Commit 544db759 authored Oct 26, 2018 by Alexandre Ghiti Committed by Linus Torvalds Oct 26, 2018

hugetlb: introduce generic version of huge_ptep_get

ia64, mips, parisc, powerpc, sh, sparc, x86 architectures use the same
version of huge_ptep_get, so move this generic implementation into
asm-generic/hugetlb.h.

[arnd@arndb.de: fix ARM 3level page tables]
  Link: http://lkml.kernel.org/r/20181005161722.904274-1-arnd@arndb.de
Link: http://lkml.kernel.org/r/20180920060358.16606-12-alex@ghiti.fr


Signed-off-by: Alexandre Ghiti <alex@ghiti.fr>
Reviewed-by: Luiz Capitulino <lcapitulino@redhat.com>
Reviewed-by: Mike Kravetz <mike.kravetz@oracle.com>
Tested-by: Helge Deller <deller@gmx.de>			[parisc]
Acked-by: Catalin Marinas <catalin.marinas@arm.com>	[arm64]
Acked-by: Paul Burton <paul.burton@mips.com>		[MIPS]
Acked-by: Ingo Molnar <mingo@kernel.org>		[x86]
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: David S. Miller <davem@davemloft.net>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James E.J. Bottomley <jejb@parisc-linux.org>
Cc: James Hogan <jhogan@kernel.org>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Rich Felker <dalias@libc.org>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

parent facf6d5b

arch/arm/include/asm/hugetlb-3level.h

+1 −0

Original line number	Diff line number	Diff line
		@@ -29,6 +29,7 @@
		* ptes.
		* (The valid bit is automatically cleared by set_pte_at for PROT_NONE ptes).
		*/
		#define __HAVE_ARCH_HUGE_PTEP_GET
		static inline pte_t huge_ptep_get(pte_t *ptep)
		{
		pte_t retval = *ptep;

arch/arm/include/asm/hugetlb.h

+1 −2

Original line number	Diff line number	Diff line
		@@ -23,9 +23,8 @@
		#define _ASM_ARM_HUGETLB_H

		#include <asm/page.h>
		#include <asm-generic/hugetlb.h>

		#include <asm/hugetlb-3level.h>
		#include <asm-generic/hugetlb.h>

		static inline int is_hugepage_only_range(struct mm_struct *mm,
		unsigned long addr, unsigned long len)

arch/arm64/include/asm/hugetlb.h

+1 −0

Original line number	Diff line number	Diff line
		@@ -20,6 +20,7 @@

		#include <asm/page.h>

		#define __HAVE_ARCH_HUGE_PTEP_GET
		static inline pte_t huge_ptep_get(pte_t *ptep)
		{
		return READ_ONCE(*ptep);

arch/ia64/include/asm/hugetlb.h

+0 −5

Original line number	Diff line number	Diff line
		@@ -27,11 +27,6 @@ static inline void huge_ptep_clear_flush(struct vm_area_struct *vma,
		{
		}

		static inline pte_t huge_ptep_get(pte_t *ptep)
		{
		return *ptep;
		}

		static inline void arch_clear_hugepage_flags(struct page *page)
		{
		}

arch/mips/include/asm/hugetlb.h

+0 −5

Original line number	Diff line number	Diff line
		@@ -82,11 +82,6 @@ static inline int huge_ptep_set_access_flags(struct vm_area_struct *vma,
		return changed;
		}

		static inline pte_t huge_ptep_get(pte_t *ptep)
		{
		return *ptep;
		}

		static inline void arch_clear_hugepage_flags(struct page *page)
		{
		}

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