diff options
| -rw-r--r-- | include/net/inetpeer.h | 9 | ||||
| -rw-r--r-- | net/ipv6/output_core.c | 11 |
2 files changed, 4 insertions, 16 deletions
diff --git a/include/net/inetpeer.h b/include/net/inetpeer.h index 6efe73c79c5..058271bde27 100644 --- a/include/net/inetpeer.h +++ b/include/net/inetpeer.h @@ -177,16 +177,9 @@ static inline void inet_peer_refcheck(const struct inet_peer *p) /* can be called with or without local BH being disabled */ static inline int inet_getid(struct inet_peer *p, int more) { - int old, new; more++; inet_peer_refcheck(p); - do { - old = atomic_read(&p->ip_id_count); - new = old + more; - if (!new) - new = 1; - } while (atomic_cmpxchg(&p->ip_id_count, old, new) != old); - return new; + return atomic_add_return(more, &p->ip_id_count) - more; } #endif /* _NET_INETPEER_H */ diff --git a/net/ipv6/output_core.c b/net/ipv6/output_core.c index 6313abd53c9..56596ce390a 100644 --- a/net/ipv6/output_core.c +++ b/net/ipv6/output_core.c @@ -12,7 +12,7 @@ void ipv6_select_ident(struct frag_hdr *fhdr, struct rt6_info *rt) { static atomic_t ipv6_fragmentation_id; struct in6_addr addr; - int old, new; + int ident; #if IS_ENABLED(CONFIG_IPV6) struct inet_peer *peer; @@ -26,15 +26,10 @@ void ipv6_select_ident(struct frag_hdr *fhdr, struct rt6_info *rt) return; } #endif - do { - old = atomic_read(&ipv6_fragmentation_id); - new = old + 1; - if (!new) - new = 1; - } while (atomic_cmpxchg(&ipv6_fragmentation_id, old, new) != old); + ident = atomic_inc_return(&ipv6_fragmentation_id); addr = rt->rt6i_dst.addr; - addr.s6_addr32[0] ^= (__force __be32)new; + addr.s6_addr32[0] ^= (__force __be32)ident; fhdr->identification = htonl(secure_ipv6_id(addr.s6_addr32)); } EXPORT_SYMBOL(ipv6_select_ident); |