[PATCH] Documentation: process: Describe kernel version prefix for third option

[Bagas Sanjaya <bagasdotme@gmail.com>]

The current wording on third option of stable kernel submission doesn't
mention how to specify desired kernel version. Submitters reading the
documentation could simply send multiple backported patches of the same
upstream commit without any kernel version information, leaving stable
maintainers and reviewers hard time to figure out the correct kernel
version to be applied.

Describe the subject prefix for specifying kernel version for the case
above.

Cc: stable@vger.kernel.org
Signed-off-by: Bagas Sanjaya <bagasdotme@gmail.com>
---
 This patch is sent as response to [1].

 [1]: https://lore.kernel.org/stable/20221101074351.GA8310@amd/

 Documentation/process/stable-kernel-rules.rst | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/Documentation/process/stable-kernel-rules.rst b/Documentation/process/stable-kernel-rules.rst
index 2fd8aa593a2851..409ae73c1ffcd1 100644
--- a/Documentation/process/stable-kernel-rules.rst
+++ b/Documentation/process/stable-kernel-rules.rst
@@ -77,7 +77,9 @@ Option 3
 Send the patch, after verifying that it follows the above rules, to
 stable@vger.kernel.org.  You must note the upstream commit ID in the
 changelog of your submission, as well as the kernel version you wish
-it to be applied to.
+it to be applied to by adding desired kernel version number to the
+patch subject prefix. For example, patches targeting 5.15 kernel should
+have ``[PATCH 5.15]`` prefix.
 
 :ref:`option_1` is **strongly** preferred, is the easiest and most common.
 :ref:`option_2` and :ref:`option_3` are more useful if the patch isn't deemed

base-commit: 30a0b95b1335e12efef89dd78518ed3e4a71a763
-- 
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