ip_rt_acct
extern struct ip_rt_acct __percpu *ip_rt_acct;
struct ip_rt_acct *st = this_cpu_ptr(ip_rt_acct);
struct ip_rt_acct *dst, *src;
dst = kzalloc_objs(struct ip_rt_acct, 256);
src = (struct ip_rt_acct *)per_cpu_ptr(ip_rt_acct, i);
seq_write(m, dst, 256 * sizeof(struct ip_rt_acct));
struct ip_rt_acct __percpu *ip_rt_acct __read_mostly;
ip_rt_acct = __alloc_percpu(256 * sizeof(struct ip_rt_acct), __alignof__(struct ip_rt_acct));
if (!ip_rt_acct)