arch_get_random_seed_longs
size_t __must_check arch_get_random_seed_longs(unsigned long *v, size_t max_longs);
EXPORT_SYMBOL(arch_get_random_seed_longs);
if (!arch_get_random_seed_longs(&rand, 1))
longs = arch_get_random_seed_longs(&block.rdseed[i], ARRAY_SIZE(block.rdseed) - i);
longs = arch_get_random_seed_longs(entropy, ARRAY_SIZE(entropy) - i);