Merge tag 'v5.7-rc6' into objtool/core, to pick up fixes and resolve semantic conflict

	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

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.

consideration the effect of compiler optimisations which may occur

when tail-calls are used and marked with the noreturn GCC attribute.

Probed Pointers from BPF / tracing

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

::

	%pks	kernel string

	%pus	user string

The ``k`` and ``u`` specifiers are used for printing prior probed memory from

either kernel memory (k) or user memory (u). The subsequent ``s`` specifier

results in printing a string. For direct use in regular vsnprintf() the (k)

and (u) annotation is ignored, however, when used out of BPF's bpf_trace_printk(),

for example, it reads the memory it is pointing to without faulting.

Kernel Pointers

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

DT_DOC_CHECKER ?= dt-doc-validate

DT_EXTRACT_EX ?= dt-extract-example

DT_MK_SCHEMA ?= dt-mk-schema

DT_MK_SCHEMA_USERONLY_FLAG := $(if $(DT_SCHEMA_FILES), -u)

quiet_cmd_chk_binding = CHKDT   $(patsubst $(srctree)/%,%,$<)

      cmd_chk_binding = $(DT_DOC_CHECKER) -u $(srctree)/$(src) $< ; \

# Use full schemas when checking %.example.dts

DT_TMP_SCHEMA := $(obj)/processed-schema-examples.yaml

find_cmd = find $(srctree)/$(src) \( -name '*.yaml' ! \

		-name 'processed-schema*' ! \

		-name '*.example.dt.yaml' \)

quiet_cmd_mk_schema = SCHEMA  $@

      cmd_mk_schema = $(DT_MK_SCHEMA) $(DT_MK_SCHEMA_FLAGS) -o $@ $(real-prereqs)

      cmd_mk_schema = rm -f $@ ; \

                      $(if $(DT_MK_SCHEMA_FLAGS), \

                           echo $(real-prereqs), \

                           $(find_cmd)) | \

                      xargs $(DT_MK_SCHEMA) $(DT_MK_SCHEMA_FLAGS) >> $@

DT_DOCS = $(addprefix $(src)/, \

	$(shell \

	cd $(srctree)/$(src) && \

	find * \( -name '*.yaml' ! \

		-name 'processed-schema*' ! \

		-name '*.example.dt.yaml' \) \

	))

DT_DOCS = $(shell $(find_cmd) | sed -e 's|^$(srctree)/||')

DT_SCHEMA_FILES ?= $(DT_DOCS)

$(obj)/processed-schema-examples.yaml: $(DT_DOCS) FORCE

	$(call if_changed,mk_schema)

$(obj)/processed-schema.yaml: DT_MK_SCHEMA_FLAGS := -u

$(obj)/processed-schema.yaml: DT_MK_SCHEMA_FLAGS := $(DT_MK_SCHEMA_USERONLY_FLAG)

$(obj)/processed-schema.yaml: $(DT_SCHEMA_FILES) FORCE

	$(call if_changed,mk_schema)