From: Alban <albeu@free.fr>
To: Julia Cartwright <julia@ni.com>
Cc: Aban Bedel <albeu@free.fr>,
Linus Walleij <linus.walleij@linaro.org>,
Alexandre Courbot <gnurou@gmail.com>,
linux-kernel@vger.kernel.org,
Thomas Gleixner <tglx@linutronix.de>,
linux-gpio@vger.kernel.org
Subject: Re: [PATCH 06/19] gpio: ath79: make use of raw_spinlock variants
Date: Mon, 13 Mar 2017 20:51:30 +0100 [thread overview]
Message-ID: <20170313205130.2b5c5272@tock> (raw)
In-Reply-To: <1774d7bad8bbc672372480f540dfc8f3d1592533.1489015238.git.julia@ni.com>
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On Thu, 9 Mar 2017 10:21:53 -0600
Julia Cartwright <julia@ni.com> wrote:
> The ath79 gpio driver currently implements an irq_chip for handling
> interrupts; due to how irq_chip handling is done, it's necessary for the
> irq_chip methods to be invoked from hardirq context, even on a a
> real-time kernel. Because the spinlock_t type becomes a "sleeping"
> spinlock w/ RT kernels, it is not suitable to be used with irq_chips.
>
> A quick audit of the operations under the lock reveal that they do only
> minimal, bounded work, and are therefore safe to do under a raw spinlock.
>
> Signed-off-by: Julia Cartwright <julia@ni.com>
Acked-by: Aban Bedel <albeu@free.fr>
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next prev parent reply other threads:[~2017-03-13 19:51 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <cover.1489015238.git.julia@ni.com>
2017-03-09 16:21 ` [PATCH 02/19] gpio: altera: make use of raw_spinlock variants Julia Cartwright
2017-03-15 9:53 ` Linus Walleij
2017-03-09 16:21 ` [PATCH 05/19] gpio: 104-dio-48e: " Julia Cartwright
2017-03-09 18:35 ` William Breathitt Gray
2017-03-15 9:54 ` Linus Walleij
2017-03-09 16:21 ` [PATCH 06/19] gpio: ath79: " Julia Cartwright
2017-03-13 19:51 ` Alban [this message]
2017-03-15 9:59 ` Linus Walleij
2017-03-09 16:21 ` [PATCH 07/19] gpio: bcm-kona: " Julia Cartwright
2017-03-10 17:28 ` Ray Jui
2017-03-10 19:35 ` Julia Cartwright
2017-03-15 9:57 ` Linus Walleij
2017-03-15 9:56 ` Linus Walleij
2017-03-09 16:21 ` [PATCH 08/19] gpio: etraxfs: " Julia Cartwright
2017-03-15 10:00 ` Linus Walleij
2017-03-09 16:21 ` [PATCH 09/19] gpio: pl061: " Julia Cartwright
2017-03-15 10:01 ` Linus Walleij
2017-03-09 16:21 ` [PATCH 10/19] gpio: ws16c48: " Julia Cartwright
2017-03-09 18:36 ` William Breathitt Gray
2017-03-15 10:02 ` Linus Walleij
2017-03-09 16:21 ` [PATCH 11/19] gpio: zx: " Julia Cartwright
2017-03-15 10:03 ` Linus Walleij
2017-03-09 16:22 ` [PATCH 16/19] pinctrl: bcm: " Julia Cartwright
2017-03-15 10:11 ` Linus Walleij
2017-03-09 16:22 ` [PATCH 17/19] pinctrl: amd: " Julia Cartwright
2017-03-15 10:12 ` Linus Walleij
2017-03-09 16:22 ` [PATCH 18/19] pinctrl: sirf: atlas7: " Julia Cartwright
2017-03-15 10:13 ` Linus Walleij
2017-03-09 16:22 ` [PATCH 19/19] pinctrl: sunxi: " Julia Cartwright
2017-03-15 10:14 ` Linus Walleij
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