linux-kernel - Re: [patch V2 08/15] Documentation: Add lock ordering and nesting documentation

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Message-ID: <871rpo5ih7.fsf@nanos.tec.linutronix.de>
Date:   Thu, 19 Mar 2020 19:04:36 +0100
From:   Thomas Gleixner <tglx@...utronix.de>
To:     Jonathan Corbet <corbet@....net>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Ingo Molnar <mingo@...nel.org>, Will Deacon <will@...nel.org>,
        "Paul E . McKenney" <paulmck@...nel.org>,
        Joel Fernandes <joel@...lfernandes.org>,
        Steven Rostedt <rostedt@...dmis.org>,
        Randy Dunlap <rdunlap@...radead.org>,
        Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
        Logan Gunthorpe <logang@...tatee.com>,
        Kurt Schwemmer <kurt.schwemmer@...rosemi.com>,
        Bjorn Helgaas <bhelgaas@...gle.com>, linux-pci@...r.kernel.org,
        Felipe Balbi <balbi@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-usb@...r.kernel.org, Kalle Valo <kvalo@...eaurora.org>,
        "David S. Miller" <davem@...emloft.net>,
        linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
        Oleg Nesterov <oleg@...hat.com>,
        Davidlohr Bueso <dave@...olabs.net>,
        Michael Ellerman <mpe@...erman.id.au>,
        Arnd Bergmann <arnd@...db.de>, linuxppc-dev@...ts.ozlabs.org
Subject: Re: [patch V2 08/15] Documentation: Add lock ordering and nesting documentation

Jonathan Corbet <corbet@....net> writes:
> On Wed, 18 Mar 2020 21:43:10 +0100
> Thomas Gleixner <tglx@...utronix.de> wrote:
>> Add initial documentation.
>
> ...time to add a a couple of nits...:)

...time

Is that valid RST?

>> +++ b/Documentation/locking/locktypes.rst
>> @@ -0,0 +1,298 @@
>> +.. _kernel_hacking_locktypes:
>> +
>
> So ... I vaguely remember that some Thomas guy added a document saying we
> should be putting SPDX tags on our files? :)

Never met him or heard about that.

>> +
>> +The preferred solution is to use :c:func:`spin_lock_irq()` or
>> +:c:func:`spin_lock_irqsave()` and their unlock counterparts.
>
> We don't need (and shouldn't use) :c:func: anymore; just saying
> spin_lock_irq() will cause the Right Things to happen.

Good to know. Will fix.

Thanks,

        tglx