sysctl_fib_multipath_hash_seed
seed = READ_ONCE(net->ipv4.sysctl_fib_multipath_hash_seed).user_seed;
mp_seed = READ_ONCE(net->ipv4.sysctl_fib_multipath_hash_seed.mp_seed);
struct sysctl_fib_multipath_hash_seed sysctl_fib_multipath_hash_seed;
struct sysctl_fib_multipath_hash_seed new = {
WRITE_ONCE(net->ipv4.sysctl_fib_multipath_hash_seed.user_seed, new.user_seed);
WRITE_ONCE(net->ipv4.sysctl_fib_multipath_hash_seed.mp_seed, new.mp_seed);
struct sysctl_fib_multipath_hash_seed *mphs;
mphs = &net->ipv4.sysctl_fib_multipath_hash_seed;