hugetlbpage.c 678 B

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  1. // SPDX-License-Identifier: GPL-2.0-only
  2. /*
  3. * arch/arm/mm/hugetlbpage.c
  4. *
  5. * Copyright (C) 2012 ARM Ltd.
  6. *
  7. * Based on arch/x86/include/asm/hugetlb.h and Bill Carson's patches
  8. */
  9. #include <linux/init.h>
  10. #include <linux/fs.h>
  11. #include <linux/mm.h>
  12. #include <linux/hugetlb.h>
  13. #include <linux/pagemap.h>
  14. #include <linux/err.h>
  15. #include <linux/sysctl.h>
  16. #include <asm/mman.h>
  17. #include <asm/tlb.h>
  18. #include <asm/tlbflush.h>
  19. /*
  20. * On ARM, huge pages are backed by pmd's rather than pte's, so we do a lot
  21. * of type casting from pmd_t * to pte_t *.
  22. */
  23. int pud_huge(pud_t pud)
  24. {
  25. return 0;
  26. }
  27. int pmd_huge(pmd_t pmd)
  28. {
  29. return pmd_val(pmd) && !(pmd_val(pmd) & PMD_TABLE_BIT);
  30. }