bh_lru
static DEFINE_PER_CPU(struct bh_lru, bh_lrus) = {{ NULL }};
struct bh_lru *b;
static void __invalidate_bh_lrus(struct bh_lru *b)
struct bh_lru *b = &get_cpu_var(bh_lrus);
struct bh_lru *b = per_cpu_ptr(&bh_lrus, cpu);
struct bh_lru *b;
struct bh_lru *b = &per_cpu(bh_lrus, cpu);