Merge tag 'docs-5.12' of git://git.lwn.net/linux

Pull documentation updates from Jonathan Corbet:
 "It has been a relatively quiet cycle in docsland.

   - As promised, the minimum Sphinx version to build the docs is now
     1.7, and we have dropped support for Python 2 entirely. That
     allowed the removal of a bunch of compatibility code.

   - A set of treewide warning fixups from Mauro that I applied after it
     became clear nobody else was going to deal with them.

   - The automarkup mechanism can now create cross-references from
     relative paths to RST files.

   - More translations, typo fixes, and warning fixes"

* tag 'docs-5.12' of git://git.lwn.net/linux: (75 commits)
  docs: kernel-hacking: be more civil
  docs: Remove the Microsoft rhetoric
  Documentation/admin-guide: kernel-parameters: Update nohlt section
  doc/admin-guide: fix spelling mistake: "perfomance" -> "performance"
  docs: Document cross-referencing using relative path
  docs: Enable usage of relative paths to docs on automarkup
  docs: thermal: fix spelling mistakes
  Documentation: admin-guide: Update kvm/xen config option
  docs: Make syscalls' helpers naming consistent
  coding-style.rst: Avoid comma statements
  Documentation: /proc/loadavg: add 3 more field descriptions
  Documentation/submitting-patches: Add blurb about backtraces in commit messages
  Docs: drop Python 2 support
  Move our minimum Sphinx version to 1.7
  Documentation: input: define ABS_PRESSURE/ABS_MT_PRESSURE resolution as grams
  scripts/kernel-doc: add internal hyperlink to DOC: sections
  Update Documentation/admin-guide/sysctl/fs.rst
  docs: Update DTB format references
  docs: zh_CN: add iio index.rst translation
  docs/zh_CN: add iio ep93xx_adc.rst translation
  ...

9 files changed, 63 insertions, 53 deletions

diff --git a/Documentation/admin-guide/README.rst b/Documentation/admin-guide/README.rst
index 261b7b4cca1f..35314b63008c 100644
--- a/Documentation/admin-guide/README.rst
+++ b/Documentation/admin-guide/README.rst
@@ -226,10 +226,11 @@ Configuring the kernel
                            all module options to built in (=y) options. You can
                            also preserve modules by LMC_KEEP.
 
-     "make kvmconfig"   Enable additional options for kvm guest kernel support.
+     "make kvm_guest.config"   Enable additional options for kvm guest kernel
+                               support.
 
-     "make xenconfig"   Enable additional options for xen dom0 guest kernel
-                        support.
+     "make xen.config"   Enable additional options for xen dom0 guest kernel
+                         support.
 
      "make tinyconfig"  Configure the tiniest possible kernel.
 
diff --git a/Documentation/admin-guide/cgroup-v1/memory.rst b/Documentation/admin-guide/cgroup-v1/memory.rst
index 52688ae34461..0936412e044e 100644
--- a/Documentation/admin-guide/cgroup-v1/memory.rst
+++ b/Documentation/admin-guide/cgroup-v1/memory.rst
@@ -963,21 +963,21 @@ References
 2. Singh, Balbir. Memory Controller (RSS Control),
    http://lwn.net/Articles/222762/
 3. Emelianov, Pavel. Resource controllers based on process cgroups
-   http://lkml.org/lkml/2007/3/6/198
+   https://lore.kernel.org/r/45ED7DEC.7010403@sw.ru
 4. Emelianov, Pavel. RSS controller based on process cgroups (v2)
-   http://lkml.org/lkml/2007/4/9/78
+   https://lore.kernel.org/r/461A3010.90403@sw.ru
 5. Emelianov, Pavel. RSS controller based on process cgroups (v3)
-   http://lkml.org/lkml/2007/5/30/244
+   https://lore.kernel.org/r/465D9739.8070209@openvz.org
 6. Menage, Paul. Control Groups v10, http://lwn.net/Articles/236032/
 7. Vaidyanathan, Srinivasan, Control Groups: Pagecache accounting and control
    subsystem (v3), http://lwn.net/Articles/235534/
 8. Singh, Balbir. RSS controller v2 test results (lmbench),
-   http://lkml.org/lkml/2007/5/17/232
+   https://lore.kernel.org/r/464C95D4.7070806@linux.vnet.ibm.com
 9. Singh, Balbir. RSS controller v2 AIM9 results
-   http://lkml.org/lkml/2007/5/18/1
+   https://lore.kernel.org/r/464D267A.50107@linux.vnet.ibm.com
 10. Singh, Balbir. Memory controller v6 test results,
-    http://lkml.org/lkml/2007/8/19/36
+    https://lore.kernel.org/r/20070819094658.654.84837.sendpatchset@balbir-laptop
 11. Singh, Balbir. Memory controller introduction (v6),
-    http://lkml.org/lkml/2007/8/17/69
+    https://lore.kernel.org/r/20070817084228.26003.12568.sendpatchset@balbir-laptop
 12. Corbet, Jonathan, Controlling memory use in cgroups,
     http://lwn.net/Articles/243795/
diff --git a/Documentation/admin-guide/cgroup-v2.rst b/Documentation/admin-guide/cgroup-v2.rst
index 1de8695c264b..c513eafaddea 100644
--- a/Documentation/admin-guide/cgroup-v2.rst
+++ b/Documentation/admin-guide/cgroup-v2.rst
@@ -1,3 +1,5 @@
+.. _cgroup-v2:
+
 ================
 Control Group v2
 ================
@@ -172,7 +174,6 @@ disabling controllers in v1 and make them always available in v2.
 cgroup v2 currently supports the following mount options.
 
   nsdelegate
-
 	Consider cgroup namespaces as delegation boundaries.  This
 	option is system wide and can only be set on mount or modified
 	through remount from the init namespace.  The mount option is
@@ -180,7 +181,6 @@ cgroup v2 currently supports the following mount options.
 	Delegation section for details.
 
   memory_localevents
-
         Only populate memory.events with data for the current cgroup,
         and not any subtrees. This is legacy behaviour, the default
         behaviour without this option is to include subtree counts.
@@ -189,7 +189,6 @@ cgroup v2 currently supports the following mount options.
         option is ignored on non-init namespace mounts.
 
   memory_recursiveprot
-
         Recursively apply memory.min and memory.low protection to
         entire subtrees, without requiring explicit downward
         propagation into leaf cgroups.  This allows protecting entire
@@ -786,7 +785,6 @@ Core Interface Files
 All cgroup core files are prefixed with "cgroup."
 
   cgroup.type
-
 	A read-write single value file which exists on non-root
 	cgroups.
 
@@ -954,6 +952,8 @@ All cgroup core files are prefixed with "cgroup."
 Controllers
 ===========
 
+.. _cgroup-v2-cpu:
+
 CPU
 ---
 
@@ -1259,9 +1259,9 @@ PAGE_SIZE multiple when read back.
 	can show up in the middle. Don't rely on items remaining in a
 	fixed position; use the keys to look up specific values!
 
-	If the entry has no per-node counter(or not show in the
-	mempry.numa_stat). We use 'npn'(non-per-node) as the tag
-	to indicate that it will not show in the mempry.numa_stat.
+	If the entry has no per-node counter (or not show in the
+	memory.numa_stat). We use 'npn' (non-per-node) as the tag
+	to indicate that it will not show in the memory.numa_stat.
 
 	  anon
 		Amount of memory used in anonymous mappings such as
@@ -1277,11 +1277,11 @@ PAGE_SIZE multiple when read back.
 	  pagetables
                 Amount of memory allocated for page tables.
 
-	  percpu(npn)
+	  percpu (npn)
 		Amount of memory used for storing per-cpu kernel
 		data structures.
 
-	  sock(npn)
+	  sock (npn)
 		Amount of memory used in network transmission buffers
 
 	  shmem
@@ -1329,7 +1329,7 @@ PAGE_SIZE multiple when read back.
 		Part of "slab" that cannot be reclaimed on memory
 		pressure.
 
-	  slab(npn)
+	  slab (npn)
 		Amount of memory used for storing in-kernel data
 		structures.
 
@@ -1357,39 +1357,39 @@ PAGE_SIZE multiple when read back.
 	  workingset_nodereclaim
 		Number of times a shadow node has been reclaimed
 
-	  pgfault(npn)
+	  pgfault (npn)
 		Total number of page faults incurred
 
-	  pgmajfault(npn)
+	  pgmajfault (npn)
 		Number of major page faults incurred
 
-	  pgrefill(npn)
+	  pgrefill (npn)
 		Amount of scanned pages (in an active LRU list)
 
-	  pgscan(npn)
+	  pgscan (npn)
 		Amount of scanned pages (in an inactive LRU list)
 
-	  pgsteal(npn)
+	  pgsteal (npn)
 		Amount of reclaimed pages
 
-	  pgactivate(npn)
+	  pgactivate (npn)
 		Amount of pages moved to the active LRU list
 
-	  pgdeactivate(npn)
+	  pgdeactivate (npn)
 		Amount of pages moved to the inactive LRU list
 
-	  pglazyfree(npn)
+	  pglazyfree (npn)
 		Amount of pages postponed to be freed under memory pressure
 
-	  pglazyfreed(npn)
+	  pglazyfreed (npn)
 		Amount of reclaimed lazyfree pages
 
-	  thp_fault_alloc(npn)
+	  thp_fault_alloc (npn)
 		Number of transparent hugepages which were allocated to satisfy
 		a page fault. This counter is not present when CONFIG_TRANSPARENT_HUGEPAGE
                 is not set.
 
-	  thp_collapse_alloc(npn)
+	  thp_collapse_alloc (npn)
 		Number of transparent hugepages which were allocated to allow
 		collapsing an existing range of pages. This counter is not
 		present when CONFIG_TRANSPARENT_HUGEPAGE is not set.
@@ -1558,7 +1558,7 @@ IO Interface Files
 	  8:0 rbytes=90430464 wbytes=299008000 rios=8950 wios=1252 dbytes=50331648 dios=3021
 
   io.cost.qos
-	A read-write nested-keyed file with exists only on the root
+	A read-write nested-keyed file which exists only on the root
 	cgroup.
 
 	This file configures the Quality of Service of the IO cost
@@ -1613,7 +1613,7 @@ IO Interface Files
 	automatic mode can be restored by setting "ctrl" to "auto".
 
   io.cost.model
-	A read-write nested-keyed file with exists only on the root
+	A read-write nested-keyed file which exists only on the root
 	cgroup.
 
 	This file configures the cost model of the IO cost model based
@@ -2000,10 +2000,12 @@ Cpuset Interface Files
 	cpuset-enabled cgroups.  This flag is owned by the parent cgroup
 	and is not delegatable.
 
-        It accepts only the following input values when written to.
+	It accepts only the following input values when written to.
 
-        "root"   - a partition root
-        "member" - a non-root member of a partition
+	  ========	================================
+	  "root"	a partition root
+	  "member"	a non-root member of a partition
+	  ========	================================
 
 	When set to be a partition root, the current cgroup is the
 	root of a new partition or scheduling domain that comprises
@@ -2044,9 +2046,11 @@ Cpuset Interface Files
 	root to change.  On read, the "cpuset.sched.partition" file
 	can show the following values.
 
-	"member"       Non-root member of a partition
-	"root"         Partition root
-	"root invalid" Invalid partition root
+	  ==============	==============================
+	  "member"		Non-root member of a partition
+	  "root"		Partition root
+	  "root invalid"	Invalid partition root
+	  ==============	==============================
 
 	It is a partition root if the first 2 partition root conditions
 	above are true and at least one CPU from "cpuset.cpus" is
@@ -2219,7 +2223,7 @@ Without cgroup namespace, the "/proc/$PID/cgroup" file shows the
 complete path of the cgroup of a process.  In a container setup where
 a set of cgroups and namespaces are intended to isolate processes the
 "/proc/$PID/cgroup" file may leak potential system level information
-to the isolated processes.  For Example::
+to the isolated processes.  For example::
 
   # cat /proc/self/cgroup
   0::/batchjobs/container_id1
diff --git a/Documentation/admin-guide/cpu-load.rst b/Documentation/admin-guide/cpu-load.rst
index f3ada90e9ca8..21a984337080 100644
--- a/Documentation/admin-guide/cpu-load.rst
+++ b/Documentation/admin-guide/cpu-load.rst
@@ -107,7 +107,7 @@ will lead to quite erratic information inside ``/proc/stat``::
 References
 ----------
 
-- http://lkml.org/lkml/2007/2/12/6
+- https://lore.kernel.org/r/loom.20070212T063225-663@post.gmane.org
 - Documentation/filesystems/proc.rst (1.8)
 
 
diff --git a/Documentation/admin-guide/kernel-parameters.rst b/Documentation/admin-guide/kernel-parameters.rst
index 682ab28b5c94..1132796a8d96 100644
--- a/Documentation/admin-guide/kernel-parameters.rst
+++ b/Documentation/admin-guide/kernel-parameters.rst
@@ -60,7 +60,7 @@ Note that for the special case of a range one can split the range into equal
 sized groups and for each group use some amount from the beginning of that
 group:
 
-	<cpu number>-cpu number>:<used size>/<group size>
+	<cpu number>-<cpu number>:<used size>/<group size>
 
 For example one can add to the command line following parameter:
 
diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index 4fc20f9af2fb..52f8233f8bb8 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -606,7 +606,7 @@
 			kernel/dma/contiguous.c
 
 	cma_pernuma=nn[MG]
-			[ARM64,KNL]
+			[ARM64,KNL,CMA]
 			Sets the size of kernel per-numa memory area for
 			contiguous memory allocations. A value of 0 disables
 			per-numa CMA altogether. And If this option is not
@@ -1525,12 +1525,12 @@
 	hpet_mmap=	[X86, HPET_MMAP] Allow userspace to mmap HPET
 			registers.  Default set by CONFIG_HPET_MMAP_DEFAULT.
 
-	hugetlb_cma=	[HW] The size of a cma area used for allocation
+	hugetlb_cma=	[HW,CMA] The size of a CMA area used for allocation
 			of gigantic hugepages.
 			Format: nn[KMGTPE]
 
-			Reserve a cma area of given size and allocate gigantic
-			hugepages using the cma allocator. If enabled, the
+			Reserve a CMA area of given size and allocate gigantic
+			hugepages using the CMA allocator. If enabled, the
 			boot-time allocation of gigantic hugepages is skipped.
 
 	hugepages=	[HW] Number of HugeTLB pages to allocate at boot.
@@ -3273,9 +3273,14 @@
 			parameter, xsave area per process might occupy more
 			memory on xsaves enabled systems.
 
-	nohlt		[BUGS=ARM,SH] Tells the kernel that the sleep(SH) or
-			wfi(ARM) instruction doesn't work correctly and not to
-			use it. This is also useful when using JTAG debugger.
+	nohlt		[ARM,ARM64,MICROBLAZE,SH] Forces the kernel to busy wait
+			in do_idle() and not use the arch_cpu_idle()
+			implementation; requires CONFIG_GENERIC_IDLE_POLL_SETUP
+			to be effective. This is useful on platforms where the
+			sleep(SH) or wfi(ARM,ARM64) instructions do not work
+			correctly or when doing power measurements to evalute
+			the impact of the sleep instructions. This is also
+			useful when using JTAG debugger.
 
 	no_file_caps	Tells the kernel not to honor file capabilities.  The
 			only way then for a file to be executed with privilege
diff --git a/Documentation/admin-guide/kernel-per-CPU-kthreads.rst b/Documentation/admin-guide/kernel-per-CPU-kthreads.rst
index dc36aeb65d0a..531f689311f2 100644
--- a/Documentation/admin-guide/kernel-per-CPU-kthreads.rst
+++ b/Documentation/admin-guide/kernel-per-CPU-kthreads.rst
@@ -273,7 +273,7 @@ To reduce its OS jitter, do any of the following:
 		However, there is an RFC patch from Christoph Lameter
 		(based on an earlier one from Gilad Ben-Yossef) that
 		reduces or even eliminates vmstat overhead for some
-		workloads at https://lkml.org/lkml/2013/9/4/379.
+		workloads at https://lore.kernel.org/r/00000140e9dfd6bd-40db3d4f-c1be-434f-8132-7820f81bb586-000000@email.amazonses.com.
 	e.	If running on high-end powerpc servers, build with
 		CONFIG_PPC_RTAS_DAEMON=n.  This prevents the RTAS
 		daemon from running on each CPU every second or so.
diff --git a/Documentation/admin-guide/perf-security.rst b/Documentation/admin-guide/perf-security.rst
index 904e4eb37f99..34aa334320ca 100644
--- a/Documentation/admin-guide/perf-security.rst
+++ b/Documentation/admin-guide/perf-security.rst
@@ -72,7 +72,7 @@ monitoring and observability operations, thus, bypass *scope* permissions
 checks in the kernel. CAP_PERFMON implements the principle of least
 privilege [13]_ (POSIX 1003.1e: 2.2.2.39) for performance monitoring and
 observability operations in the kernel and provides a secure approach to
-perfomance monitoring and observability in the system.
+performance monitoring and observability in the system.
 
 For backward compatibility reasons the access to perf_events monitoring and
 observability operations is also open for CAP_SYS_ADMIN privileged
diff --git a/Documentation/admin-guide/sysctl/fs.rst b/Documentation/admin-guide/sysctl/fs.rst
index f48277a0a850..2a501c9ddc55 100644
--- a/Documentation/admin-guide/sysctl/fs.rst
+++ b/Documentation/admin-guide/sysctl/fs.rst
@@ -380,5 +380,5 @@ This configuration option sets the maximum number of "watches" that are
 allowed for each user.
 Each "watch" costs roughly 90 bytes on a 32bit kernel, and roughly 160 bytes
 on a 64bit one.
-The current default value for  max_user_watches  is the 1/32 of the available
-low memory, divided for the "watch" cost in bytes.
+The current default value for  max_user_watches  is the 1/25 (4%) of the
+available low memory, divided for the "watch" cost in bytes.