From: Mike Rapoport <rppt****@linux*****> There are no architectures that use include/asm-generic/5level-fixup.h therefore it can be removed along with __ARCH_HAS_5LEVEL_HACK define and the code it surrounds Signed-off-by: Mike Rapoport <rppt****@linux*****> --- include/asm-generic/5level-fixup.h | 58 ------------------------------ include/linux/mm.h | 6 ---- mm/kasan/init.c | 11 ------ mm/memory.c | 8 ----- 4 files changed, 83 deletions(-) delete mode 100644 include/asm-generic/5level-fixup.h diff --git a/include/asm-generic/5level-fixup.h b/include/asm-generic/5level-fixup.h deleted file mode 100644 index 4c74b1c1d13b..000000000000 --- a/include/asm-generic/5level-fixup.h +++ /dev/null @@ -1,58 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0 */ -#ifndef _5LEVEL_FIXUP_H -#define _5LEVEL_FIXUP_H - -#define __ARCH_HAS_5LEVEL_HACK -#define __PAGETABLE_P4D_FOLDED 1 - -#define P4D_SHIFT PGDIR_SHIFT -#define P4D_SIZE PGDIR_SIZE -#define P4D_MASK PGDIR_MASK -#define MAX_PTRS_PER_P4D 1 -#define PTRS_PER_P4D 1 - -#define p4d_t pgd_t - -#define pud_alloc(mm, p4d, address) \ - ((unlikely(pgd_none(*(p4d))) && __pud_alloc(mm, p4d, address)) ? \ - NULL : pud_offset(p4d, address)) - -#define p4d_alloc(mm, pgd, address) (pgd) -#define p4d_offset(pgd, start) (pgd) - -#ifndef __ASSEMBLY__ -static inline int p4d_none(p4d_t p4d) -{ - return 0; -} - -static inline int p4d_bad(p4d_t p4d) -{ - return 0; -} - -static inline int p4d_present(p4d_t p4d) -{ - return 1; -} -#endif - -#define p4d_ERROR(p4d) do { } while (0) -#define p4d_clear(p4d) pgd_clear(p4d) -#define p4d_val(p4d) pgd_val(p4d) -#define p4d_populate(mm, p4d, pud) pgd_populate(mm, p4d, pud) -#define p4d_populate_safe(mm, p4d, pud) pgd_populate(mm, p4d, pud) -#define p4d_page(p4d) pgd_page(p4d) -#define p4d_page_vaddr(p4d) pgd_page_vaddr(p4d) - -#define __p4d(x) __pgd(x) -#define set_p4d(p4dp, p4d) set_pgd(p4dp, p4d) - -#undef p4d_free_tlb -#define p4d_free_tlb(tlb, x, addr) do { } while (0) -#define p4d_free(mm, x) do { } while (0) - -#undef p4d_addr_end -#define p4d_addr_end(addr, end) (end) - -#endif diff --git a/include/linux/mm.h b/include/linux/mm.h index 52269e56c514..69fb46e1d91b 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -1841,11 +1841,6 @@ int __pte_alloc_kernel(pmd_t *pmd); #if defined(CONFIG_MMU) -/* - * The following ifdef needed to get the 5level-fixup.h header to work. - * Remove it when 5level-fixup.h has been removed. - */ -#ifndef __ARCH_HAS_5LEVEL_HACK static inline p4d_t *p4d_alloc(struct mm_struct *mm, pgd_t *pgd, unsigned long address) { @@ -1859,7 +1854,6 @@ static inline pud_t *pud_alloc(struct mm_struct *mm, p4d_t *p4d, return (unlikely(p4d_none(*p4d)) && __pud_alloc(mm, p4d, address)) ? NULL : pud_offset(p4d, address); } -#endif /* !__ARCH_HAS_5LEVEL_HACK */ static inline pmd_t *pmd_alloc(struct mm_struct *mm, pud_t *pud, unsigned long address) { diff --git a/mm/kasan/init.c b/mm/kasan/init.c index ce45c491ebcd..fe6be0be1f76 100644 --- a/mm/kasan/init.c +++ b/mm/kasan/init.c @@ -250,20 +250,9 @@ int __ref kasan_populate_early_shadow(const void *shadow_start, * 3,2 - level page tables where we don't have * puds,pmds, so pgd_populate(), pud_populate() * is noops. - * - * The ifndef is required to avoid build breakage. - * - * With 5level-fixup.h, pgd_populate() is not nop and - * we reference kasan_early_shadow_p4d. It's not defined - * unless 5-level paging enabled. - * - * The ifndef can be dropped once all KASAN-enabled - * architectures will switch to pgtable-nop4d.h. */ -#ifndef __ARCH_HAS_5LEVEL_HACK pgd_populate(&init_mm, pgd, lm_alias(kasan_early_shadow_p4d)); -#endif p4d = p4d_offset(pgd, addr); p4d_populate(&init_mm, p4d, lm_alias(kasan_early_shadow_pud)); diff --git a/mm/memory.c b/mm/memory.c index 0bccc622e482..10cc147db1b8 100644 --- a/mm/memory.c +++ b/mm/memory.c @@ -4252,19 +4252,11 @@ int __pud_alloc(struct mm_struct *mm, p4d_t *p4d, unsigned long address) smp_wmb(); /* See comment in __pte_alloc */ spin_lock(&mm->page_table_lock); -#ifndef __ARCH_HAS_5LEVEL_HACK if (!p4d_present(*p4d)) { mm_inc_nr_puds(mm); p4d_populate(mm, p4d, new); } else /* Another has populated it */ pud_free(mm, new); -#else - if (!pgd_present(*p4d)) { - mm_inc_nr_puds(mm); - pgd_populate(mm, p4d, new); - } else /* Another has populated it */ - pud_free(mm, new); -#endif /* __ARCH_HAS_5LEVEL_HACK */ spin_unlock(&mm->page_table_lock); return 0; } -- 2.24.0
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