net: add rtnl_dereference()
We sometime want to dereference an rcu protected pointer while holding RTNL. Use a macro to hide all lockdep details. Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -760,6 +760,15 @@ extern int lockdep_rtnl_is_held(void);
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rcu_dereference_check(p, rcu_read_lock_held() || \
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rcu_dereference_check(p, rcu_read_lock_held() || \
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lockdep_rtnl_is_held())
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lockdep_rtnl_is_held())
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/**
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* rtnl_dereference - rcu_dereference with debug checking
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* @p: The pointer to read, prior to dereferencing
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*
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* Do an rcu_dereference(p), but check caller holds RTNL
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*/
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#define rtnl_dereference(p) \
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rcu_dereference_check(p, lockdep_rtnl_is_held())
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extern void rtnetlink_init(void);
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extern void rtnetlink_init(void);
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extern void __rtnl_unlock(void);
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extern void __rtnl_unlock(void);
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