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From: David Yang <mmyangfl@gmail.com>
To: netdev@vger.kernel.org
Cc: David Yang <mmyangfl@gmail.com>,
	Sabrina Dubroca <sd@queasysnail.net>,
	Andrew Lunn <andrew+netdev@lunn.ch>,
	"David S. Miller" <davem@davemloft.net>,
	Eric Dumazet <edumazet@google.com>,
	Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
	Nikolay Aleksandrov <razor@blackwall.org>,
	Ido Schimmel <idosch@nvidia.com>, Simon Horman <horms@kernel.org>,
	Aaron Conole <aconole@redhat.com>,
	Eelco Chaudron <echaudro@redhat.com>,
	Ilya Maximets <i.maximets@ovn.org>,
	Shigeru Yoshida <syoshida@redhat.com>,
	Stanislav Fomichev <sdf@fomichev.me>,
	Breno Leitao <leitao@debian.org>,
	Carolina Jubran <cjubran@nvidia.com>,
	Kuniyuki Iwashima <kuniyu@google.com>,
	Guillaume Nault <gnault@redhat.com>,
	linux-kernel@vger.kernel.org, bridge@lists.linux.dev,
	dev@openvswitch.org
Subject: [PATCH net-next v2 0/7] u64_stats: Introduce u64_stats_reads()
Date: Sat, 24 Jan 2026 00:21:32 +0800	[thread overview]
Message-ID: <20260123162159.2877941-1-mmyangfl@gmail.com> (raw)

On 64bit arches, struct u64_stats_sync is empty and provides no help
against load/store tearing. memcpy() and struct copying should not be
considered tear-free. Use u64_stats_reads() instead.

v1: https://lore.kernel.org/r/20260120092137.2161162-1-mmyangfl@gmail.com
  - rename to u64_stats_reads() to clarify data flow direction
  - refine the implementation
  - add docs
  - fix struct copying too

David Yang (7):
  u64_stats: Introduce u64_stats_reads()
  u64_stats: Doc incorrect usage with plain variables
  net: bridge: mcast: fix memcpy with u64_stats
  net: openvswitch: fix load tearing with u64_stats
  macsec: fix memcpy with u64_stats
  mpls: Fix load tearing with u64_stats
  vxlan: vnifilter: fix memcpy with u64_stats

 drivers/net/macsec.c                |  6 ++--
 drivers/net/vxlan/vxlan_vnifilter.c |  2 +-
 include/linux/u64_stats_sync.h      | 56 ++++++++++++++++++++++++-----
 net/bridge/br_multicast.c           |  2 +-
 net/mpls/af_mpls.c                  |  2 +-
 net/openvswitch/datapath.c          |  3 +-
 6 files changed, 55 insertions(+), 16 deletions(-)

-- 
2.51.0


             reply	other threads:[~2026-01-23 18:17 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-01-23 16:21 David Yang [this message]
2026-01-23 16:21 ` [PATCH net-next v2 1/7] u64_stats: Introduce u64_stats_reads() David Yang
2026-01-23 16:21 ` [PATCH net-next v2 2/7] u64_stats: Doc incorrect usage with plain variables David Yang
2026-01-23 16:21 ` [PATCH net-next v2 3/7] net: bridge: mcast: fix memcpy with u64_stats David Yang
2026-01-23 16:21 ` [PATCH net-next v2 4/7] net: openvswitch: fix load tearing " David Yang
2026-01-24  0:49   ` kernel test robot
2026-01-26 12:25   ` Ilya Maximets
2026-01-26 18:29   ` David Laight
2026-01-26 18:35     ` Eric Dumazet
2026-01-26 19:18       ` David Laight
2026-01-23 16:21 ` [PATCH net-next v2 5/7] macsec: fix memcpy " David Yang
2026-01-23 16:21 ` [PATCH net-next v2 6/7] mpls: Fix load tearing " David Yang
2026-01-23 16:21 ` [PATCH net-next v2 7/7] vxlan: vnifilter: fix memcpy " David Yang

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