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782de70c42
Both pgtable_cache_init() and pgd_cache_init() are used to initialize kmem cache for page table allocations on several architectures that do not use PAGE_SIZE tables for one or more levels of the page table hierarchy. Most architectures do not implement these functions and use __weak default NOP implementation of pgd_cache_init(). Since there is no such default for pgtable_cache_init(), its empty stub is duplicated among most architectures. Rename the definitions of pgd_cache_init() to pgtable_cache_init() and drop empty stubs of pgtable_cache_init(). Link: http://lkml.kernel.org/r/1566457046-22637-1-git-send-email-rppt@linux.ibm.com Signed-off-by: Mike Rapoport <rppt@linux.ibm.com> Acked-by: Will Deacon <will@kernel.org> [arm64] Acked-by: Thomas Gleixner <tglx@linutronix.de> [x86] Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Matthew Wilcox <willy@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
70 lines
2.1 KiB
C
70 lines
2.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Port on Texas Instruments TMS320C6x architecture
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*
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* Copyright (C) 2004, 2009, 2010 Texas Instruments Incorporated
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* Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com)
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*/
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#ifndef _ASM_C6X_PGTABLE_H
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#define _ASM_C6X_PGTABLE_H
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#include <asm-generic/4level-fixup.h>
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#include <asm/setup.h>
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#include <asm/page.h>
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/*
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* All 32bit addresses are effectively valid for vmalloc...
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* Sort of meaningless for non-VM targets.
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*/
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#define VMALLOC_START 0
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#define VMALLOC_END 0xffffffff
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#define pgd_present(pgd) (1)
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#define pgd_none(pgd) (0)
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#define pgd_bad(pgd) (0)
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#define pgd_clear(pgdp)
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#define kern_addr_valid(addr) (1)
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#define pmd_offset(a, b) ((void *)0)
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#define pmd_none(x) (!pmd_val(x))
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#define pmd_present(x) (pmd_val(x))
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#define pmd_clear(xp) do { set_pmd(xp, __pmd(0)); } while (0)
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#define pmd_bad(x) (pmd_val(x) & ~PAGE_MASK)
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#define PAGE_NONE __pgprot(0) /* these mean nothing to NO_MM */
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#define PAGE_SHARED __pgprot(0) /* these mean nothing to NO_MM */
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#define PAGE_COPY __pgprot(0) /* these mean nothing to NO_MM */
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#define PAGE_READONLY __pgprot(0) /* these mean nothing to NO_MM */
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#define PAGE_KERNEL __pgprot(0) /* these mean nothing to NO_MM */
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#define pgprot_noncached(prot) (prot)
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extern void paging_init(void);
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#define __swp_type(x) (0)
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#define __swp_offset(x) (0)
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#define __swp_entry(typ, off) ((swp_entry_t) { ((typ) | ((off) << 7)) })
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#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) })
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#define __swp_entry_to_pte(x) ((pte_t) { (x).val })
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#define set_pte(pteptr, pteval) (*(pteptr) = pteval)
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#define set_pte_at(mm, addr, ptep, pteval) set_pte(ptep, pteval)
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/*
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* ZERO_PAGE is a global shared page that is always zero: used
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* for zero-mapped memory areas etc..
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*/
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#define ZERO_PAGE(vaddr) virt_to_page(empty_zero_page)
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extern unsigned long empty_zero_page;
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#define swapper_pg_dir ((pgd_t *) 0)
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/*
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* c6x is !MMU, so define the simpliest implementation
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*/
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#define pgprot_writecombine pgprot_noncached
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#include <asm-generic/pgtable.h>
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#endif /* _ASM_C6X_PGTABLE_H */
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