Merge tag 'tags/linear-ranges-lib' into psy-next

  - 'for_each_card_auxs'

  - 'for_each_card_auxs_safe'

  - 'for_each_card_components'

  - 'for_each_card_dapms'

  - 'for_each_card_pre_auxs'

  - 'for_each_card_prelinks'

  - 'for_each_card_rtds'

  - 'for_each_card_rtds_safe'

  - 'for_each_card_widgets'

  - 'for_each_card_widgets_safe'

  - 'for_each_cgroup_storage_type'

  - 'for_each_child_of_node'

  - 'for_each_clear_bit'

  - 'for_each_cpu_and'

  - 'for_each_cpu_not'

  - 'for_each_cpu_wrap'

  - 'for_each_dapm_widgets'

  - 'for_each_dev_addr'

  - 'for_each_dev_scope'

  - 'for_each_displayid_db'

  - 'for_each_dpcm_fe'

  - 'for_each_drhd_unit'

  - 'for_each_dss_dev'

  - 'for_each_efi_handle'

  - 'for_each_efi_memory_desc'

  - 'for_each_efi_memory_desc_in_map'

  - 'for_each_element'

  - 'for_each_ip_tunnel_rcu'

  - 'for_each_irq_nr'

  - 'for_each_link_codecs'

  - 'for_each_link_cpus'

  - 'for_each_link_platforms'

  - 'for_each_lru'

  - 'for_each_matching_node'

  - 'for_each_pci_bridge'

  - 'for_each_pci_dev'

  - 'for_each_pci_msi_entry'

  - 'for_each_pcm_streams'

  - 'for_each_populated_zone'

  - 'for_each_possible_cpu'

  - 'for_each_present_cpu'

  - 'for_each_property_of_node'

  - 'for_each_registered_fb'

  - 'for_each_reserved_mem_region'

  - 'for_each_rtd_codec_dai'

  - 'for_each_rtd_codec_dai_rollback'

  - 'for_each_rtd_codec_dais'

  - 'for_each_rtd_codec_dais_rollback'

  - 'for_each_rtd_components'

  - 'for_each_rtd_cpu_dais'

  - 'for_each_rtd_cpu_dais_rollback'

  - 'for_each_rtd_dais'

  - 'for_each_set_bit'

  - 'for_each_set_bit_from'

  - 'for_each_set_clump8'

  - 'klp_for_each_object'

  - 'klp_for_each_object_safe'

  - 'klp_for_each_object_static'

  - 'kunit_suite_for_each_test_case'

  - 'kvm_for_each_memslot'

  - 'kvm_for_each_vcpu'

  - 'list_for_each'

  - 'of_property_for_each_string'

  - 'of_property_for_each_u32'

  - 'pci_bus_for_each_resource'

  - 'pcm_for_each_format'

  - 'ping_portaddr_for_each_entry'

  - 'plist_for_each'

  - 'plist_for_each_continue'

MacroBlockBegin: ''

MacroBlockEnd: ''

MaxEmptyLinesToKeep: 1

NamespaceIndentation: Inner

NamespaceIndentation: None

#ObjCBinPackProtocolList: Auto # Unknown to clang-format-5.0

ObjCBlockIndentWidth: 8

ObjCSpaceAfterProperty: true

	space-efficient. If this option is not present, large padding is

	used - that is for compatibility with older kernels.

The journal mode (D/J), buffer_sectors, journal_watermark, commit_time can

be changed when reloading the target (load an inactive table and swap the

tables with suspend and resume). The other arguments should not be changed

when reloading the target because the layout of disk data depend on them

and the reloaded target would be non-functional.

allow_discards

	Allow block discard requests (a.k.a. TRIM) for the integrity device.

	Discards are only allowed to devices using internal hash.

The journal mode (D/J), buffer_sectors, journal_watermark, commit_time and

allow_discards can be changed when reloading the target (load an inactive

table and swap the tables with suspend and resume). The other arguments

should not be changed when reloading the target because the layout of disk

data depend on them and the reloaded target would be non-functional.

The layout of the formatted block device:

	usbcore.old_scheme_first=

			[USB] Start with the old device initialization

			scheme,  applies only to low and full-speed devices

			 (default 0 = off).

			scheme (default 0 = off).

	usbcore.usbfs_memory_mb=

			[USB] Memory limit (in MB) for buffers allocated by

modprobe

========

This gives the full path of the modprobe command which the kernel will

use to load modules. This can be used to debug module loading

requests::

The full path to the usermode helper for autoloading kernel modules,

by default "/sbin/modprobe".  This binary is executed when the kernel

requests a module.  For example, if userspace passes an unknown

filesystem type to mount(), then the kernel will automatically request

the corresponding filesystem module by executing this usermode helper.

This usermode helper should insert the needed module into the kernel.

This sysctl only affects module autoloading.  It has no effect on the

ability to explicitly insert modules.

This sysctl can be used to debug module loading requests::

    echo '#! /bin/sh' > /tmp/modprobe

    echo 'echo "$@" >> /tmp/modprobe.log' >> /tmp/modprobe

    chmod a+x /tmp/modprobe

    echo /tmp/modprobe > /proc/sys/kernel/modprobe

This only applies when the *kernel* is requesting that the module be

loaded; it won't have any effect if the module is being loaded

explicitly using ``modprobe`` from userspace.

Alternatively, if this sysctl is set to the empty string, then module

autoloading is completely disabled.  The kernel will not try to

execute a usermode helper at all, nor will it call the

kernel_module_request LSM hook.

If CONFIG_STATIC_USERMODEHELPER=y is set in the kernel configuration,

then the configured static usermode helper overrides this sysctl,

except that the empty string is still accepted to completely disable

module autoloading as described above.

modules_disabled

================

     successful IPC object allocation. If an IPC object allocation syscall

     fails, it is undefined if the value remains unmodified or is reset to -1.

modprobe:

=========

The path to the usermode helper for autoloading kernel modules, by

default "/sbin/modprobe".  This binary is executed when the kernel

requests a module.  For example, if userspace passes an unknown

filesystem type to mount(), then the kernel will automatically request

the corresponding filesystem module by executing this usermode helper.

This usermode helper should insert the needed module into the kernel.

This sysctl only affects module autoloading.  It has no effect on the

ability to explicitly insert modules.

If this sysctl is set to the empty string, then module autoloading is

completely disabled.  The kernel will not try to execute a usermode

helper at all, nor will it call the kernel_module_request LSM hook.

If CONFIG_STATIC_USERMODEHELPER=y is set in the kernel configuration,

then the configured static usermode helper overrides this sysctl,

except that the empty string is still accepted to completely disable

module autoloading as described above.

nmi_watchdog

============

Version 1 of the Activity Monitors architecture implements a counter group

of four fixed and architecturally defined 64-bit event counters.

- CPU cycle counter: increments at the frequency of the CPU.

- Constant counter: increments at the fixed frequency of the system

  clock.

Firmware (code running at higher exception levels, e.g. arm-tf) support is

needed to:

- Enable access for lower exception levels (EL2 and EL1) to the AMU

  registers.

- Enable the counters. If not enabled these will read as 0.

The fixed counters of AMUv1 are accessible though the following system

register definitions:

- SYS_AMEVCNTR0_CORE_EL0

- SYS_AMEVCNTR0_CONST_EL0

- SYS_AMEVCNTR0_INST_RET_EL0

----------------

Currently, access from userspace to the AMU registers is disabled due to:

- Security reasons: they might expose information about code executed in

  secure mode.

- Purpose: AMU counters are intended for system management use.

Currently, access from userspace (EL0) and kernelspace (EL1) on the KVM

guest side is disabled due to:

- Security reasons: they might expose information about code executed

  by other guests or the host.