linux-kernel - Re: [PATCH v2] x86/entry: re-enable interrupts before exiting

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Message-ID: <CALCETrXj_LZ3n1tJZAKRwNP4VrVibUqEhcMQpHuYMq8bb-OkZQ@mail.gmail.com>
Date:   Sat, 6 Apr 2019 07:21:45 -0700
From:   Andy Lutomirski <luto@...nel.org>
To:     Tycho Andersen <tycho@...ho.ws>
Cc:     Andy Lutomirski <luto@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>, X86 ML <x86@...nel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Khalid Aziz <khalid.aziz@...cle.com>,
        Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
        Josh Poimboeuf <jpoimboe@...hat.com>
Subject: Re: [PATCH v2] x86/entry: re-enable interrupts before exiting

On Fri, Apr 5, 2019 at 9:19 AM Tycho Andersen <tycho@...ho.ws> wrote:
>
> If the kernel oopses in an interrupt, nothing re-enables interrupts:

You probably should also set irq_count back to -1, too, if you really
want this thing to fully survive being called from an IRQ.