Merge tag 'docs-5.9' of git://git.lwn.net/linux

Pull documentation updates from Jonathan Corbet:
 "It's been a busy cycle for documentation - hopefully the busiest for a
  while to come. Changes include:

   - Some new Chinese translations

   - Progress on the battle against double words words and non-HTTPS
     URLs

   - Some block-mq documentation

   - More RST conversions from Mauro. At this point, that task is
     essentially complete, so we shouldn't see this kind of churn again
     for a while. Unless we decide to switch to asciidoc or
     something...:)

   - Lots of typo fixes, warning fixes, and more"

* tag 'docs-5.9' of git://git.lwn.net/linux: (195 commits)
  scripts/kernel-doc: optionally treat warnings as errors
  docs: ia64: correct typo
  mailmap: add entry for <alobakin@marvell.com>
  doc/zh_CN: add cpu-load Chinese version
  Documentation/admin-guide: tainted-kernels: fix spelling mistake
  MAINTAINERS: adjust kprobes.rst entry to new location
  devices.txt: document rfkill allocation
  PCI: correct flag name
  docs: filesystems: vfs: correct flag name
  docs: filesystems: vfs: correct sync_mode flag names
  docs: path-lookup: markup fixes for emphasis
  docs: path-lookup: more markup fixes
  docs: path-lookup: fix HTML entity mojibake
  CREDITS: Replace HTTP links with HTTPS ones
  docs: process: Add an example for creating a fixes tag
  doc/zh_CN: add Chinese translation prefer section
  doc/zh_CN: add clearing-warn-once Chinese version
  doc/zh_CN: add admin-guide index
  doc:it_IT: process: coding-style.rst: Correct __maybe_unused compiler label
  futex: MAINTAINERS: Re-add selftests directory
  ...

Documentation/admin-guide/sysctl/kernel.rst

@@ -235,7 +235,7 @@ This toggle indicates whether unprivileged users are prevented
 from using ``dmesg(8)`` to view messages from the kernel's log
 buffer.
 When ``dmesg_restrict`` is set to 0 there are no restrictions.
-When ``dmesg_restrict`` is set set to 1, users must have
+When ``dmesg_restrict`` is set to 1, users must have
 ``CAP_SYSLOG`` to use ``dmesg(8)``.
 
 The kernel config option ``CONFIG_SECURITY_DMESG_RESTRICT`` sets the
@@ -335,8 +335,8 @@ Path for the hotplug policy agent.
 Default value is "``/sbin/hotplug``".
 
 
-hung_task_all_cpu_backtrace:
-================
+hung_task_all_cpu_backtrace
+===========================
 
 If this option is set, the kernel will send an NMI to all CPUs to dump
 their backtraces when a hung task is detected. This file shows up if
@@ -646,8 +646,8 @@ rate for each task.
 scanned for a given scan.
 
 
-oops_all_cpu_backtrace:
-================
+oops_all_cpu_backtrace
+======================
 
 If this option is set, the kernel will send an NMI to all CPUs to dump
 their backtraces when an oops event occurs. It should be used as a last
@@ -996,6 +996,38 @@ pty
 See Documentation/filesystems/devpts.rst.
 
 
+random
+======
+
+This is a directory, with the following entries:
+
+* ``boot_id``: a UUID generated the first time this is retrieved, and
+  unvarying after that;
+
+* ``entropy_avail``: the pool's entropy count, in bits;
+
+* ``poolsize``: the entropy pool size, in bits;
+
+* ``urandom_min_reseed_secs``: obsolete (used to determine the minimum
+  number of seconds between urandom pool reseeding).
+
+* ``uuid``: a UUID generated every time this is retrieved (this can
+  thus be used to generate UUIDs at will);
+
+* ``write_wakeup_threshold``: when the entropy count drops below this
+  (as a number of bits), processes waiting to write to ``/dev/random``
+  are woken up.
+
+If ``drivers/char/random.c`` is built with ``ADD_INTERRUPT_BENCH``
+defined, these additional entries are present:
+
+* ``add_interrupt_avg_cycles``: the average number of cycles between
+  interrupts used to feed the pool;
+
+* ``add_interrupt_avg_deviation``: the standard deviation seen on the
+  number of cycles between interrupts used to feed the pool.
+
+
 randomize_va_space
 ==================