netdev - Re: [PATCH net-next] net: alacritech: Use u64_stats_t with u64_stats

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Message-ID: <20260125152324.1b7e5a9f@kernel.org>
Date: Sun, 25 Jan 2026 15:23:24 -0800
From: Jakub Kicinski <kuba@...nel.org>
To: David Yang <mmyangfl@...il.com>, Eric Dumazet <edumazet@...gle.com>
Cc: netdev@...r.kernel.org, Lino Sanfilippo <LinoSanfilippo@....de>, Andrew
 Lunn <andrew+netdev@...n.ch>, "David S. Miller" <davem@...emloft.net>,
 Paolo Abeni <pabeni@...hat.com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH net-next] net: alacritech: Use u64_stats_t with
 u64_stats_sync properly

On Fri, 23 Jan 2026 02:51:07 +0800 David Yang wrote:
> On 64bit arches, struct u64_stats_sync is empty and provides no help
> against load/store tearing. Convert to u64_stats_t to ensure atomic
> operations.

Eric, could you comment if this matters? I expect David may send a
non-trivial number of these, I want to make sure we're making good
use of everyone's time here. 64b accesses are not torn on 64b arches,
and never used for control flow.