early_pfn_lock   1457 mm/page_alloc.c 	static DEFINE_SPINLOCK(early_pfn_lock);
early_pfn_lock   1460 mm/page_alloc.c 	spin_lock(&early_pfn_lock);
early_pfn_lock   1464 mm/page_alloc.c 	spin_unlock(&early_pfn_lock);