atomic_add_return
tile/defconfigs: Remove CONFIG_IPV6_PRIVACY
Pull libata sata_dwc_460ex updates from Tejun Heo:
"Patches to bring sata_dwc_460ex up to snuff.
It was a separate pull request because it depends on dmaengine dw
platform changes which are now in mainline"
* 'for-4.7-dw' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata: (24 commits)
ata: dwc: add DMADEVICES dependency
powerpc/4xx: Device tree update for the 460ex DWC SATA
ata: sata_dwc_460ex: make debug messages neat
ata: sata_dwc_460ex: supply physical address of FIFO to DMA
ata: sata_dwc_460ex: use devm_ioremap
ata: sata_dwc_460ex: tidy up sata_dwc_clear_dmacr()
ata: sata_dwc_460ex: use readl/writel_relaxed()
ata: sata_dwc_460ex: switch to new dmaengine_terminate_* API
ata: sata_dwc_460ex: add __iomem to register base pointer
ata: sata_dwc_460ex: get rid of incorrect cast
ata: sata_dwc_460ex: get rid of some pointless casts
ata: sata_dwc_460ex: remove empty libata callback
ata: sata_dwc_460ex: correct HOSTDEV{P}_FROM_*() macros
ata: sata_dwc_460ex: get rid of global data
ata: sata_dwc_460ex: add phy support
ata: sata_dwc_460ex: use "dmas" DT property to find dma channel
ata: sata_dwc_460ex: don't call ata_sff_qc_issue() on DMA commands
ata: sata_dwc_460ex: skip dma setup for non-dma commands
ata: sata_dwc_460ex: select only core part of DMA driver
ata: sata_dwc_460ex: DMA is always a flow controller
...
most architectures are relying on mmap_sem for write in their
arch_setup_additional_pages. If the waiting task gets killed by the oom
killer it would block oom_reaper from asynchronous address space reclaim
and reduce the chances of timely OOM resolving. Wait for the lock in
the killable mode and return with EINTR if the task got killed while
waiting.
Signed-off-by: Michal Hocko <mhocko@suse.com>
Acked-by: Andy Lutomirski <luto@amacapital.net> [x86 vdso]
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
vm_brk is allowed to fail but load_aout_binary simply ignores the error
and happily continues. I haven't noticed any problem from that in real
life but later patches will make the failure more likely because vm_brk
will become killable (resp. mmap_sem for write waiting will become
killable) so we should be more careful now.
The error handling should be quite straightforward because there are
calls to vm_mmap which check the error properly already. The only
notable exception is set_brk which is called after beyond_if label. But
nothing indicates that we cannot move it above set_binfmt as the two do
not depend on each other and fail before we do set_binfmt and alter
reference counting.
Signed-off-by: Michal Hocko <mhocko@suse.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This option was replaced by PAGE_COUNTER which is selected by MEMCG.
Signed-off-by: Konstantin Khlebnikov <koct9i@gmail.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Balbir Singh <bsingharora@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Commit 3f625002581b ("kexec: introduce a protection mechanism for the
crashkernel reserved memory") is a similar mechanism for protecting the
crash kernel reserved memory to previous crash_map/unmap_reserved_pages()
implementation, the new one is more generic in name and cleaner in code
(besides, some arch may not be allowed to unmap the pgtable).
Therefore, this patch consolidates them, and uses the new
arch_kexec_protect(unprotect)_crashkres() to replace former
crash_map/unmap_reserved_pages() which by now has been only used by
S390.
The consolidation work needs the crash memory to be mapped initially,
this is done in machine_kdump_pm_init() which is after
reserve_crashkernel(). Once kdump kernel is loaded, the new
arch_kexec_protect_crashkres() implemented for S390 will actually
unmap the pgtable like before.
Signed-off-by: Xunlei Pang <xlpang@redhat.com>
Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com>
Acked-by: Michael Holzheu <holzheu@linux.vnet.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Minfei Huang <mhuang@redhat.com>
Cc: Vivek Goyal <vgoyal@redhat.com>
Cc: Dave Young <dyoung@redhat.com>
Cc: Baoquan He <bhe@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Implement the protection method for the crash kernel memory reservation
for the 64-bit x86 kdump.
Signed-off-by: Xunlei Pang <xlpang@redhat.com>
Cc: Eric Biederman <ebiederm@xmission.com>
Cc: Dave Young <dyoung@redhat.com>
Cc: Minfei Huang <mhuang@redhat.com>
Cc: Vivek Goyal <vgoyal@redhat.com>
Cc: Baoquan He <bhe@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
CONFIG_MIPS32_N32=y but CONFIG_BINFMT_ELF disabled results in the
following linker errors:
arch/mips/built-in.o: In function `elf_core_dump':
binfmt_elfn32.c:(.text+0x23dbc): undefined reference to `elf_core_extra_phdrs'
binfmt_elfn32.c:(.text+0x246e4): undefined reference to `elf_core_extra_data_size'
binfmt_elfn32.c:(.text+0x248d0): undefined reference to `elf_core_write_extra_phdrs'
binfmt_elfn32.c:(.text+0x24ac4): undefined reference to `elf_core_write_extra_data'
CONFIG_MIPS32_O32=y but CONFIG_BINFMT_ELF disabled results in the following
linker errors:
arch/mips/built-in.o: In function `elf_core_dump':
binfmt_elfo32.c:(.text+0x28a04): undefined reference to `elf_core_extra_phdrs'
binfmt_elfo32.c:(.text+0x29330): undefined reference to `elf_core_extra_data_size'
binfmt_elfo32.c:(.text+0x2951c): undefined reference to `elf_core_write_extra_phdrs'
binfmt_elfo32.c:(.text+0x29710): undefined reference to `elf_core_write_extra_data'
This is because binfmt_elfn32 and binfmt_elfo32 are using symbols from
elfcore but for these configurations elfcore will not be built.
Fixed by making elfcore selectable by a separate config symbol which
unlike the current mechanism can also be used from other directories
than kernel/, then having each flavor of ELF that relies on elfcore.o,
select it in Kconfig, including CONFIG_MIPS32_N32 and CONFIG_MIPS32_O32
which fixes this issue.
Link: http://lkml.kernel.org/r/20160520141705.GA1913@linux-mips.org
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Reviewed-by: James Hogan <james.hogan@imgtec.com>
Cc: "Maciej W. Rozycki" <macro@linux-mips.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
m32r allmodconfig build was failing with the error:
ERROR: "smp_flush_cache_all" [drivers/misc/lkdtm.ko] undefined!
lkdtm driver at drivers/misc is using flush_icache_range() which for
m32r is defined as smp_flush_cache_all() if CONFIG_SMP is defined. But
as smp_flush_cache_all() was not exported so the build was failing with
the error of undefined symbol.
Link: http://lkml.kernel.org/r/1464001182-8329-1-git-send-email-sudipm.mukherjee@gmail.com
Signed-off-by: Sudip Mukherjee <sudip.mukherjee@codethink.co.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Depending on config options we will need to use a long jump to reach
ftrace_return_to_handler(). Additionally only compile the
parisc_return_to_handler code when CONFIG_FUNCTION_GRAPH_TRACER is set.
Signed-off-by: Helge Deller <deller@gmx.de>
Pull drm updates from Dave Airlie:
"Here's the main drm pull request for 4.7, it's been a busy one, and
I've been a bit more distracted in real life this merge window. Lots
more ARM drivers, not sure if it'll ever end. I think I've at least
one more coming the next merge window.
But changes are all over the place, support for AMD Polaris GPUs is in
here, some missing GM108 support for nouveau (found in some Lenovos),
a bunch of MST and skylake fixes.
I've also noticed a few fixes from Arnd in my inbox, that I'll try and
get in asap, but I didn't think they should hold this up.
New drivers:
- Hisilicon kirin display driver
- Mediatek MT8173 display driver
- ARC PGU - bitstreamer on Synopsys ARC SDP boards
- Allwinner A13 initial RGB output driver
- Analogix driver for DisplayPort IP found in exynos and rockchip
DRM Core:
- UAPI headers fixes and C++ safety
- DRM connector reference counting
- DisplayID mode parsing for Dell 5K monitors
- Removal of struct_mutex from drivers
- Connector registration cleanups
- MST robustness fixes
- MAINTAINERS updates
- Lockless GEM object freeing
- Generic fbdev deferred IO support
panel:
- Support for a bunch of new panels
i915:
- VBT refactoring
- PLL computation cleanups
- DSI support for BXT
- Color manager support
- More atomic patches
- GEM improvements
- GuC fw loading fixes
- DP detection fixes
- SKL GPU hang fixes
- Lots of BXT fixes
radeon/amdgpu:
- Initial Polaris support
- GPUVM/Scheduler/Clock/Power improvements
- ASYNC pageflip support
- New mesa feature support
nouveau:
- GM108 support
- Power sensor support improvements
- GR init + ucode fixes.
- Use GPU provided topology information
vmwgfx:
- Add host messaging support
gma500:
- Some cleanups and fixes
atmel:
- Bridge support
- Async atomic commit support
fsl-dcu:
- Timing controller for LCD support
- Pixel clock polarity support
rcar-du:
- Misc fixes
exynos:
- Pipeline clock support
- Exynoss4533 SoC support
- HW trigger mode support
- export HDMI_PHY clock
- DECON5433 fixes
- Use generic prime functions
- use DMA mapping APIs
rockchip:
- Lots of little fixes
vc4:
- Render node support
- Gamma ramp support
- DPI output support
msm:
- Mostly cleanups and fixes
- Conversion to generic struct fence
etnaviv:
- Fix for prime buffer handling
- Allow hangcheck to be coalesced with other wakeups
tegra:
- Gamme table size fix"
* 'drm-next' of git://people.freedesktop.org/~airlied/linux: (1050 commits)
drm/edid: add displayid detailed 1 timings to the modelist. (v1.1)
drm/edid: move displayid validation to it's own function.
drm/displayid: Iterate over all DisplayID blocks
drm/edid: move displayid tiled block parsing into separate function.
drm: Nuke ->vblank_disable_allowed
drm/vmwgfx: Report vmwgfx version to vmware.log
drm/vmwgfx: Add VMWare host messaging capability
drm/vmwgfx: Kill some lockdep warnings
drm/nouveau/gr/gf100-: fix race condition in fecs/gpccs ucode
drm/nouveau/core: recognise GM108 chipsets
drm/nouveau/gr/gm107-: fix touching non-existent ppcs in attrib cb setup
drm/nouveau/gr/gk104-: share implementation of ppc exception init
drm/nouveau/gr/gk104-: move rop_active_fbps init to nonctx
drm/nouveau/bios/pll: check BIT table version before trying to parse it
drm/nouveau/bios/pll: prevent oops when limits table can't be parsed
drm/nouveau/volt/gk104: round up in gk104_volt_set
drm/nouveau/fb/gm200: setup mmu debug buffer registers at init()
drm/nouveau/fb/gk20a,gm20b: setup mmu debug buffer registers at init()
drm/nouveau/fb/gf100-: allocate mmu debug buffers
drm/nouveau/fb: allow chipset-specific actions for oneinit()
...
1) I forgot that I had another selftest to stress test the ftrace
instance creation. It was actually suppose to go into the 4.6
merge window, but I never committed it. I almost forgot about it
again, but noticed it was missing from your tree.
2) Soumya PN sent me a clean up patch to not disable interrupts when
taking the tasklist_lock for read, as it's unnecessary because
that lock is never taken for write in irq context.
3) Newer gcc's can cause the jump in the function_graph code to the
global ftrace_stub label to be a short jump instead of a long one.
As that jump is dynamically converted to jump to the trace code to
do function graph tracing, and that conversion expects a long jump
it can corrupt the ftrace_stub itself (it's directly after that call).
One way to prevent gcc from using a short jump is to declare the
ftrace_stub as a weak function, which we do here to keep gcc from
optimizing too much.
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Merge tag 'trace-v4.7-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
Pull motr tracing updates from Steven Rostedt:
"Three more changes.
- I forgot that I had another selftest to stress test the ftrace
instance creation. It was actually suppose to go into the 4.6
merge window, but I never committed it. I almost forgot about it
again, but noticed it was missing from your tree.
- Soumya PN sent me a clean up patch to not disable interrupts when
taking the tasklist_lock for read, as it's unnecessary because that
lock is never taken for write in irq context.
- Newer gcc's can cause the jump in the function_graph code to the
global ftrace_stub label to be a short jump instead of a long one.
As that jump is dynamically converted to jump to the trace code to
do function graph tracing, and that conversion expects a long jump
it can corrupt the ftrace_stub itself (it's directly after that
call). One way to prevent gcc from using a short jump is to
declare the ftrace_stub as a weak function, which we do here to
keep gcc from optimizing too much"
* tag 'trace-v4.7-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
ftrace/x86: Set ftrace_stub to weak to prevent gcc from using short jumps to it
ftrace: Don't disable irqs when taking the tasklist_lock read_lock
ftracetest: Add instance created, delete, read and enable event test
Pull sparc updates from David Miller:
"Some 32-bit kgdb cleanups from Sam Ravnborg, and a hugepage TLB flush
overhead fix on 64-bit from Nitin Gupta"
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc:
sparc64: Reduce TLB flushes during hugepte changes
aeroflex/greth: fix warning about unused variable
openprom: fix warning
sparc32: drop superfluous cast in calls to __nocache_pa()
sparc32: fix build with STRICT_MM_TYPECHECKS
sparc32: use proper prototype for trapbase
sparc32: drop local prototype in kgdb_32
sparc32: drop hardcoding trap_level in kgdb_trap
I'm looking at trying to possibly merge the 32-bit and 64-bit versions
of the x86 uaccess.h implementation, but first this needs to be cleaned
up.
For example, the 32-bit version of "__copy_from_user_inatomic()" is
mostly the special cases for the constant size, and it's actually almost
never relevant. Most users aren't actually using a constant size
anyway, and the few cases that do small constant copies are better off
just using __get_user() instead.
So get rid of the unnecessary complexity.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
I'm looking at trying to possibly merge the 32-bit and 64-bit versions
of the x86 uaccess.h implementation, but first this needs to be cleaned
up.
For example, the 32-bit version of "__copy_to_user_inatomic()" is mostly
the special cases for the constant size, and it's actually never
relevant. Every user except for one aren't actually using a constant
size anyway, and the one user that uses it is better off just using
__put_user() instead.
So get rid of the unnecessary complexity.
[ The same cleanup should likely happen to __copy_from_user_inatomic()
as well, but that one has a lot more users that I need to take a look
at first ]
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
The attached patch updates the parisc version of futex.h to match the
current generic implementation except for the spinlock code.
Signed-off-by: John David Anglin <dave.anglin@bell.net>
Signed-off-by: Helge Deller <deller@gmx.de>
When enabling all-branch ftrace support (CONFIG_PROFILE_ALL_BRANCHES)
the kernel gets really huge and some ftrace assembler functions like
mcount can't reach the ftrace helper functions which are written in C.
Avoid this problem of too distant branches by moving the ftrace C-helper
functions into the .text.hot section which is put in front of the
standard .text section by the linker.
Signed-off-by: Helge Deller <deller@gmx.de>
Add a native implementation for the sched_clock() function which utilizes the
processor-internal cycle counter (Control Register 16) as high-resolution time
source.
With this patch we now get much more fine-grained resolutions in various
in-kernel time measurements (e.g. when viewing the function tracing logs), and
probably a more accurate scheduling on SMP systems.
There are a few specific implementation details in this patch:
1. On a 32bit kernel we emulate the higher 32bits of the required 64-bit
resolution of sched_clock() by increasing a per-cpu counter at every
wrap-around of the 32bit cycle counter.
2. In a SMP system, the cycle counters of the various CPUs are not syncronized
(similiar to the TSC in a x86_64 system). To cope with this we define
HAVE_UNSTABLE_SCHED_CLOCK and let the upper layers do the adjustment work.
3. Since we need HAVE_UNSTABLE_SCHED_CLOCK, we need to provide a cmpxchg64()
function even on a 32-bit kernel.
4. A 64-bit SMP kernel which is started on a UP system will mark the
sched_clock() implementation as "stable", which means that we don't expect any
jumps in the returned counter. This is true because we then run only on one
CPU.
Signed-off-by: Helge Deller <deller@gmx.de>
By adding TRACEHOOK support we now get a clean user interface to access
registers via PTRACE_GETREGS, PTRACE_SETREGS, PTRACE_GETFPREGS and
PTRACE_SETFPREGS.
The user-visible regset struct user_regs_struct and user_fp_struct are
modelled similiar to x86 and can be accessed via PTRACE_GETREGSET.
Signed-off-by: Helge Deller <deller@gmx.de>
This patch simplifies the code for get_user() and put_user() a lot.
Instead of accessing kernel memory (%sr0) and userspace memory (%sr3)
hard-coded in the assembler instruction, we now preload %sr2 with either
%sr0 (for accessing KERNEL_DS) or with sr3 (to access USER_DS) and
use %sr2 in the load directly.
The generated code avoids a branch and speeds up execution by generating
less assembler instructions.
Signed-off-by: Helge Deller <deller@gmx.de>
Tested-by: Rolf Eike Beer <eike-kernel@sf-tec.de>
This patch adds support for the TIF_SYSCALL_TRACEPOINT on the parisc
architecture. Basically, it calls the appropriate tracepoints on syscall
entry and exit.
Signed-off-by: Helge Deller <deller@gmx.de>
Commit b3c1be1b78 ("base: isa: Remove X86_32 dependency") made ISA
support available on x86-64 too. That's not right - while there are
some LPC-style devices that might be useful still and be based on
ISA-like IP blocks, that is *not* an excuse to try to enable any random
legacy drivers.
Such drivers should be individually enabled and made to perhaps depend
on ISA_DMA_API instead (which we have continued to support on x86-64).
Or we could add another "ISA_XYZ_API" that we support that doesn't
enable random old drivers that aren't even 64-bit clean nor do we have
any test coverage for.
Turning off ISA will now also turn off some drivers that have been
marked as depending on it as part of this series, and that used to work
on modern platforms.
See for example commits ad7afc38eab3..cc736607c86d, which may also need
to be reverted.
This commit means that the warnings that came in due to enabling ISA
widely are now gone again.
Acked-by: William Breathitt Gray <vilhelm.gray@gmail.com>
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: Guenter Roeck <linux@roeck-us.net>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Merge more updates from Andrew Morton:
- the rest of MM
- KASAN updates
- procfs updates
- exit, fork updates
- printk updates
- lib/ updates
- radix-tree testsuite updates
- checkpatch updates
- kprobes updates
- a few other misc bits
* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (162 commits)
samples/kprobes: print out the symbol name for the hooks
samples/kprobes: add a new module parameter
kprobes: add the "tls" argument for j_do_fork
init/main.c: simplify initcall_blacklisted()
fs/efs/super.c: fix return value
checkpatch: improve --git <commit-count> shortcut
checkpatch: reduce number of `git log` calls with --git
checkpatch: add support to check already applied git commits
checkpatch: add --list-types to show message types to show or ignore
checkpatch: advertise the --fix and --fix-inplace options more
checkpatch: whine about ACCESS_ONCE
checkpatch: add test for keywords not starting on tabstops
checkpatch: improve CONSTANT_COMPARISON test for structure members
checkpatch: add PREFER_IS_ENABLED test
lib/GCD.c: use binary GCD algorithm instead of Euclidean
radix-tree: free up the bottom bit of exceptional entries for reuse
dax: move RADIX_DAX_ definitions to dax.c
radix-tree: make radix_tree_descend() more useful
radix-tree: introduce radix_tree_replace_clear_tags()
radix-tree: tidy up __radix_tree_create()
...
Here's the "big" driver core update for 4.7-rc1.
Mostly just debugfs changes, the long-known and messy races with removing
debugfs files should be fixed thanks to the great work of Nicolai Stange. We
also have some isa updates in here (the x86 maintainers told me to take it
through this tree), a new warning when we run out of dynamic char major
numbers, and a few other assorted changes, details in the shortlog.
All have been in linux-next for some time with no reported issues.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'driver-core-4.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core
Pull driver core updates from Greg KH:
"Here's the "big" driver core update for 4.7-rc1.
Mostly just debugfs changes, the long-known and messy races with
removing debugfs files should be fixed thanks to the great work of
Nicolai Stange. We also have some isa updates in here (the x86
maintainers told me to take it through this tree), a new warning when
we run out of dynamic char major numbers, and a few other assorted
changes, details in the shortlog.
All have been in linux-next for some time with no reported issues"
* tag 'driver-core-4.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (32 commits)
Revert "base: dd: don't remove driver_data in -EPROBE_DEFER case"
gpio: ws16c48: Utilize the ISA bus driver
gpio: 104-idio-16: Utilize the ISA bus driver
gpio: 104-idi-48: Utilize the ISA bus driver
gpio: 104-dio-48e: Utilize the ISA bus driver
watchdog: ebc-c384_wdt: Utilize the ISA bus driver
iio: stx104: Utilize the module_isa_driver and max_num_isa_dev macros
iio: stx104: Add X86 dependency to STX104 Kconfig option
Documentation: Add ISA bus driver documentation
isa: Implement the max_num_isa_dev macro
isa: Implement the module_isa_driver macro
pnp: pnpbios: Add explicit X86_32 dependency to PNPBIOS
isa: Decouple X86_32 dependency from the ISA Kconfig option
driver-core: use 'dev' argument in dev_dbg_ratelimited stub
base: dd: don't remove driver_data in -EPROBE_DEFER case
kernfs: Move faulting copy_user operations outside of the mutex
devcoredump: add scatterlist support
debugfs: unproxify files created through debugfs_create_u32_array()
debugfs: unproxify files created through debugfs_create_blob()
debugfs: unproxify files created through debugfs_create_bool()
...
Here's the large TTY and Serial driver update for 4.7-rc1.
A few new serial drivers are added here, and Peter has fixed a bunch of
long-standing bugs in the tty layer and serial drivers as normal. Full
details in the shortlog.
All of these have been in linux-next for a while with no reported issues.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'tty-4.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty
Pull tty and serial driver updates from Greg KH:
"Here's the large TTY and Serial driver update for 4.7-rc1.
A few new serial drivers are added here, and Peter has fixed a bunch
of long-standing bugs in the tty layer and serial drivers as normal.
Full details in the shortlog.
All of these have been in linux-next for a while with no reported
issues"
* tag 'tty-4.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (88 commits)
MAINTAINERS: 8250: remove website reference
serial: core: Fix port mutex assert if lockdep disabled
serial: 8250_dw: fix wrong logic in dw8250_check_lcr()
tty: vt, finish looping on duplicate
tty: vt, return error when con_startup fails
QE-UART: add "fsl,t1040-ucc-uart" to of_device_id
serial: mctrl_gpio: Drop support for out1-gpios and out2-gpios
serial: 8250dw: Add device HID for future AMD UART controller
Fix OpenSSH pty regression on close
serial: mctrl_gpio: add IRQ locking
serial: 8250: Integrate Fintek into 8250_base
serial: mps2-uart: add support for early console
serial: mps2-uart: add MPS2 UART driver
dt-bindings: document the MPS2 UART bindings
serial: sirf: Use generic uart-has-rtscts DT property
serial: sirf: Introduce helper variable struct device_node *np
serial: mxs-auart: Use generic uart-has-rtscts DT property
serial: imx: Use generic uart-has-rtscts DT property
doc: DT: Add Generic Serial Device Tree Bindings
serial: 8250: of: Make tegra_serial_handle_break() static
...
Linus Torvalds