linux-kernel - Re: [PATCH 4.19 35/47] x86/irq: Seperate unused system vectors from spurious entry again

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Message-ID: <c2b7a96a-122e-bdec-7368-d54700a55915@canonical.com>
Date:   Mon, 17 Aug 2020 12:36:25 -0300
From:   "Guilherme G. Piccoli" <gpiccoli@...onical.com>
To:     Greg KH <gregkh@...uxfoundation.org>
Cc:     jan.kiszka@...mens.com, jbeulich@...e.com,
        linux-kernel@...r.kernel.org, marc.zyngier@....com,
        stable@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>,
        "Guilherme G. Piccoli" <kernel@...ccoli.net>,
        gpiccoli@...onical.com, pedro.principeza@...onical.com
Subject: Re: [PATCH 4.19 35/47] x86/irq: Seperate unused system vectors from
 spurious entry again

Hi Greg / Thomas and all involved here. First, apologies for
necro-bumping this thread, but I'm working a backport of this patch to
kernel 4.15 (Ubuntu) and then I noticed we have it on stable, but only
in 4.19+.

Since the fixes tag presents an old commit (since ~3.19), I'm curious if
we have a special reason to not have it on long-term stables, like 4.9
or 4.14. It's a subtle portion of arch code, so I'm afraid I didn't see
something that prevents its backport for previous versions.

Thanks in advance,

Guilherme