| // SPDX-License-Identifier: GPL-2.0-only |
| /* |
| * Suspend support specific for power. |
| * |
| * Copyright (c) 2002 Pavel Machek <pavel@ucw.cz> |
| * Copyright (c) 2001 Patrick Mochel <mochel@osdl.org> |
| */ |
| |
| #include <linux/mm.h> |
| #include <linux/suspend.h> |
| #include <asm/page.h> |
| #include <asm/sections.h> |
| |
| /* |
| * pfn_is_nosave - check if given pfn is in the 'nosave' section |
| */ |
| |
| int pfn_is_nosave(unsigned long pfn) |
| { |
| unsigned long nosave_begin_pfn = __pa(&__nosave_begin) >> PAGE_SHIFT; |
| unsigned long nosave_end_pfn = PAGE_ALIGN(__pa(&__nosave_end)) >> PAGE_SHIFT; |
| return (pfn >= nosave_begin_pfn) && (pfn < nosave_end_pfn); |
| } |
