LXR linux/arch/powerpc/kernel/suspend.c

   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 <linux/suspend.h>
  11#include <asm/page.h>
  12#include <asm/sections.h>
  13
  14/*
  15 *      pfn_is_nosave - check if given pfn is in the 'nosave' section
  16 */
  17
  18int pfn_is_nosave(unsigned long pfn)
  19{
  20        unsigned long nosave_begin_pfn = __pa(&__nosave_begin) >> PAGE_SHIFT;
  21        unsigned long nosave_end_pfn = PAGE_ALIGN(__pa(&__nosave_end)) >> PAGE_SHIFT;
  22        return (pfn >= nosave_begin_pfn) && (pfn < nosave_end_pfn);
  23}
  24