linux-kernel - Re: [PATCH 2/3] ns: pad refcount

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Message-ID: <aSNZVv6BZCZcRsgs@redhat.com>
Date: Sun, 23 Nov 2025 19:58:30 +0100
From: Oleg Nesterov <oleg@...hat.com>
To: Mateusz Guzik <mjguzik@...il.com>
Cc: brauner@...nel.org, linux-kernel@...r.kernel.org,
	akpm@...ux-foundation.org, linux-mm@...ck.org
Subject: Re: [PATCH 2/3] ns: pad refcount

On 11/23, Mateusz Guzik wrote:
>
>  struct ns_common {
> +	struct {
> +		refcount_t __ns_ref; /* do not use directly */
> +	} ____cacheline_aligned_in_smp;

Cough... stupid question. Why not just

	refcount_t __ns_ref ____cacheline_aligned_in_smp;

? why do we need the anonymous struct?

Oleg.