diff options
| author | Jamal Hadi Salim <jhs@mojatatu.com> | 2023-12-15 14:57:10 -0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2023-12-18 02:05:45 +0000 |
| commit | 32da0f00ddcb101730cf242289b2b10ede0e1156 (patch) | |
| tree | 8daf166be3fa8a86ed9dd5753d0ea801622f7c47 /include/linux | |
| parent | 54f4c2570a19186dfebd555b163084c1824cf1d6 (diff) | |
net: rtnl: introduce rcu_replace_pointer_rtnl
Introduce the rcu_replace_pointer_rtnl helper to lockdep check rtnl lock
rcu replacements, alongside the already existing helpers.
This is a quality of life helper so instead of using:
rcu_replace_pointer(rp, p, lockdep_rtnl_is_held())
.. or the open coded..
rtnl_dereference() / rcu_assign_pointer()
.. or the lazy check version ..
rcu_replace_pointer(rp, p, 1)
Use:
rcu_replace_pointer_rtnl(rp, p)
Signed-off-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: Victor Nogueira <victor@mojatatu.com>
Signed-off-by: Pedro Tammela <pctammela@mojatatu.com>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: Nikolay Aleksandrov <razor@blackwall.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/rtnetlink.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/include/linux/rtnetlink.h b/include/linux/rtnetlink.h index 6a8543b34e2c..410529fca18b 100644 --- a/include/linux/rtnetlink.h +++ b/include/linux/rtnetlink.h @@ -79,6 +79,18 @@ static inline bool lockdep_rtnl_is_held(void) #define rtnl_dereference(p) \ rcu_dereference_protected(p, lockdep_rtnl_is_held()) +/** + * rcu_replace_pointer_rtnl - replace an RCU pointer under rtnl_lock, returning + * its old value + * @rp: RCU pointer, whose value is returned + * @p: regular pointer + * + * Perform a replacement under rtnl_lock, where @rp is an RCU-annotated + * pointer. The old value of @rp is returned, and @rp is set to @p + */ +#define rcu_replace_pointer_rtnl(rp, p) \ + rcu_replace_pointer(rp, p, lockdep_rtnl_is_held()) + static inline struct netdev_queue *dev_ingress_queue(struct net_device *dev) { return rtnl_dereference(dev->ingress_queue); |