diff options
Diffstat (limited to 'include/linux/netfilter/x_tables.h')
| -rw-r--r-- | include/linux/netfilter/x_tables.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/include/linux/netfilter/x_tables.h b/include/linux/netfilter/x_tables.h index 8d674a786744..3f2bc5755a96 100644 --- a/include/linux/netfilter/x_tables.h +++ b/include/linux/netfilter/x_tables.h @@ -186,6 +186,7 @@ struct xt_counters_info { #ifdef __KERNEL__ #include <linux/netdevice.h> +#include <linux/locallock.h> /** * struct xt_action_param - parameters for matches/targets @@ -466,6 +467,8 @@ extern void xt_free_table_info(struct xt_table_info *info); */ DECLARE_PER_CPU(seqcount_t, xt_recseq); +DECLARE_LOCAL_IRQ_LOCK(xt_write_lock); + /** * xt_write_recseq_begin - start of a write section * @@ -480,6 +483,9 @@ static inline unsigned int xt_write_recseq_begin(void) { unsigned int addend; + /* RT protection */ + local_lock(xt_write_lock); + /* * Low order bit of sequence is set if we already * called xt_write_recseq_begin(). @@ -510,6 +516,7 @@ static inline void xt_write_recseq_end(unsigned int addend) /* this is kind of a write_seqcount_end(), but addend is 0 or 1 */ smp_wmb(); __this_cpu_add(xt_recseq.sequence, addend); + local_unlock(xt_write_lock); } /* |