[PATCH 2/2] docs: stable-kernel-rules: remind reader about DCO

[Shung-Hsi Yu]

When sending patch authored by someone else to stable, it is quite easy for
the sender to forget adding the Developer's Certification of Origin (DCO,
i.e. Signed-off-by). Mention DCO explicilty so senders are less likely to
forget to do so and cause another round-trip.

Add a label in submitting-patches.rst so we can directly link to the DCO
section.

Link: https://lore.kernel.org/stable/2024051500-underage-unfixed-5d28@gregkh/
Signed-off-by: Shung-Hsi Yu <shung-hsi.yu@xxxxxxxx>
---
 Documentation/process/stable-kernel-rules.rst | 4 ++++
 Documentation/process/submitting-patches.rst  | 1 +
 2 files changed, 5 insertions(+)

diff --git a/Documentation/process/stable-kernel-rules.rst b/Documentation/process/stable-kernel-rules.rst
index daa542988095..a8fecc5f681c 100644
--- a/Documentation/process/stable-kernel-rules.rst
+++ b/Documentation/process/stable-kernel-rules.rst
@@ -168,6 +168,10 @@ If the submitted patch deviates from the original upstream patch (for example
 because it had to be adjusted for the older API), this must be very clearly
 documented and justified in the patch description.
 
+Be sure to also include a :ref:`Developer's Certificate of Origin
+<sign_your_work>` (i.e. ``Signed-off-by``) when sending patches that you did
+not author yourself.
+
 
 Following the submission
 ------------------------
diff --git a/Documentation/process/submitting-patches.rst b/Documentation/process/submitting-patches.rst
index 66029999b587..98f1c8d8b429 100644
--- a/Documentation/process/submitting-patches.rst
+++ b/Documentation/process/submitting-patches.rst
@@ -394,6 +394,7 @@ e-mail discussions.
 
 ``git send-email`` will do this for you automatically.
 
+.. _sign_your_work:
 
 Sign your work - the Developer's Certificate of Origin
 ------------------------------------------------------
-- 
2.45.1