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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>
This commit is contained in:
Alexandre Ghiti 2018-10-26 15:08:43 -07:00 committed by Linus Torvalds
parent facf6d5b8b
commit 544db7597a
11 changed files with 10 additions and 37 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
arch/arm/include/asm/hugetlb-3level.h
View File

@ -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;

3
arch/arm/include/asm/hugetlb.h
View File

@ -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)

1
arch/arm64/include/asm/hugetlb.h
View File

@ -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);

5
arch/ia64/include/asm/hugetlb.h
View File

@ -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)
{
}

5
arch/mips/include/asm/hugetlb.h
View File

@ -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)
{
}

5
arch/parisc/include/asm/hugetlb.h
View File

@ -48,11 +48,6 @@ int huge_ptep_set_access_flags(struct vm_area_struct *vma,
unsigned long addr, pte_t *ptep,
pte_t pte, int dirty);
static inline pte_t huge_ptep_get(pte_t *ptep)
{
return *ptep;
}
static inline void arch_clear_hugepage_flags(struct page *page)
{
}

5
arch/powerpc/include/asm/hugetlb.h
View File

@ -139,11 +139,6 @@ extern int huge_ptep_set_access_flags(struct vm_area_struct *vma,
unsigned long addr, pte_t *ptep,
pte_t pte, int dirty);
static inline pte_t huge_ptep_get(pte_t *ptep)
{
return *ptep;
}
static inline void arch_clear_hugepage_flags(struct page *page)
{
}

5
arch/sh/include/asm/hugetlb.h
View File

@ -32,11 +32,6 @@ 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)
{
clear_bit(PG_dcache_clean, &page->flags);

5
arch/sparc/include/asm/hugetlb.h
View File

@ -53,11 +53,6 @@ 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)
{
}

5
arch/x86/include/asm/hugetlb.h
View File

@ -13,11 +13,6 @@ static inline int is_hugepage_only_range(struct mm_struct *mm,
return 0;
}
static inline pte_t huge_ptep_get(pte_t *ptep)
{
return *ptep;
}
static inline void arch_clear_hugepage_flags(struct page *page)
{
}

7
include/asm-generic/hugetlb.h
View File

@ -119,4 +119,11 @@ static inline int huge_ptep_set_access_flags(struct vm_area_struct *vma,
}
#endif
#ifndef __HAVE_ARCH_HUGE_PTEP_GET
static inline pte_t huge_ptep_get(pte_t *ptep)
{
return *ptep;
}
#endif
#endif /* _ASM_GENERIC_HUGETLB_H */