linux-kernel - Re: [PATCH] pinctrl: use non-devm kmalloc versions for free functions

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Message-ID: <20170511144526.GA30473@htj.duckdns.org>
Date:   Thu, 11 May 2017 10:45:26 -0400
From:   Tejun Heo <tj@...nel.org>
To:     Andre Przywara <andre.przywara@....com>
Cc:     Linus Walleij <linus.walleij@...aro.org>,
        Icenowy Zheng <icenowy@...c.xyz>,
        Adam Borowski <kilobyte@...band.pl>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Maxime Ripard <maxime.ripard@...e-electrons.com>,
        Chen-Yu Tsai <wens@...e.org>,
        linux-sunxi <linux-sunxi@...glegroups.com>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] pinctrl: use non-devm kmalloc versions for free functions

Hello,

On Thu, May 11, 2017 at 03:20:58PM +0100, Andre Przywara wrote:
> > Tejun, do I read your comments on the patch as an ACK?
> 
> Tejun and I were wondering why we need this "create an array with the
> indices" in the first place. If we can just call radix_tree_delete()
> directly from the radix_tree_for_each_slot() loop, we can have a much
> better fix (omitting the memory allocation at all)

Yeah, it doesn't make sense to allocate to destroy a radix tree.  It'd
be much better to cleanup the code so that it doesn't need allocation
in the first place.

Thanks.

-- 
tejun