docs: sysctl: convert to ReST

Rename the /proc/sys/ documentation files to ReST, using the
README file as a template for an index.rst, adding the other
files there via TOC markup.

Despite being written on different times with different
styles, try to make them somewhat coherent with a similar
look and feel, ensuring that they'll look nice as both
raw text file and as via the html output produced by the
Sphinx build system.

At its new index.rst, let's add a :orphan: while this is not linked to
the main index.rst file, in order to avoid build warnings.

Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/Documentation/vm/unevictable-lru.rst b/Documentation/vm/unevictable-lru.rst
index c6d94118fbcc..8ba656f37cd8 100644
--- a/Documentation/vm/unevictable-lru.rst
+++ b/Documentation/vm/unevictable-lru.rst
@@ -439,7 +439,7 @@ Compacting MLOCKED Pages
 
 The unevictable LRU can be scanned for compactable regions and the default
 behavior is to do so.  /proc/sys/vm/compact_unevictable_allowed controls
-this behavior (see Documentation/sysctl/vm.txt).  Once scanning of the
+this behavior (see Documentation/sysctl/vm.rst).  Once scanning of the
 unevictable LRU is enabled, the work of compaction is mostly handled by
 the page migration code and the same work flow as described in MIGRATING
 MLOCKED PAGES will apply.