From: Stephen Warren <swarren@wwwdotorg.org>
To: Lars-Peter Clausen <lars@metafoo.de>
Cc: Mark Brown <broonie@kernel.org>, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] regmap: Make regmap-mmio usable from atomic contexts
Date: Fri, 24 May 2013 09:40:07 -0600 [thread overview]
Message-ID: <519F89D7.3000009@wwwdotorg.org> (raw)
In-Reply-To: <1369384162-25196-1-git-send-email-lars@metafoo.de>
On 05/24/2013 02:29 AM, Lars-Peter Clausen wrote:
> regmap-mmio uses a spinlock with spin_lock() and spin_unlock() for locking.
> To be able to use the regmap API from different contexts (atomic vs non-atomic),
> without the risk of race conditions, we need to use spin_lock_irqsave() and
> spin_lock_irqrestore() instead. A new field, the spinlock_flags field, is added
> to regmap struct to store the flags between regmap_{,un}lock_spinlock(). The
> spinlock_flags field itself is also protected by the spinlock.
Reviewed-by: Stephen Warren <swarren@nvidia.com>
next prev parent reply other threads:[~2013-05-24 15:40 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-05-24 8:29 [PATCH] regmap: Make regmap-mmio usable from atomic contexts Lars-Peter Clausen
2013-05-24 15:40 ` Stephen Warren [this message]
2013-05-25 15:15 ` Mark Brown
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