suspend.c 619 B

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