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These fields are updated asynchronously by the bonding state machine in ad_churn_machine() while holding bond->mode_lock. bond_info_show_slave() and bond_fill_slave_info() read them without bond->mode_lock being held, we need to add READ_ONCE() and WRITE_ONCE() annotations. Note that AD_CHURN_MONITOR, AD_CHURN, and AD_NO_CHURN are defined exclusively in (kernel private) include/net/bond_3ad.h header. They should be moved to include/uapi/linux/if_bonding.h or userspace tools will have to hardcode their values. Fixes:4916f2e2f3("bonding: print churn state via netlink") Fixes:14c9551a32("bonding: Implement port churn-machine (AD standard 43.4.17).") Signed-off-by: Eric Dumazet <edumazet@google.com> Link: https://patch.msgid.link/20260603123514.388226-1-edumazet@google.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>