forked from luck/tmp_suning_uos_patched
rcu: rcu_read_lock_bh_held(): disabling irqs also disables bh
rcu_dereference_bh() doesnt know yet about hard irq being disabled, so
lockdep can trigger in netpoll_rx() after commit f0f9deae9e
(netpoll:
Disable IRQ around RCU dereference in netpoll_rx)
Reported-by: Miles Lane <miles.lane@gmail.com>
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Tested-by: Miles Lane <miles.lane@gmail.com>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
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parent
27c379f7f8
commit
b3a084b9b6
@ -454,7 +454,7 @@ static inline notrace void rcu_read_unlock_sched_notrace(void)
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* Makes rcu_dereference_check() do the dirty work.
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*/
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#define rcu_dereference_bh(p) \
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rcu_dereference_check(p, rcu_read_lock_bh_held())
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rcu_dereference_check(p, rcu_read_lock_bh_held() || irqs_disabled())
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/**
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* rcu_dereference_sched - fetch RCU-protected pointer, checking for RCU-sched
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