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Commit 7dff59ef authored by Eric Dumazet's avatar Eric Dumazet Committed by David S. Miller
Browse files

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: default avatarEric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent e0de7c93

include/linux/rtnetlink.h

+9 −0
Original line number Diff line number Diff line
@@ -760,6 +760,15 @@ extern int lockdep_rtnl_is_held(void); 
	rcu_dereference_check(p, rcu_read_lock_held() ||	\

				 lockdep_rtnl_is_held())



/**

 * rtnl_dereference - rcu_dereference with debug checking

 * @p: The pointer to read, prior to dereferencing

 *

 * Do an rcu_dereference(p), but check caller holds RTNL

 */

#define rtnl_dereference(p)					\

	rcu_dereference_check(p, lockdep_rtnl_is_held())



extern void rtnetlink_init(void);

extern void __rtnl_unlock(void);