docs: stable-kernel-rules: mention that regressions must be prevented
Document that changes intended for a specific stable series have to be in all newer series still maintained, as otherwise users would run into regressions. CC: Greg KH <gregkh@linuxfoundation.org> CC: Sasha Levin <sashal@kernel.org> CC: Jonathan Corbet <corbet@lwn.net> Signed-off-by: Thorsten Leemhuis <linux@leemhuis.info> Link: https://lore.kernel.org/r/ddb5cb0d6b7aa4ef31642cd9657a0fb53d79cddb.1691219455.git.linux@leemhuis.info Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -56,6 +56,12 @@ at the time of submission. :ref:`option_3` is an alternative to the two earlier
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options for cases where a mainlined patch needs adjustments to apply in older
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series (for example due to API changes).
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When using option 2 or 3 you can ask for your change to be included in specific
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stable series. When doing so, ensure the fix or an equivalent is applicable,
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submitted, or already present in all newer stable trees still supported. This is
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meant to prevent regressions that users might later encounter on updating, if
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e.g. a fix merged for 5.19-rc1 would be backported to 5.10.y, but not to 5.15.y.
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.. _option_1:
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Option 1
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@ -133,7 +139,7 @@ Option 2
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If the patch already has been merged to mainline, send an email to
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stable@vger.kernel.org containing the subject of the patch, the commit ID,
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why you think it should be applied, and what kernel version you wish it to
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why you think it should be applied, and what kernel versions you wish it to
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be applied to.
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.. _option_3:
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@ -142,7 +148,7 @@ Option 3
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********
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Send the patch, after verifying that it follows the above rules, to
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stable@vger.kernel.org and mention the kernel version you wish it to be applied
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stable@vger.kernel.org and mention the kernel versions you wish it to be applied
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to. When doing so, you must note the upstream commit ID in the changelog of your
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submission with a separate line above the commit text, like this:
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