boot_pfn_to_page
#define boot_pfn_to_page boot_pfn_to_page
#ifndef boot_pfn_to_page
free_reserved_page(boot_pfn_to_page(addr >> PAGE_SHIFT));
page = boot_pfn_to_page(entry >> PAGE_SHIFT);
old_page = boot_pfn_to_page(old_addr >> PAGE_SHIFT);
page = boot_pfn_to_page(maddr >> PAGE_SHIFT);