start_kernel——

mm/highmem.c

void __init page_address_init(void)
{
    int i;

    for (i = 0; i < ARRAY_SIZE(page_address_htable); i++) {
        INIT_LIST_HEAD(&page_address_htable[i].lh);
        spin_lock_init(&page_address_htable[i].lock);
    }
}


/*
 * Hash table bucket
 */
static struct page_address_slot {
    struct list_head lh;            /* List of page_address_maps */
    spinlock_t lock;            /* Protect this bucket‘s list */
} ____cacheline_aligned_in_smp page_address_htable[1<<PA_HASH_ORDER];


#define PA_HASH_ORDER   7

对page_address_htable中的128个元素进行初始化。