| Message ID | 1283971469.2428.9.camel@edumazet-laptop |
|---|---|
| State | Accepted, archived |
| Delegated to: | David Miller |
| Headers | show |
From: Eric Dumazet <eric.dumazet@gmail.com> Date: Wed, 08 Sep 2010 20:44:29 +0200 > Le mercredi 08 septembre 2010 à 19:29 +0100, Ben Hutchings a écrit : > >> No semicolon on the end, please. The 'caller' will add that. > > Oh definitely, thanks ! > > [PATCH net-next-2.6] net: introduce rcu_dereference_rtnl > > We use rcu_dereference_check(p, rcu_read_lock_held() || > lockdep_rtnl_is_held()) several times in network stack. > > More usages to come too, so its time to create a helper. > > Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Applied, thanks Eric. -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/include/linux/rtnetlink.h b/include/linux/rtnetlink.h index 58d4449..263690d 100644 --- a/include/linux/rtnetlink.h +++ b/include/linux/rtnetlink.h @@ -749,6 +749,17 @@ extern int rtnl_is_locked(void); extern int lockdep_rtnl_is_held(void); #endif /* #ifdef CONFIG_PROVE_LOCKING */ +/** + * rcu_dereference_rtnl - rcu_dereference with debug checking + * @p: The pointer to read, prior to dereferencing + * + * Do an rcu_dereference(p), but check caller either holds rcu_read_lock() + * or RTNL + */ +#define rcu_dereference_rtnl(p) \ + rcu_dereference_check(p, rcu_read_lock_held() || \ + lockdep_rtnl_is_held()) + extern void rtnetlink_init(void); extern void __rtnl_unlock(void);