linux-kernel - Re: [PATCH v2] gpiolib: cdev: document that line eflags are shared

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Message-ID: <CAMpxmJVS4gCvV3+K3CC5mq71FhfYmam7w4ebL2_k1TPYN8gHEQ@mail.gmail.com>
Date:   Mon, 26 Oct 2020 15:26:59 +0100
From:   Bartosz Golaszewski <bgolaszewski@...libre.com>
To:     Kent Gibson <warthog618@...il.com>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        linux-gpio <linux-gpio@...r.kernel.org>,
        Linus Walleij <linus.walleij@...aro.org>
Subject: Re: [PATCH v2] gpiolib: cdev: document that line eflags are shared

On Wed, Oct 14, 2020 at 8:29 AM Kent Gibson <warthog618@...il.com> wrote:
>
> The line.eflags field is shared so document this fact and highlight it
> throughout using READ_ONCE() and WRITE_ONCE() accessors.
>
> Also use a local copy of the eflags in edge_irq_thread() to ensure
> consistent control flow even if eflags changes.  This is only a defensive
> measure as edge_irq_thread() is currently disabled when the eflags are
> changed.
>
> Signed-off-by: Kent Gibson <warthog618@...il.com>
> ---
>

Patch applied, thanks!

Bartosz