linux-kernel - Re: [PATCH v2 2/5] rosebush: Add new data structure

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Date: Sat, 29 Jun 2024 21:45:46 +0200
From: Markus Elfring <Markus.Elfring@....de>
To: Matthew Wilcox <willy@...radead.org>, LKML <linux-kernel@...r.kernel.org>
Cc: linux-fsdevel@...r.kernel.org, maple-tree@...ts.infradead.org
Subject: Re: [PATCH v2 2/5] rosebush: Add new data structure

…
> +++ b/lib/rosebush.c
> @@ -0,0 +1,654 @@
…
> +int rbh_remove(struct rbh *rbh, u32 hash, void *p)
> +{
…
> +	rcu_read_lock();
> +	bucket = lock_bucket(rbh, hash);
…
> +rcu_unlock:
> +	rcu_read_unlock();
> +	return err;
> +}
…

Under which circumstances would you become interested to apply a statement
like “guard(rcu)();”?
https://elixir.bootlin.com/linux/v6.10-rc5/source/include/linux/rcupdate.h#L1093

Regards,
Markus