linux-kernel - Re: [PATCH 2/2] testing/radix-tree/maple: Hack around kfree

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Message-ID: <diytmqqhv2wd5guvbzuauenr4ucpttlqrcmffecqkdchjyi5bl@x57r6ypqysuw>
Date: Wed, 6 Aug 2025 11:21:19 +0100
From: Pedro Falcato <pfalcato@...e.de>
To: "Liam R. Howlett" <Liam.Howlett@...cle.com>, 
	Andrew Morton <akpm@...ux-foundation.org>, Matthew Wilcox <willy@...radead.org>, 
	maple-tree@...ts.infradead.org, linux-mm@...ck.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] testing/radix-tree/maple: Hack around kfree_rcu not
 existing

On Tue, Aug 05, 2025 at 09:26:47PM -0400, Liam R. Howlett wrote:
> * Pedro Falcato <pfalcato@...e.de> [250718 13:21]:
> > liburcu doesn't have kfree_rcu (or anything similar). Despite that, we
> > can hack around it in a trivial fashion, by adding a wrapper.
> > 
> > This wrapper only works for maple_nodes, and not anything else (due to
> > us not being able to know rcu_head offsets in any way), and thus we take
> > advantage of the type checking to avoid future silent breakage.
> > 
> > Signed-off-by: Pedro Falcato <pfalcato@...e.de>
> 
> Thanks, but shouldn't this be patch 1 so that the testing continues to
> work?

Yeah, that makes sense, I'll re-order these two on a possible v2.

-- 
Pedro