Kernel 2.6.22.6 hangs in synchronize_rcu

[llandre]

I'm porting kernel 2.6.22.6 on custom embedded system (ARM1136).
During network subsystem initialization, kernel hangs in function 
synchronize_rcu invoked by synchronize_net. In particular
wait_for_completion(&rcu.completion);
never returns and wakeme_after_rcu is never hit.
Anybody can give me any advice about how to investigate this issue?

void synchronize_rcu(void)
{
    struct rcu_synchronize rcu;

    init_completion(&rcu.completion);
    /* Will wake me after RCU finished */
    call_rcu(&rcu.head, wakeme_after_rcu);

    /* Wait for it */
    wait_for_completion(&rcu.completion);
}


Thanks in advance,
llandre

DAVE Electronics System House - R&D Department
web:   http://www.dave-tech.it
email: r&d2@xxxxxxxxxxxx
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