Merge 4.18-rc3 into tty-next

``intel_pstate`` exposes several global attributes (files) in ``sysfs`` to

control its functionality at the system level.  They are located in the

``/sys/devices/system/cpu/cpufreq/intel_pstate/`` directory and affect all

CPUs.

``/sys/devices/system/cpu/intel_pstate/`` directory and affect all CPUs.

Some of them are not present if the ``intel_pstate=per_cpu_perf_limits``

argument is passed to the kernel in the command line.

	but it affects the maximum possible value of per-policy P-state	limits

	(see `Interpretation of Policy Attributes`_ below for details).

``hwp_dynamic_boost``

	This attribute is only present if ``intel_pstate`` works in the

	`active mode with the HWP feature enabled <Active Mode With HWP_>`_ in

	the processor.  If set (equal to 1), it causes the minimum P-state limit

	to be increased dynamically for a short time whenever a task previously

	waiting on I/O is selected to run on a given logical CPU (the purpose

	of this mechanism is to improve performance).

	This setting has no effect on logical CPUs whose minimum P-state limit

	is directly set to the highest non-turbo P-state or above it.

.. _status_attr:

``status``

Spreadtrum SC27xx PMIC Vibrator

Required properties:

- compatible: should be "sprd,sc2731-vibrator".

- reg: address of vibrator control register.

Example :

	sc2731_pmic: pmic@0 {

		compatible = "sprd,sc2731";

		reg = <0>;

		spi-max-frequency = <26000000>;

		interrupts = <GIC_SPI 31 IRQ_TYPE_LEVEL_HIGH>;

		interrupt-controller;

		#interrupt-cells = <2>;

		#address-cells = <1>;

		#size-cells = <0>;

		vibrator@eb4 {

			compatible = "sprd,sc2731-vibrator";

			reg = <0xeb4>;

		};

	};

	int (*iterate) (struct file *, struct dir_context *);

	int (*iterate_shared) (struct file *, struct dir_context *);

	__poll_t (*poll) (struct file *, struct poll_table_struct *);

	struct wait_queue_head * (*get_poll_head)(struct file *, __poll_t);

	__poll_t (*poll_mask) (struct file *, __poll_t);

	long (*unlocked_ioctl) (struct file *, unsigned int, unsigned long);

	long (*compat_ioctl) (struct file *, unsigned int, unsigned long);

	int (*mmap) (struct file *, struct vm_area_struct *);

};

locking rules:

	All except for ->poll_mask may block.

	All may block.

->llseek() locking has moved from llseek to the individual llseek

implementations.  If your fs is not using generic_file_llseek, you

the lease within the individual filesystem to record the result of the

operation

->poll_mask can be called with or without the waitqueue lock for the waitqueue

returned from ->get_poll_head.

--------------------------- dquot_operations -------------------------------

prototypes:

	int (*write_dquot) (struct dquot *);

	ssize_t (*write_iter) (struct kiocb *, struct iov_iter *);

	int (*iterate) (struct file *, struct dir_context *);

	__poll_t (*poll) (struct file *, struct poll_table_struct *);

	struct wait_queue_head * (*get_poll_head)(struct file *, __poll_t);

	__poll_t (*poll_mask) (struct file *, __poll_t);

	long (*unlocked_ioctl) (struct file *, unsigned int, unsigned long);

	long (*compat_ioctl) (struct file *, unsigned int, unsigned long);

	int (*mmap) (struct file *, struct vm_area_struct *);

	activity on this file and (optionally) go to sleep until there

	is activity. Called by the select(2) and poll(2) system calls

  get_poll_head: Returns the struct wait_queue_head that callers can

  wait on.  Callers need to check the returned events using ->poll_mask

  once woken.  Can return NULL to indicate polling is not supported,

  or any error code using the ERR_PTR convention to indicate that a

  grave error occured and ->poll_mask shall not be called.

  poll_mask: return the mask of EPOLL* values describing the file descriptor

  state.  Called either before going to sleep on the waitqueue returned by

  get_poll_head, or after it has been woken.  If ->get_poll_head and

  ->poll_mask are implemented ->poll does not need to be implement.

  unlocked_ioctl: called by the ioctl(2) system call.

  compat_ioctl: called by the ioctl(2) system call when 32 bit system calls

to use it. It should be placed at the top of the configuration, before any

other statement.

'#' Kconfig source file comment:

An unquoted '#' character anywhere in a source file line indicates

the beginning of a source file comment.  The remainder of that line

is a comment.

Kconfig hints

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