| Message ID | 1284584835.2462.69.camel@edumazet-laptop |
|---|---|
| State | Accepted, archived |
| Delegated to: | David Miller |
| Headers | show |
From: Eric Dumazet <eric.dumazet@gmail.com> Date: Wed, 15 Sep 2010 23:07:15 +0200 > 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> Applied. -- 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 263690d..68c436b 100644 --- a/include/linux/rtnetlink.h +++ b/include/linux/rtnetlink.h @@ -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);
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> --- include/linux/rtnetlink.h | 9 +++++++++ 1 files changed, 9 insertions(+) -- 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