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Date:   Fri, 13 Mar 2020 12:12:12 -0700
From:   Matthew Wilcox <willy@infradead.org>
To:     Qiujun Huang <hqjagain@gmail.com>
Cc:     gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 2/2] radix-tree: fix a typo
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 <20200313184909.4560-3-hqjagain@gmail.com>
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On Sat, Mar 14, 2020 at 02:49:09AM +0800, Qiujun Huang wrote:
> "iff" -> "if"

> - *	This function can be called under rcu_read_lock iff the slot is not
> + *	This function can be called under rcu_read_lock if the slot is not

That's not a typo, it's a mathematician's shorthand for "if and only if".
I'm not excited about fixing problems in the radix tree code; better to
focus efforts on migrating users to the xarray.

http://git.infradead.org/users/willy/linux-dax.git/shortlog/refs/heads/xarray-conv
is an out of date effort to do every user.