[PATCH v2 1/2] docs: stable-kernel-rules: provide example of specifing target series

[Shung-Hsi Yu <shung-hsi.yu@suse.com>]

Provide a concrete example of how to specify what stable series should be
targeted for change inclusion. Looking around on the stable mailing list this
seems like a common practice already, so let mention that in the documentation
as well (but worded so it is not interpreted as the only way to do so).

Reviewed-by: Paul Barker <paul.barker.ct@bp.renesas.com>
Signed-off-by: Shung-Hsi Yu <shung-hsi.yu@suse.com>
---
Change from v1: 
- "asks that the patch to be included in..." is edit to "asks that the
  patch is included in..." for better wording (Paul)
---
 Documentation/process/stable-kernel-rules.rst | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/Documentation/process/stable-kernel-rules.rst b/Documentation/process/stable-kernel-rules.rst
index edf90bbe30f4..d22aa2280f6e 100644
--- a/Documentation/process/stable-kernel-rules.rst
+++ b/Documentation/process/stable-kernel-rules.rst
@@ -57,10 +57,13 @@ options for cases where a mainlined patch needs adjustments to apply in older
 series (for example due to API changes).
 
 When using option 2 or 3 you can ask for your change to be included in specific
-stable series. When doing so, ensure the fix or an equivalent is applicable,
-submitted, or already present in all newer stable trees still supported. This is
-meant to prevent regressions that users might later encounter on updating, if
-e.g. a fix merged for 5.19-rc1 would be backported to 5.10.y, but not to 5.15.y.
+stable series, one way to do so is by specifying the target series in the
+subject prefix (e.g. '[PATCH stable 5.15 5.10]' asks that the patch is
+included in both 5.10.y and 5.15.y). When doing so, ensure the fix or an
+equivalent is applicable, submitted, or already present in all newer stable
+trees still supported. This is meant to prevent regressions that users might
+later encounter on updating, if e.g. a fix merged for 5.19-rc1 would be
+backported to 5.10.y, but not to 5.15.y.
 
 .. _option_1:
 
-- 
2.45.2