1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Suspend support specific for power. 4 * 5 * Copyright (c) 2002 Pavel Machek <pavel@ucw.cz> 6 * Copyright (c) 2001 Patrick Mochel <mochel@osdl.org> 7 */ 8 9 #include <linux/mm.h> 10 #include <asm/page.h> 11 #include <asm/sections.h> 12 13 /* 14 * pfn_is_nosave - check if given pfn is in the 'nosave' section 15 */ 16 17 int pfn_is_nosave(unsigned long pfn) 18 { 19 unsigned long nosave_begin_pfn = __pa(&__nosave_begin) >> PAGE_SHIFT; 20 unsigned long nosave_end_pfn = PAGE_ALIGN(__pa(&__nosave_end)) >> PAGE_SHIFT; 21 return (pfn >= nosave_begin_pfn) && (pfn < nosave_end_pfn); 22 } 23