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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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a8874e7e8a
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>
43 lines
1.2 KiB
C
43 lines
1.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _5LEVEL_FIXUP_H
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#define _5LEVEL_FIXUP_H
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#define __ARCH_HAS_5LEVEL_HACK
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#define __PAGETABLE_P4D_FOLDED 1
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#define P4D_SHIFT PGDIR_SHIFT
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#define P4D_SIZE PGDIR_SIZE
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#define P4D_MASK PGDIR_MASK
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#define MAX_PTRS_PER_P4D 1
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#define PTRS_PER_P4D 1
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#define p4d_t pgd_t
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#define pud_alloc(mm, p4d, address) \
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((unlikely(pgd_none(*(p4d))) && __pud_alloc(mm, p4d, address)) ? \
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NULL : pud_offset(p4d, address))
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#define p4d_alloc(mm, pgd, address) (pgd)
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#define p4d_offset(pgd, start) (pgd)
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#define p4d_none(p4d) 0
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#define p4d_bad(p4d) 0
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#define p4d_present(p4d) 1
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#define p4d_ERROR(p4d) do { } while (0)
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#define p4d_clear(p4d) pgd_clear(p4d)
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#define p4d_val(p4d) pgd_val(p4d)
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#define p4d_populate(mm, p4d, pud) pgd_populate(mm, p4d, pud)
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#define p4d_page(p4d) pgd_page(p4d)
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#define p4d_page_vaddr(p4d) pgd_page_vaddr(p4d)
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#define __p4d(x) __pgd(x)
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#define set_p4d(p4dp, p4d) set_pgd(p4dp, p4d)
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#undef p4d_free_tlb
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#define p4d_free_tlb(tlb, x, addr) do { } while (0)
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#define p4d_free(mm, x) do { } while (0)
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#define __p4d_free_tlb(tlb, x, addr) do { } while (0)
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#undef p4d_addr_end
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#define p4d_addr_end(addr, end) (end)
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#endif
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