docs: sh: convert register-banks.txt to ReST

- Add a SPDX header;
- Adjust document title to follow ReST style;
- Add blank lines to make ReST markup happy
- Add it to sh/index.rst.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Link: https://lore.kernel.org/r/adf117cf1edd7f43cb839ff2800f4315dfbcce13.1592203650.git.mchehab+huawei@kernel.org
Signed-off-by: Jonathan Corbet <corbet@lwn.net>

diff --git a/Documentation/sh/index.rst b/Documentation/sh/index.rst
index 967acad..b5933fd 100644 (file)
--- a/Documentation/sh/index.rst
+++ b/Documentation/sh/index.rst
@@ -8,6 +8,7 @@ SuperH Interfaces Guide
     :maxdepth: 1
 
     new-machine
+    register-banks
 
 Memory Management
 =================

diff --git a/Documentation/sh/register-banks.txt b/Documentation/sh/register-banks.rst
similarity index 88%
rename from Documentation/sh/register-banks.txt
rename to Documentation/sh/register-banks.rst
index a6719f2..2bef5c8 100644 (file)
--- a/Documentation/sh/register-banks.txt
+++ b/Documentation/sh/register-banks.rst
@@ -1,5 +1,8 @@
-       Notes on register bank usage in the kernel
-       ==========================================
+.. SPDX-License-Identifier: GPL-2.0
+
+==========================================
+Notes on register bank usage in the kernel
+==========================================
 
 Introduction
 ------------
@@ -23,11 +26,15 @@ Presently the kernel uses several of these registers.
 
        - r0_bank, r1_bank (referenced as k0 and k1, used for scratch
          registers when doing exception handling).
+
        - r2_bank (used to track the EXPEVT/INTEVT code)
+
                - Used by do_IRQ() and friends for doing irq mapping based off
                  of the interrupt exception vector jump table offset
+
        - r6_bank (global interrupt mask)
+
                - The SR.IMASK interrupt handler makes use of this to set the
                  interrupt priority level (used by local_irq_enable())
-       - r7_bank (current)
 
+       - r7_bank (current)

diff --git a/arch/sh/Kconfig.cpu b/arch/sh/Kconfig.cpu
index 97ca35f..fff419f 100644 (file)
--- a/arch/sh/Kconfig.cpu
+++ b/arch/sh/Kconfig.cpu
@@ -85,7 +85,7 @@ config CPU_HAS_SR_RB
          that are lacking this bit must have another method in place for
          accomplishing what is taken care of by the banked registers.
 
-         See <file:Documentation/sh/register-banks.txt> for further
+         See <file:Documentation/sh/register-banks.rst> for further
          information on SR.RB and register banking in the kernel in general.
 
 config CPU_HAS_PTEAEX