x86: fix trigger_all_cpu_backtrace() implementation

Fix the x86 implementation of trigger_all_cpu_backtrace(), which was
previously (accidentally, as far as I can tell) disabled to always return
false as on architectures that do not implement this function.

trigger_all_cpu_backtrace(), as defined in include/linux/nmi.h, should
call arch_trigger_all_cpu_backtrace() if available, or return false if the
underlying arch doesn't implement this function.

x86 did provide a suitable arch_trigger_all_cpu_backtrace()
implementation, but it wasn't actually being used because it was declared
in asm/nmi.h, which linux/nmi.h doesn't include.  Also, linux/nmi.h
couldn't easily be fixed by including asm/nmi.h, because that file is not
available on all architectures.

I am proposing to fix this by moving the x86 definition of
arch_trigger_all_cpu_backtrace() to asm/irq.h.

Tested: echo l > /proc/sysrq-trigger

Before the change, this uses a fallback implementation which shows
backtraces on active CPUs (using smp_call_function_interrupt()).

After the change, this shows NMI backtraces on all CPUs.

Signed-off-by: Michel Lespinasse <walken@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

drivers/platform/x86/intel_ips.c: convert to module_pci_driver

Signed-off-by: Libo Chen <libo.chen@huawei.com>
Cc: Matthew Garrett <matthew.garrett@nebula.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

include/linux/smp.h:on_each_cpu(): switch back to a macro

f21afc25f9ed4 ("smp.h: Use local_irq_{save,restore}() in !SMP version of
on_each_cpu()") converted on_each_cpu() to a C function.  This required
inclusion of irqflags.h, which broke ia64 and mn10300 (at least) due to
header ordering hell.

Switch on_each_cpu() back to a macro to fix this.

Reported-by: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: David Daney <david.daney@cavium.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

metag: fix mm/hugetlb.c build breakage

Commit 106c992a5ebef ("mm/hugetlb: add more arch-defined huge_pte
functions") merged in v3.10-rc1.

The above commit added an include of <asm-generic/hugetlb.h> to each
architecture's <asm/hugetlb.h> (except s390).  Unfortunately metag was
missed which resulted in build errors when hugetlbfs is enabled (see
below).  Add the include for metag too to fix the build errors.

mm/hugetlb.c In function 'make_huge_pte':
mm/hugetlb.c +2250 : error: implicit declaration of function 'huge_pte_mkwrite'
mm/hugetlb.c +2250 : error: implicit declaration of function 'huge_pte_mkdirty'
mm/hugetlb.c +2250 : error: implicit declaration of function 'mk_huge_pte'
mm/hugetlb.c +2251 : error: incompatible types in assignment
mm/hugetlb.c +2254 : error: incompatible type for argument 1 of 'huge_pte_wrprotect'
mm/hugetlb.c In function 'set_huge_ptep_writable':
mm/hugetlb.c +2268 : error: incompatible types in assignment
mm/hugetlb.c In function '__unmap_hugepage_range':
mm/hugetlb.c +2383 : error: implicit declaration of function 'huge_pte_clear'
mm/hugetlb.c +2407 : error: implicit declaration of function 'huge_pte_dirty'
mm/hugetlb.c In function 'hugetlb_fault':
mm/hugetlb.c +2860 : error: implicit declaration of function 'huge_pte_write'
mm/hugetlb.c +2895 : error: incompatible types in assignment
mm/hugetlb.c In function 'hugetlb_change_protection':
mm/hugetlb.c +3047 : error: implicit declaration of function 'huge_pte_modify'
mm/hugetlb.c +3047 : error: incompatible type for argument 1 of 'pte_mkhuge'
make[1]: *** [mm/hugetlb.o] Error 1
make: *** [mm/hugetlb.o] Error 2

Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Cc: Michal Hocko <mhocko@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

fput-task_work_add-can-fail-if-the-caller-has-passed-exit_task_work-fix

add comment

Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Andrey Vagin <avagin@openvz.org>
Cc: David Howells <dhowells@redhat.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

fix up for fw_load_abort API change

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>

Merge remote-tracking branch 'arm64-hugepages/for-next/hugepages'

Conflicts:
arch/arm64/Kconfig
arch/arm64/include/asm/pgtable-hwdef.h
arch/arm64/include/asm/pgtable.h

Merge remote-tracking branch 'lzo-update/lzo-update'

Merge remote-tracking branch 'clk/clk-next'

Conflicts:
drivers/clk/tegra/clk-tegra114.c

Merge remote-tracking branch 'userns/for-next'

Merge remote-tracking branch 'pwm/for-next'

Merge remote-tracking branch 'samsung/for-next'

Conflicts:
drivers/usb/Kconfig

Merge remote-tracking branch 'renesas/next'

Conflicts:
arch/arm/mach-shmobile/board-bockw.c
arch/arm/mach-shmobile/clock-r8a7778.c
arch/arm/mach-shmobile/include/mach/r8a7778.h
include/linux/serial_sci.h
include/uapi/linux/serial_core.h

Merge remote-tracking branch 'mvebu/for-next'

Conflicts:
arch/arm/boot/dts/kirkwood-6281.dtsi

Merge remote-tracking branch 'msm/for-next'

Merge remote-tracking branch 'imx-mxs/for-next'

Conflicts:
arch/arm/Kconfig.debug
arch/arm/mach-mxs/mach-mxs.c

Merge remote-tracking branch 'ep93xx/ep93xx-for-next'

Merge remote-tracking branch 'arm-soc/for-next'

Conflicts:
arch/arm/mach-shmobile/clock-r8a7740.c
arch/arm/mach-shmobile/clock-r8a7778.c
drivers/tty/serial/xilinx_uartps.c
drivers/usb/phy/phy-rcar-usb.c

Merge remote-tracking branch 'mailbox/dbx500-prcmu-mailbox'

Merge remote-tracking branch 'gpio-lw/for-next'

Merge remote-tracking branch 'gpio/gpio/next'

Merge remote-tracking branch 'irqdomain/irqdomain/next'

Conflicts:
kernel/irq/irqdomain.c

Merge remote-tracking branch 'pinctrl/for-next'

Conflicts:
drivers/net/ethernet/ti/davinci_mdio.c

Merge remote-tracking branch 'bcon/master'

Conflicts:
drivers/block/Kconfig

Merge remote-tracking branch 'char-misc/char-misc-next'

Merge remote-tracking branch 'staging/staging-next'

Conflicts:
Documentation/devicetree/bindings/thermal/ti_soc_thermal.txt
drivers/staging/serqt_usb2/serqt_usb2.c
drivers/staging/silicom/bpctl_mod.c
drivers/thermal/ti-soc-thermal/ti-thermal-common.c

Merge remote-tracking branch 'usb/usb-next'

Merge remote-tracking branch 'tty/tty-next'

Merge remote-tracking branch 'driver-core/driver-core-next'

Conflicts:
drivers/base/cpu.c
drivers/base/firmware_class.c
drivers/base/memory.c
include/linux/platform_device.h

next-20130607/leds

Merge remote-tracking branch 'regmap/for-next'

Merge remote-tracking branch 'workqueues/for-next'

Merge remote-tracking branch 'percpu/for-next'

Merge remote-tracking branch 'xen-arm/linux-next'

Merge remote-tracking branch 'xen-two/linux-next'

Merge remote-tracking branch 'kvm-arm/kvm-arm-next'

Merge remote-tracking branch 'kvm/linux-next'

Conflicts:
arch/s390/include/asm/pgtable.h

Merge remote-tracking branch 'rcu/rcu/next'

Merge remote-tracking branch 'spi-mb/for-next'

Merge remote-tracking branch 'devicetree/devicetree/next'

Merge remote-tracking branch 'edac-amd/for-next'

Merge remote-tracking branch 'trivial/for-next'

Conflicts:
Documentation/networking/netlink_mmap.txt

Merge remote-tracking branch 'watchdog/master'

Merge remote-tracking branch 'selinux/master'

Merge remote-tracking branch 'security/next'

Merge remote-tracking branch 'regulator/for-next'

Merge remote-tracking branch 'omap_dss2/for-next'

Merge remote-tracking branch 'fbdev/for-next'

Conflicts:
drivers/video/of_display_timing.c

Merge remote-tracking branch 'battery/master'

Merge remote-tracking branch 'mfd/master'

Merge remote-tracking branch 'md/for-next'

Merge remote-tracking branch 'slab/for-next'

Merge remote-tracking branch 'kgdb/kgdb-next'

Merge remote-tracking branch 'mmc/mmc-next'

Merge branch 'device-mapper/master'

Merge remote-tracking branch 'block/for-next'

Conflicts:
include/linux/cgroup.h

Merge remote-tracking branch 'cgroup/for-next'

Merge remote-tracking branch 'input-mt/for-next'

Merge remote-tracking branch 'input/next'

Merge remote-tracking branch 'virtio/virtio-next'

Merge remote-tracking branch 'modules/modules-next'

Merge remote-tracking branch 'sound-asoc/for-next'

Merge remote-tracking branch 'sound/for-next'

Merge remote-tracking branch 'drm-tegra/drm/for-next'

Merge remote-tracking branch 'drm-intel/for-linux-next'

Conflicts:
drivers/gpu/drm/i915/intel_display.c
drivers/gpu/drm/i915/intel_fb.c
drivers/gpu/drm/i915/intel_sdvo.c

Merge remote-tracking branch 'drm/drm-next'

Conflicts:
drivers/gpu/drm/i915/intel_sdvo.c

Merge remote-tracking branch 'crypto/master'

Merge remote-tracking branch 'l2-mtd/master'

Merge remote-tracking branch 'bluetooth/master'

Conflicts:
net/bluetooth/mgmt.c

Merge remote-tracking branch 'wireless-next/master'

Merge remote-tracking branch 'ipsec-next/master'

Merge remote-tracking branch 'net-next/master'

Conflicts:
drivers/net/wireless/ath/ath9k/Kconfig
drivers/net/xen-netback/netback.c
net/batman-adv/bat_iv_ogm.c

Merge remote-tracking branch 'slave-dma/next'

Merge remote-tracking branch 'target-updates/for-next'

Merge remote-tracking branch 'scsi/for-next'

Merge remote-tracking branch 'dlm/next'

Merge remote-tracking branch 'ubi/linux-next'

Merge remote-tracking branch 'ieee1394/for-next'

Merge remote-tracking branch 'thermal/next'

Merge remote-tracking branch 'cpuidle/cpuidle-next'

Conflicts:
drivers/acpi/processor_driver.c
drivers/base/power/qos.c

Merge remote-tracking branch 'idle/next'

Merge remote-tracking branch 'pm/linux-next'

Merge remote-tracking branch 'libata/for-next'

Merge remote-tracking branch 'kbuild/for-next'

Merge remote-tracking branch 'v4l-dvb/master'

Merge remote-tracking branch 'hwmon-staging/hwmon-next'

Merge remote-tracking branch 'i2c/i2c/for-next'

Merge remote-tracking branch 'hid/for-next'

Merge remote-tracking branch 'pci/next'

Conflicts:
drivers/acpi/pci_root.c
drivers/pci/probe.c
include/linux/aer.h

Merge remote-tracking branch 'xfs/for-next'

Merge remote-tracking branch 'v9fs/for-next'

Merge remote-tracking branch 'ocfs2/linux-next'

Merge remote-tracking branch 'nfsd/nfsd-next'

Merge remote-tracking branch 'nfs/linux-next'

Merge remote-tracking branch 'logfs/master'

Merge remote-tracking branch 'jfs/jfs-next'

Merge remote-tracking branch 'gfs2/master'

Merge remote-tracking branch 'fscache/fscache'

Merge remote-tracking branch 'f2fs/dev'

Merge remote-tracking branch 'ext4/dev'