linux-kernel - Re: [RFC PATCH 2/2] regmap: Reject fast_io regmap configurations with RBTREE and MAPLE caches

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Message-ID: <52f21f66-96e3-4ff9-b1bf-625bdc535b42@sirena.org.uk>
Date:   Fri, 21 Jul 2023 17:14:42 +0100
From:   Mark Brown <broonie@...nel.org>
To:     Guenter Roeck <linux@...ck-us.net>
Cc:     Marek Szyprowski <m.szyprowski@...sung.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "Rafael J . Wysocki" <rafael@...nel.org>,
        linux-kernel@...r.kernel.org, linux-rockchip@...ts.infradead.org,
        Heiko Stuebner <heiko@...ech.de>,
        Andy Yan <andy.yan@...k-chips.com>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Dan Carpenter <dan.carpenter@...aro.org>
Subject: Re: [RFC PATCH 2/2] regmap: Reject fast_io regmap configurations
 with RBTREE and MAPLE caches

On Fri, Jul 21, 2023 at 09:01:03AM -0700, Guenter Roeck wrote:
> On 7/21/23 08:13, Mark Brown wrote:

> > Yeah.  You *can* use the dynamically allocating caches safely if you
> > ensure that no new cache nodes are allocated during I/O.  I'd not
> > realised people were actually doing this.

> Ok.

> Dan, let me know if you don't have time to send a proper patch.
> I have one based on your suggestion prepared that I could send out
> if needed.

Dan sent the patch already, assuming my CI doesn't blow up unexpectedly
it should be applied tonight.

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