Merge branch 'net-bridge-take-care-of-p-flags-accesses'

Eric Dumazet says:

====================
net: bridge: take care of p->flags accesses

(struct net_bridge_port)->flags can be read/written locklessly,
and thus can fire KCSAN warnings, or real bugs.

Prefer atomic operations (test_bit(), clear_bit(), set_bit())
and use READ_ONCE() for the remaining uses.
====================

Link: https://patch.msgid.link/20260611203453.3067462-1-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>