e025ab842e
Most architectures (except arm64/x86/sparc) simply return 1 for kern_addr_valid(), which is only used in read_kcore(), and it calls copy_from_kernel_nofault() which could check whether the address is a valid kernel address. So as there is no need for kern_addr_valid(), let's remove it. Link: https://lkml.kernel.org/r/20221018074014.185687-1-wangkefeng.wang@huawei.com Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> [m68k] Acked-by: Heiko Carstens <hca@linux.ibm.com> [s390] Acked-by: Christoph Hellwig <hch@lst.de> Acked-by: Helge Deller <deller@gmx.de> [parisc] Acked-by: Michael Ellerman <mpe@ellerman.id.au> [powerpc] Acked-by: Guo Ren <guoren@kernel.org> [csky] Acked-by: Catalin Marinas <catalin.marinas@arm.com> [arm64] Cc: Alexander Gordeev <agordeev@linux.ibm.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Anton Ivanov <anton.ivanov@cambridgegreys.com> Cc: <aou@eecs.berkeley.edu> Cc: Borislav Petkov <bp@alien8.de> Cc: Christian Borntraeger <borntraeger@linux.ibm.com> Cc: Christophe Leroy <christophe.leroy@csgroup.eu> Cc: Chris Zankel <chris@zankel.net> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: David S. Miller <davem@davemloft.net> Cc: Dinh Nguyen <dinguyen@kernel.org> Cc: Greg Ungerer <gerg@linux-m68k.org> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huacai Chen <chenhuacai@kernel.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: James Bottomley <James.Bottomley@HansenPartnership.com> Cc: Johannes Berg <johannes@sipsolutions.net> Cc: Jonas Bonn <jonas@southpole.se> Cc: Matt Turner <mattst88@gmail.com> Cc: Max Filippov <jcmvbkbc@gmail.com> Cc: Michal Simek <monstr@monstr.eu> Cc: Nicholas Piggin <npiggin@gmail.com> Cc: Palmer Dabbelt <palmer@rivosinc.com> Cc: Paul Walmsley <paul.walmsley@sifive.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Richard Henderson <richard.henderson@linaro.org> Cc: Richard Weinberger <richard@nod.at> Cc: Rich Felker <dalias@libc.org> Cc: Russell King <linux@armlinux.org.uk> Cc: Stafford Horne <shorne@gmail.com> Cc: Stefan Kristiansson <stefan.kristiansson@saunalahti.fi> Cc: Sven Schnelle <svens@linux.ibm.com> Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vasily Gorbik <gor@linux.ibm.com> Cc: Vineet Gupta <vgupta@kernel.org> Cc: Will Deacon <will@kernel.org> Cc: Xuerui Wang <kernel@xen0n.name> Cc: Yoshinori Sato <ysato@users.osdn.me> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
56 lines
1.4 KiB
C
56 lines
1.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _M68KNOMMU_PGTABLE_H
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#define _M68KNOMMU_PGTABLE_H
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#include <asm-generic/pgtable-nopud.h>
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/*
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* (C) Copyright 2000-2002, Greg Ungerer <gerg@snapgear.com>
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*/
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#include <linux/slab.h>
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#include <asm/processor.h>
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#include <asm/page.h>
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#include <asm/io.h>
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/*
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* Trivial page table functions.
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*/
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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 pmd_offset(a, b) ((void *)0)
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#define PAGE_NONE __pgprot(0)
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#define PAGE_SHARED __pgprot(0)
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#define PAGE_COPY __pgprot(0)
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#define PAGE_READONLY __pgprot(0)
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#define PAGE_KERNEL __pgprot(0)
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extern void paging_init(void);
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#define swapper_pg_dir ((pgd_t *) 0)
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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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/*
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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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extern void *empty_zero_page;
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#define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page))
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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 KMAP_START 0
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#define KMAP_END 0xffffffff
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#endif /* _M68KNOMMU_PGTABLE_H */
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