linux/include/asm-generic/4level-fixup.h
Martin Schwidefsky a8874e7e8a mm: make the __PAGETABLE_PxD_FOLDED defines non-empty
Change the currently empty defines for __PAGETABLE_PMD_FOLDED,
__PAGETABLE_PUD_FOLDED and __PAGETABLE_P4D_FOLDED to return 1.
This makes it possible to use __is_defined() to test if the
preprocessor define exists.

Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2018-11-02 08:31:52 +01:00

41 lines
1.1 KiB
C

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _4LEVEL_FIXUP_H
#define _4LEVEL_FIXUP_H
#define __ARCH_HAS_4LEVEL_HACK
#define __PAGETABLE_PUD_FOLDED 1
#define PUD_SHIFT PGDIR_SHIFT
#define PUD_SIZE PGDIR_SIZE
#define PUD_MASK PGDIR_MASK
#define PTRS_PER_PUD 1
#define pud_t pgd_t
#define pmd_alloc(mm, pud, address) \
((unlikely(pgd_none(*(pud))) && __pmd_alloc(mm, pud, address))? \
NULL: pmd_offset(pud, address))
#define pud_offset(pgd, start) (pgd)
#define pud_none(pud) 0
#define pud_bad(pud) 0
#define pud_present(pud) 1
#define pud_ERROR(pud) do { } while (0)
#define pud_clear(pud) pgd_clear(pud)
#define pud_val(pud) pgd_val(pud)
#define pud_populate(mm, pud, pmd) pgd_populate(mm, pud, pmd)
#define pud_page(pud) pgd_page(pud)
#define pud_page_vaddr(pud) pgd_page_vaddr(pud)
#undef pud_free_tlb
#define pud_free_tlb(tlb, x, addr) do { } while (0)
#define pud_free(mm, x) do { } while (0)
#define __pud_free_tlb(tlb, x, addr) do { } while (0)
#undef pud_addr_end
#define pud_addr_end(addr, end) (end)
#include <asm-generic/5level-fixup.h>
#endif