[PATCH] nvme: wait for SRCU readers before splicing the namespace list

[Qiliang Yuan]

On Tue, Nov 03, 2026 at 09:14:18AM +0100, Christoph Hellwig wrote:
> This feels like a design issue with list_splice_init_rcu or rather
> using list_splice_init_rcu with SRCU.  Do we need to encapsulate
> and verify this logic in a list_splice_init_srcu so that other
> potential users won't get it wrong again?

Makes sense. nvme is the only caller that pairs it with SRCU today; the
others (btrfs, apparmor, ima, smack) protect their lists with plain RCU.

I'll add list_splice_init_srcu(), which takes the srcu_struct to wait
on, as a separate patch next to list_splice_init_rcu(), and switch nvme
to it in v2.

Thanks,
Qiliang