linux-kernel - Re: [PATCH v3 06/20] seqlock: Extend seqcount API with associated locks

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Message-ID: <20200708104349.GA20372@debian-buster-darwi.lab.linutronix.de>
Date:   Wed, 8 Jul 2020 12:43:49 +0200
From:   "Ahmed S. Darwish" <a.darwish@...utronix.de>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     Ingo Molnar <mingo@...hat.com>, Will Deacon <will@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        "Paul E. McKenney" <paulmck@...nel.org>,
        "Sebastian A. Siewior" <bigeasy@...utronix.de>,
        Steven Rostedt <rostedt@...dmis.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v3 06/20] seqlock: Extend seqcount API with associated
 locks

On Wed, Jul 08, 2020 at 11:12:01AM +0200, Peter Zijlstra wrote:
> On Tue, Jul 07, 2020 at 04:37:26PM +0200, Peter Zijlstra wrote:
> > + * Use the ``_irqsave`` and ``_bh`` variants instead if the read side
> > + * ``_bh`` variant of write_seqlock(). Use only if the read side section
> > + * ``_irq`` variant of write_sequnlock(). The write side section of
> > + * ``_irqsave`` variant of write_seqlock(). Use if the read section of
> > + * ``_irqrestore`` variant of write_sequnlock(). The write section of
> > + * ``_bh`` variant of read_seqlock_excl(). Use this variant if the
> > + * ``_bh`` variant of read_sequnlock_excl(). The closed section must've
> > + * ``_irq`` variant of read_seqlock_excl(). Use this only if the
> > + * ``_irq`` variant of read_sequnlock_excl(). The closed section must've
> > + * ``_irqsave`` variant of read_seqlock_excl(). Use this only if the
> > + * ``_irqrestore`` variant of read_sequnlock_excl(). The closed section
> > + * This is the ``_irqsave`` variant of read_seqbegin_or_lock(). Use if
> > + * This is the ``_irqrestore`` variant of done_seqretry(). The read
>
> Can we also get rid of that '' nonsense, the gods of ASCII gifted us "
> for this.

Hehe, why not. I welcome back our ASCII overlords.