nlh->nlmsg_flags = flags;
nlh->nlmsg_pid = pid;
nlh->nlmsg_seq = seq;
- memset(NLMSG_DATA(nlh) + len, 0, NLMSG_ALIGN(size) - size);
+ if (!__builtin_constant_p(size) || NLMSG_ALIGN(size) - size != 0)
+ memset(NLMSG_DATA(nlh) + len, 0, NLMSG_ALIGN(size) - size);
return nlh;
}