The patch titled
Subject: mm/hugetlb: reduce arch dependent code about huge_pmd_unshare
has been added to the -mm tree. Its filename is
mm-hugetlb-reduce-arch-dependent-code-about-huge_pmd_unshare.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-hugetlb-reduce-arch-dependent-code-about-huge_pmd_unshare.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-hugetlb-reduce-arch-dependent-code-about-huge_pmd_unshare.patch
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------------------------------------------------------
From: Zhang Zhen <zhenzhang.zhang@xxxxxxxxxx>
Subject: mm/hugetlb: reduce arch dependent code about huge_pmd_unshare
Currently we have many duplicates in definitions of huge_pmd_unshare. In
all architectures this function just returns 0 when
CONFIG_ARCH_WANT_HUGE_PMD_SHARE is N.
This patch puts the default implementation in mm/hugetlb.c and lets these
architectures use the common code.
Signed-off-by: Zhang Zhen <zhenzhang.zhang@xxxxxxxxxx>
Cc: Russell King <linux@xxxxxxxxxxxxxxxx>
Cc: Catalin Marinas <catalin.marinas@xxxxxxx>
Cc: Tony Luck <tony.luck@xxxxxxxxx>
Cc: James Hogan <james.hogan@xxxxxxxxxx>
Cc: Ralf Baechle <ralf@xxxxxxxxxxxxxx>
Cc: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>
Cc: Martin Schwidefsky <schwidefsky@xxxxxxxxxx>
Cc: Chris Metcalf <cmetcalf@xxxxxxxxxx>
Cc: David Rientjes <rientjes@xxxxxxxxxx>
Cc: James Yang <James.Yang@xxxxxxxxxxxxx>
Cc: Aneesh Kumar <aneesh.kumar@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/arm/mm/hugetlbpage.c | 5 -----
arch/arm64/mm/hugetlbpage.c | 7 -------
arch/ia64/mm/hugetlbpage.c | 5 -----
arch/metag/mm/hugetlbpage.c | 5 -----
arch/mips/mm/hugetlbpage.c | 5 -----
arch/powerpc/mm/hugetlbpage.c | 5 -----
arch/s390/mm/hugetlbpage.c | 5 -----
arch/sh/mm/hugetlbpage.c | 5 -----
arch/sparc/mm/hugetlbpage.c | 5 -----
arch/tile/mm/hugetlbpage.c | 5 -----
mm/hugetlb.c | 5 +++++
11 files changed, 5 insertions(+), 52 deletions(-)
diff -puN arch/arm/mm/hugetlbpage.c~mm-hugetlb-reduce-arch-dependent-code-about-huge_pmd_unshare arch/arm/mm/hugetlbpage.c
--- a/arch/arm/mm/hugetlbpage.c~mm-hugetlb-reduce-arch-dependent-code-about-huge_pmd_unshare
+++ a/arch/arm/mm/hugetlbpage.c
@@ -41,11 +41,6 @@ int pud_huge(pud_t pud)
return 0;
}
-int huge_pmd_unshare(struct mm_struct *mm, unsigned long *addr, pte_t *ptep)
-{
- return 0;
-}
-
int pmd_huge(pmd_t pmd)
{
return pmd_val(pmd) && !(pmd_val(pmd) & PMD_TABLE_BIT);
diff -puN arch/arm64/mm/hugetlbpage.c~mm-hugetlb-reduce-arch-dependent-code-about-huge_pmd_unshare arch/arm64/mm/hugetlbpage.c
--- a/arch/arm64/mm/hugetlbpage.c~mm-hugetlb-reduce-arch-dependent-code-about-huge_pmd_unshare
+++ a/arch/arm64/mm/hugetlbpage.c
@@ -31,13 +31,6 @@
#include <asm/tlbflush.h>
#include <asm/pgalloc.h>
-#ifndef CONFIG_ARCH_WANT_HUGE_PMD_SHARE
-int huge_pmd_unshare(struct mm_struct *mm, unsigned long *addr, pte_t *ptep)
-{
- return 0;
-}
-#endif
-
int pmd_huge(pmd_t pmd)
{
return !(pmd_val(pmd) & PMD_TABLE_BIT);
diff -puN arch/ia64/mm/hugetlbpage.c~mm-hugetlb-reduce-arch-dependent-code-about-huge_pmd_unshare arch/ia64/mm/hugetlbpage.c
--- a/arch/ia64/mm/hugetlbpage.c~mm-hugetlb-reduce-arch-dependent-code-about-huge_pmd_unshare
+++ a/arch/ia64/mm/hugetlbpage.c
@@ -65,11 +65,6 @@ huge_pte_offset (struct mm_struct *mm, u
return pte;
}
-int huge_pmd_unshare(struct mm_struct *mm, unsigned long *addr, pte_t *ptep)
-{
- return 0;
-}
-
#define mk_pte_huge(entry) { pte_val(entry) |= _PAGE_P; }
/*
diff -puN arch/metag/mm/hugetlbpage.c~mm-hugetlb-reduce-arch-dependent-code-about-huge_pmd_unshare arch/metag/mm/hugetlbpage.c
--- a/arch/metag/mm/hugetlbpage.c~mm-hugetlb-reduce-arch-dependent-code-about-huge_pmd_unshare
+++ a/arch/metag/mm/hugetlbpage.c
@@ -89,11 +89,6 @@ pte_t *huge_pte_offset(struct mm_struct
return pte;
}
-int huge_pmd_unshare(struct mm_struct *mm, unsigned long *addr, pte_t *ptep)
-{
- return 0;
-}
-
int pmd_huge(pmd_t pmd)
{
return pmd_page_shift(pmd) > PAGE_SHIFT;
diff -puN arch/mips/mm/hugetlbpage.c~mm-hugetlb-reduce-arch-dependent-code-about-huge_pmd_unshare arch/mips/mm/hugetlbpage.c
--- a/arch/mips/mm/hugetlbpage.c~mm-hugetlb-reduce-arch-dependent-code-about-huge_pmd_unshare
+++ a/arch/mips/mm/hugetlbpage.c
@@ -51,11 +51,6 @@ pte_t *huge_pte_offset(struct mm_struct
return (pte_t *) pmd;
}
-int huge_pmd_unshare(struct mm_struct *mm, unsigned long *addr, pte_t *ptep)
-{
- return 0;
-}
-
/*
* This function checks for proper alignment of input addr and len parameters.
*/
diff -puN arch/powerpc/mm/hugetlbpage.c~mm-hugetlb-reduce-arch-dependent-code-about-huge_pmd_unshare arch/powerpc/mm/hugetlbpage.c
--- a/arch/powerpc/mm/hugetlbpage.c~mm-hugetlb-reduce-arch-dependent-code-about-huge_pmd_unshare
+++ a/arch/powerpc/mm/hugetlbpage.c
@@ -439,11 +439,6 @@ int alloc_bootmem_huge_page(struct hstat
}
#endif
-int huge_pmd_unshare(struct mm_struct *mm, unsigned long *addr, pte_t *ptep)
-{
- return 0;
-}
-
#ifdef CONFIG_PPC_FSL_BOOK3E
#define HUGEPD_FREELIST_SIZE \
((PAGE_SIZE - sizeof(struct hugepd_freelist)) / sizeof(pte_t))
diff -puN arch/s390/mm/hugetlbpage.c~mm-hugetlb-reduce-arch-dependent-code-about-huge_pmd_unshare arch/s390/mm/hugetlbpage.c
--- a/arch/s390/mm/hugetlbpage.c~mm-hugetlb-reduce-arch-dependent-code-about-huge_pmd_unshare
+++ a/arch/s390/mm/hugetlbpage.c
@@ -187,11 +187,6 @@ pte_t *huge_pte_offset(struct mm_struct
return (pte_t *) pmdp;
}
-int huge_pmd_unshare(struct mm_struct *mm, unsigned long *addr, pte_t *ptep)
-{
- return 0;
-}
-
int pmd_huge(pmd_t pmd)
{
if (!MACHINE_HAS_HPAGE)
diff -puN arch/sh/mm/hugetlbpage.c~mm-hugetlb-reduce-arch-dependent-code-about-huge_pmd_unshare arch/sh/mm/hugetlbpage.c
--- a/arch/sh/mm/hugetlbpage.c~mm-hugetlb-reduce-arch-dependent-code-about-huge_pmd_unshare
+++ a/arch/sh/mm/hugetlbpage.c
@@ -62,11 +62,6 @@ pte_t *huge_pte_offset(struct mm_struct
return pte;
}
-int huge_pmd_unshare(struct mm_struct *mm, unsigned long *addr, pte_t *ptep)
-{
- return 0;
-}
-
int pmd_huge(pmd_t pmd)
{
return 0;
diff -puN arch/sparc/mm/hugetlbpage.c~mm-hugetlb-reduce-arch-dependent-code-about-huge_pmd_unshare arch/sparc/mm/hugetlbpage.c
--- a/arch/sparc/mm/hugetlbpage.c~mm-hugetlb-reduce-arch-dependent-code-about-huge_pmd_unshare
+++ a/arch/sparc/mm/hugetlbpage.c
@@ -172,11 +172,6 @@ pte_t *huge_pte_offset(struct mm_struct
return pte;
}
-int huge_pmd_unshare(struct mm_struct *mm, unsigned long *addr, pte_t *ptep)
-{
- return 0;
-}
-
void set_huge_pte_at(struct mm_struct *mm, unsigned long addr,
pte_t *ptep, pte_t entry)
{
diff -puN arch/tile/mm/hugetlbpage.c~mm-hugetlb-reduce-arch-dependent-code-about-huge_pmd_unshare arch/tile/mm/hugetlbpage.c
--- a/arch/tile/mm/hugetlbpage.c~mm-hugetlb-reduce-arch-dependent-code-about-huge_pmd_unshare
+++ a/arch/tile/mm/hugetlbpage.c
@@ -160,11 +160,6 @@ int pud_huge(pud_t pud)
return !!(pud_val(pud) & _PAGE_HUGE_PAGE);
}
-int huge_pmd_unshare(struct mm_struct *mm, unsigned long *addr, pte_t *ptep)
-{
- return 0;
-}
-
#ifdef HAVE_ARCH_HUGETLB_UNMAPPED_AREA
static unsigned long hugetlb_get_unmapped_area_bottomup(struct file *file,
unsigned long addr, unsigned long len,
diff -puN mm/hugetlb.c~mm-hugetlb-reduce-arch-dependent-code-about-huge_pmd_unshare mm/hugetlb.c
--- a/mm/hugetlb.c~mm-hugetlb-reduce-arch-dependent-code-about-huge_pmd_unshare
+++ a/mm/hugetlb.c
@@ -3789,6 +3789,11 @@ pte_t *huge_pmd_share(struct mm_struct *
{
return NULL;
}
+
+int huge_pmd_unshare(struct mm_struct *mm, unsigned long *addr, pte_t *ptep)
+{
+ return 0;
+}
#define want_pmd_share() (0)
#endif /* CONFIG_ARCH_WANT_HUGE_PMD_SHARE */
_
Patches currently in -mm which might be from zhenzhang.zhang@xxxxxxxxxx are
origin.patch
mm-hugetlb-reduce-arch-dependent-code-about-huge_pmd_unshare.patch
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