diff options
Diffstat (limited to 'datapath/linux/compat/include/linux/rculist.h')
| -rw-r--r-- | datapath/linux/compat/include/linux/rculist.h | 23 |
1 files changed, 21 insertions, 2 deletions
diff --git a/datapath/linux/compat/include/linux/rculist.h b/datapath/linux/compat/include/linux/rculist.h index 8df8ad8a2..40fd5e171 100644 --- a/datapath/linux/compat/include/linux/rculist.h +++ b/datapath/linux/compat/include/linux/rculist.h @@ -9,9 +9,28 @@ #define hlist_pprev_rcu(node) (*((struct hlist_node __rcu **)((node)->pprev))) #endif +/* + * Check during list traversal that we are within an RCU reader + */ + +#define check_arg_count_one(dummy) + +#ifdef CONFIG_PROVE_RCU_LIST +#define __list_check_rcu(dummy, cond, extra...) \ + ({ \ + check_arg_count_one(extra); \ + RCU_LOCKDEP_WARN(!cond && !rcu_read_lock_any_held(), \ + "RCU-list traversed in non-reader section!"); \ + }) +#else +#define __list_check_rcu(dummy, cond, extra...) \ + ({ check_arg_count_one(extra); }) +#endif + #undef hlist_for_each_entry_rcu -#define hlist_for_each_entry_rcu(pos, head, member) \ - for (pos = hlist_entry_safe (rcu_dereference_raw(hlist_first_rcu(head)),\ +#define hlist_for_each_entry_rcu(pos, head, member, cond...) \ + for (__list_check_rcu(dummy, ## cond, 0), \ + pos = hlist_entry_safe(rcu_dereference_raw(hlist_first_rcu(head)),\ typeof(*(pos)), member); \ pos; \ pos = hlist_entry_safe(rcu_dereference_raw(hlist_next_rcu(\ |