From: Li RongQing <lirongqing@xxxxxxxxx>
using 64bit computation to slightly optimize nf_inet_addr_mask
Signed-off-by: Li RongQing <lirongqing@xxxxxxxxx>
Signed-off-by: Pablo Neira Ayuso <pablo@xxxxxxxxxxxxx>
---
include/linux/netfilter.h | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/include/linux/netfilter.h b/include/linux/netfilter.h
index a7252f3baeb0..996bc247ef6e 100644
--- a/include/linux/netfilter.h
+++ b/include/linux/netfilter.h
@@ -41,10 +41,19 @@ static inline void nf_inet_addr_mask(const union nf_inet_addr *a1,
union nf_inet_addr *result,
const union nf_inet_addr *mask)
{
+#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
+ const unsigned long *ua = (const unsigned long *)a1;
+ unsigned long *ur = (unsigned long *)result;
+ const unsigned long *um = (const unsigned long *)mask;
+
+ ur[0] = ua[0] & um[0];
+ ur[1] = ua[1] & um[1];
+#else
result->all[0] = a1->all[0] & mask->all[0];
result->all[1] = a1->all[1] & mask->all[1];
result->all[2] = a1->all[2] & mask->all[2];
result->all[3] = a1->all[3] & mask->all[3];
+#endif
}
int netfilter_init(void);
--
2.11.0
