Merge tag 'docs-4.20' of git://git.lwn.net/linux

Pull documentation updates from Jonathan Corbet:
 "This is a fairly typical cycle for documentation. There's some welcome
  readability improvements for the formatted output, some LICENSES
  updates including the addition of the ISC license, the removal of the
  unloved and unmaintained 00-INDEX files, the deprecated APIs document
  from Kees, more MM docs from Mike Rapoport, and the usual pile of typo
  fixes and corrections"

* tag 'docs-4.20' of git://git.lwn.net/linux: (41 commits)
  docs: Fix typos in histogram.rst
  docs: Introduce deprecated APIs list
  kernel-doc: fix declaration type determination
  doc: fix a typo in adding-syscalls.rst
  docs/admin-guide: memory-hotplug: remove table of contents
  doc: printk-formats: Remove bogus kobject references for device nodes
  Documentation: preempt-locking: Use better example
  dm flakey: Document "error_writes" feature
  docs/completion.txt: Fix a couple of punctuation nits
  LICENSES: Add ISC license text
  LICENSES: Add note to CDDL-1.0 license that it should not be used
  docs/core-api: memory-hotplug: add some details about locking internals
  docs/core-api: rename memory-hotplug-notifier to memory-hotplug
  docs: improve readability for people with poorer eyesight
  yama: clarify ptrace_scope=2 in Yama documentation
  docs/vm: split memory hotplug notifier description to Documentation/core-api
  docs: move memory hotplug description into admin-guide/mm
  doc: Fix acronym "FEKEK" in ecryptfs
  docs: fix some broken documentation references
  iommu: Fix passthrough option documentation
  ...

4 files changed, 2 insertions, 181 deletions

diff --git a/Documentation/filesystems/00-INDEX b/Documentation/filesystems/00-INDEX
deleted file mode 100644
index 0937bade1099..000000000000
--- a/Documentation/filesystems/00-INDEX
+++ /dev/null
@@ -1,153 +0,0 @@
-00-INDEX
-	- this file (info on some of the filesystems supported by linux).
-Locking
-	- info on locking rules as they pertain to Linux VFS.
-9p.txt
-	- 9p (v9fs) is an implementation of the Plan 9 remote fs protocol.
-adfs.txt
-	- info and mount options for the Acorn Advanced Disc Filing System.
-afs.txt
-	- info and examples for the distributed AFS (Andrew File System) fs.
-affs.txt
-	- info and mount options for the Amiga Fast File System.
-autofs-mount-control.txt
-	- info on device control operations for autofs module.
-automount-support.txt
-	- information about filesystem automount support.
-befs.txt
-	- information about the BeOS filesystem for Linux.
-bfs.txt
-	- info for the SCO UnixWare Boot Filesystem (BFS).
-btrfs.txt
-	- info for the BTRFS filesystem.
-caching/
-	- directory containing filesystem cache documentation.
-ceph.txt
-	- info for the Ceph Distributed File System.
-cifs/
-	- directory containing CIFS filesystem documentation and example code.
-coda.txt
-	- description of the CODA filesystem.
-configfs/
-	- directory containing configfs documentation and example code.
-cramfs.txt
-	- info on the cram filesystem for small storage (ROMs etc).
-dax.txt
-	- info on avoiding the page cache for files stored on CPU-addressable
-	  storage devices.
-debugfs.txt
-	- info on the debugfs filesystem.
-devpts.txt
-	- info on the devpts filesystem.
-directory-locking
-	- info about the locking scheme used for directory operations.
-dlmfs.txt
-	- info on the userspace interface to the OCFS2 DLM.
-dnotify.txt
-	- info about directory notification in Linux.
-dnotify_test.c
-	- example program for dnotify.
-ecryptfs.txt
-	- docs on eCryptfs: stacked cryptographic filesystem for Linux.
-efivarfs.txt
-	- info for the efivarfs filesystem.
-exofs.txt
-	- info, usage, mount options, design about EXOFS.
-ext2.txt
-	- info, mount options and specifications for the Ext2 filesystem.
-ext3.txt
-	- info, mount options and specifications for the Ext3 filesystem.
-ext4.txt
-	- info, mount options and specifications for the Ext4 filesystem.
-f2fs.txt
-	- info and mount options for the F2FS filesystem.
-fiemap.txt
-	- info on fiemap ioctl.
-files.txt
-	- info on file management in the Linux kernel.
-fuse.txt
-	- info on the Filesystem in User SpacE including mount options.
-gfs2-glocks.txt
-	- info on the Global File System 2 - Glock internal locking rules.
-gfs2-uevents.txt
-	- info on the Global File System 2 - uevents.
-gfs2.txt
-	- info on the Global File System 2.
-hfs.txt
-	- info on the Macintosh HFS Filesystem for Linux.
-hfsplus.txt
-	- info on the Macintosh HFSPlus Filesystem for Linux.
-hpfs.txt
-	- info and mount options for the OS/2 HPFS.
-inotify.txt
-	- info on the powerful yet simple file change notification system.
-isofs.txt
-	- info and mount options for the ISO 9660 (CDROM) filesystem.
-jfs.txt
-	- info and mount options for the JFS filesystem.
-locks.txt
-	- info on file locking implementations, flock() vs. fcntl(), etc.
-mandatory-locking.txt
-	- info on the Linux implementation of Sys V mandatory file locking.
-nfs/
-	- nfs-related documentation.
-nilfs2.txt
-	- info and mount options for the NILFS2 filesystem.
-ntfs.txt
-	- info and mount options for the NTFS filesystem (Windows NT).
-ocfs2.txt
-	- info and mount options for the OCFS2 clustered filesystem.
-omfs.txt
-	- info on the Optimized MPEG FileSystem.
-path-lookup.txt
-	- info on path walking and name lookup locking.
-pohmelfs/
-	- directory containing pohmelfs filesystem documentation.
-porting
-	- various information on filesystem porting.
-proc.txt
-	- info on Linux's /proc filesystem.
-qnx6.txt
-	- info on the QNX6 filesystem.
-quota.txt
-	- info on Quota subsystem.
-ramfs-rootfs-initramfs.txt
-	- info on the 'in memory' filesystems ramfs, rootfs and initramfs.
-relay.txt
-	- info on relay, for efficient streaming from kernel to user space.
-romfs.txt
-	- description of the ROMFS filesystem.
-seq_file.txt
-	- how to use the seq_file API.
-sharedsubtree.txt
-	- a description of shared subtrees for namespaces.
-spufs.txt
-	- info and mount options for the SPU filesystem used on Cell.
-squashfs.txt
-	- info on the squashfs filesystem.
-sysfs-pci.txt
-	- info on accessing PCI device resources through sysfs.
-sysfs-tagging.txt
-	- info on sysfs tagging to avoid duplicates.
-sysfs.txt
-	- info on sysfs, a ram-based filesystem for exporting kernel objects.
-sysv-fs.txt
-	- info on the SystemV/V7/Xenix/Coherent filesystem.
-tmpfs.txt
-	- info on tmpfs, a filesystem that holds all files in virtual memory.
-ubifs.txt
-	- info on the Unsorted Block Images FileSystem.
-udf.txt
-	- info and mount options for the UDF filesystem.
-ufs.txt
-	- info on the ufs filesystem.
-vfat.txt
-	- info on using the VFAT filesystem used in Windows NT and Windows 95.
-vfs.txt
-	- overview of the Virtual File System.
-xfs-delayed-logging-design.txt
-	- info on the XFS Delayed Logging Design.
-xfs-self-describing-metadata.txt
-	- info on XFS Self Describing Metadata.
-xfs.txt
-	- info and mount options for the XFS filesystem.
diff --git a/Documentation/filesystems/dax.txt b/Documentation/filesystems/dax.txt
index 70cb68bed2e8..bc393e0a22b8 100644
--- a/Documentation/filesystems/dax.txt
+++ b/Documentation/filesystems/dax.txt
@@ -75,7 +75,7 @@ exposure of uninitialized data through mmap.
 
 These filesystems may be used for inspiration:
 - ext2: see Documentation/filesystems/ext2.txt
-- ext4: see Documentation/filesystems/ext4.txt
+- ext4: see Documentation/filesystems/ext4/ext4.rst
 - xfs:  see Documentation/filesystems/xfs.txt
 
 
diff --git a/Documentation/filesystems/ext2.txt b/Documentation/filesystems/ext2.txt
index 81c0becab225..a45c9fc0747b 100644
--- a/Documentation/filesystems/ext2.txt
+++ b/Documentation/filesystems/ext2.txt
@@ -358,7 +358,7 @@ and are copied into the filesystem.  If a transaction is incomplete at
 the time of the crash, then there is no guarantee of consistency for
 the blocks in that transaction so they are discarded (which means any
 filesystem changes they represent are also lost).
-Check Documentation/filesystems/ext4.txt if you want to read more about
+Check Documentation/filesystems/ext4/ext4.rst if you want to read more about
 ext4 and journaling.
 
 References
diff --git a/Documentation/filesystems/nfs/00-INDEX b/Documentation/filesystems/nfs/00-INDEX
deleted file mode 100644
index 53f3b596ac0d..000000000000
--- a/Documentation/filesystems/nfs/00-INDEX
+++ /dev/null
@@ -1,26 +0,0 @@
-00-INDEX
-	- this file (nfs-related documentation).
-Exporting
-	- explanation of how to make filesystems exportable.
-fault_injection.txt
-	- information for using fault injection on the server
-knfsd-stats.txt
-	- statistics which the NFS server makes available to user space.
-nfs.txt
-	- nfs client, and DNS resolution for fs_locations.
-nfs41-server.txt
-	- info on the Linux server implementation of NFSv4 minor version 1.
-nfs-rdma.txt
-	- how to install and setup the Linux NFS/RDMA client and server software
-nfsd-admin-interfaces.txt
-	- Administrative interfaces for nfsd.
-nfsroot.txt
-	- short guide on setting up a diskless box with NFS root filesystem.
-pnfs.txt
-	- short explanation of some of the internals of the pnfs client code
-rpc-cache.txt
-	- introduction to the caching mechanisms in the sunrpc layer.
-idmapper.txt
-	- information for configuring request-keys to be used by idmapper
-rpc-server-gss.txt
-	- Information on GSS authentication support in the NFS Server