linux-kernel - Re: [patch V2 14/17] entry: Provide generic exit to usermode functionality

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Message-ID: <CALCETrVArVWH2-ew4+WVxhX-3kzrspv2x8yw3RH3PyVGeAMudA@mail.gmail.com>
Date:   Wed, 23 Oct 2019 14:34:12 -0700
From:   Andy Lutomirski <luto@...nel.org>
To:     Thomas Gleixner <tglx@...utronix.de>
Cc:     LKML <linux-kernel@...r.kernel.org>, X86 ML <x86@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Andy Lutomirski <luto@...nel.org>,
        Will Deacon <will@...nel.org>,
        Paolo Bonzini <pbonzini@...hat.com>,
        kvm list <kvm@...r.kernel.org>,
        linux-arch <linux-arch@...r.kernel.org>,
        Mike Rapoport <rppt@...ux.ibm.com>,
        Josh Poimboeuf <jpoimboe@...hat.com>,
        Miroslav Benes <mbenes@...e.cz>
Subject: Re: [patch V2 14/17] entry: Provide generic exit to usermode functionality

On Wed, Oct 23, 2019 at 5:31 AM Thomas Gleixner <tglx@...utronix.de> wrote:
>
> From: Thomas Gleixner <tglx@...utronix.de>
>
> Provide a generic facility to handle the exit to usermode work. That's
> aimed to replace the pointlessly different copies in each architecture.


>  /**
> + * local_irq_enable_exit_to_user - Exit to user variant of local_irq_enable()
> + * @ti_work:   Cached TIF flags gathered with interrupts disabled
> + *
> + * Defaults to local_irq_enable(). Can be supplied by architecture specific
> + * code.

What did you have in mind here?