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	Sat, 05 Jul 2025 08:16:04 +0000
Date: Sat, 5 Jul 2025 09:16:04 +0100
From: Al Viro <viro@zeniv.linux.org.uk>
To: Miklos Szeredi <miklos@szeredi.hu>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
	linux-fsdevel@vger.kernel.org,
	Christian Brauner <brauner@kernel.org>
Subject: Re: [RFC] MNT_WRITE_HOLD mess
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Sender: Al Viro <viro@ftp.linux.org.uk>

On Sat, Jul 05, 2025 at 06:57:15AM +0100, Al Viro wrote:
> +static inline void mnt_add_instance(struct mount *m, struct super_block *s)
> +{
> +	struct mount *first = s->s_mounts;
> +
> +	if (first)
> +		first->mnt_prev_for_sb = (unsigned long)m;
					 ^^^^^^^^^^^^^^^^
					 (unsigned long)&m->mnt_next_for_sb;

that is...