cached_stacks 192 kernel/fork.c static DEFINE_PER_CPU(struct vm_struct *, cached_stacks[NR_CACHED_STACKS]); cached_stacks 196 kernel/fork.c struct vm_struct **cached_vm_stacks = per_cpu_ptr(cached_stacks, cpu); cached_stacks 222 kernel/fork.c s = this_cpu_xchg(cached_stacks[i], NULL); cached_stacks 285 kernel/fork.c if (this_cpu_cmpxchg(cached_stacks[i],