[PATCH] docs/mm: Physical Memory: remove useless markup

[Mike Rapoport <rppt@kernel.org>]

From: "Mike Rapoport (IBM)" <rppt@kernel.org>

Jon says:

  > +See also :ref:`Page Reclaim <page_reclaim>`.

  Can also just be "See also Documentation/mm/page_reclaim.rst".  The
  right things will happen in the HTML output, readers of the plain-text
  will know immediately where to go, and we don't have to add the label
  clutter.

Remove reference markup and unnecessary labes and use plain file names.

Fixes: 5d8c5e430a63 ("docs/mm: Physical Memory: add structure, introduction and nodes description")
Suggested-by: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Mike Rapoport (IBM) <rppt@kernel.org>
---
 Documentation/core-api/dma-api.rst   | 2 --
 Documentation/mm/page_reclaim.rst    | 2 --
 Documentation/mm/physical_memory.rst | 6 +++---
 3 files changed, 3 insertions(+), 7 deletions(-)

diff --git a/Documentation/core-api/dma-api.rst b/Documentation/core-api/dma-api.rst
index c847a5b0a0d3..829f20a193ca 100644
--- a/Documentation/core-api/dma-api.rst
+++ b/Documentation/core-api/dma-api.rst
@@ -1,5 +1,3 @@
-.. _dma_api:
-
 ============================================
 Dynamic DMA mapping using the generic device
 ============================================
diff --git a/Documentation/mm/page_reclaim.rst b/Documentation/mm/page_reclaim.rst
index 3fccde066436..50a30b7f8ac3 100644
--- a/Documentation/mm/page_reclaim.rst
+++ b/Documentation/mm/page_reclaim.rst
@@ -1,7 +1,5 @@
 .. SPDX-License-Identifier: GPL-2.0
 
-.. _page_reclaim:
-
 ============
 Page Reclaim
 ============
diff --git a/Documentation/mm/physical_memory.rst b/Documentation/mm/physical_memory.rst
index d24220d62475..120d54ba6ea7 100644
--- a/Documentation/mm/physical_memory.rst
+++ b/Documentation/mm/physical_memory.rst
@@ -39,8 +39,8 @@ one of the types described below.
 * ``ZONE_DMA`` and ``ZONE_DMA32`` historically represented memory suitable for
   DMA by peripheral devices that cannot access all of the addressable
   memory. For many years there are better more and robust interfaces to get
-  memory with DMA specific requirements (:ref:`DMA API <dma_api>`), but
-  ``ZONE_DMA`` and ``ZONE_DMA32`` still represent memory ranges that have
+  memory with DMA specific requirements (Documentation/core-api/dma-api.rst),
+  but ``ZONE_DMA`` and ``ZONE_DMA32`` still represent memory ranges that have
   restrictions on how they can be accessed.
   Depending on the architecture, either of these zone types or even they both
   can be disabled at build time using ``CONFIG_ZONE_DMA`` and
@@ -252,7 +252,7 @@ General
 Reclaim control
 ~~~~~~~~~~~~~~~
 
-See also :ref:`Page Reclaim <page_reclaim>`.
+See also Documentation/mm/page_reclaim.rst.
 
 ``kswapd``
   Per-node instance of kswapd kernel thread.
-- 
2.35.1