linux-kernel - [PATCH] Documentation: describe how to apply incremental stable patches

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Date:   Mon,  7 Mar 2022 13:33:41 +0700
From:   Bagas Sanjaya <bagasdotme@...il.com>
To:     linux-doc@...r.kernel.org
Cc:     Bagas Sanjaya <bagasdotme@...il.com>,
        Jonathan Corbet <corbet@....net>,
        SeongJae Park <sjpark@...zon.de>, linux-kernel@...r.kernel.org
Subject: [PATCH] Documentation: describe how to apply incremental stable patches

The applying patches document
(Documentation/process/applying-patches.rst) mentions incremental stable
patches, but there is no example of how to apply them. Describe the
process.

While at it, remove note about incremental patches and move the external
link of 5.x.y incremental patches to "Where can I download patches?"
section.

Cc: Jonathan Corbet <corbet@....net>
Cc: SeongJae Park <sjpark@...zon.de>
Cc: linux-kernel@...r.kernel.org
Signed-off-by: Bagas Sanjaya <bagasdotme@...il.com>
---
 Documentation/process/applying-patches.rst | 28 ++++++++++++++++++----
 1 file changed, 23 insertions(+), 5 deletions(-)

diff --git a/Documentation/process/applying-patches.rst b/Documentation/process/applying-patches.rst
index c2121c1e55d..c269f5e1a0a 100644
--- a/Documentation/process/applying-patches.rst
+++ b/Documentation/process/applying-patches.rst
@@ -249,6 +249,10 @@ The 5.x.y (-stable) and 5.x patches live at
 
 	https://www.kernel.org/pub/linux/kernel/v5.x/
 
+The 5.x.y incremental patches live at
+
+	https://www.kernel.org/pub/linux/kernel/v5.x/incr/
+
 The -rc patches are not stored on the webserver but are generated on
 demand from git tags such as
 
@@ -308,12 +312,11 @@ versions.
 If no 5.x.y kernel is available, then the highest numbered 5.x kernel is
 the current stable kernel.
 
-.. note::
+The -stable team provides normal as well as incremental patches. Below is
+how to apply these patches.
 
- The -stable team usually do make incremental patches available as well
- as patches against the latest mainline release, but I only cover the
- non-incremental ones below. The incremental ones can be found at
- https://www.kernel.org/pub/linux/kernel/v5.x/incr/
+Normal patches
+~~~~~~~~~~~~~~
 
 These patches are not incremental, meaning that for example the 5.7.3
 patch does not apply on top of the 5.7.2 kernel source, but rather on top
@@ -331,6 +334,21 @@ Here's a small example::
 	$ cd ..
 	$ mv linux-5.7.2 linux-5.7.3	# rename the kernel source dir
 
+Incremental patches
+~~~~~~~~~~~~~~~~~~~
+
+Incremental patches are different: instead of being applied on top
+of base 5.x kernel, they are applied on top of previous stable kernel
+(5.x.y-1).
+
+Here's the example to apply these::
+
+	$ cd ~/linux-5.7.2		# change to the kernel source dir
+	$ patch -p1 < ../patch-5.7.2-3	# apply the new 5.7.3 patch
+	$ cd ..
+	$ mv linux-5.7.2 linux-5.7.3	# rename the kernel source dir
+
+
 The -rc kernels
 ===============
 

base-commit: ffb217a13a2eaf6d5bd974fc83036a53ca69f1e2
-- 
An old man doll... just what I always wanted! - Clara