The patch titled
Subject: mm: switch to 'define pmd_write' instead of __HAVE_ARCH_PMD_WRITE
has been added to the -mm tree. Its filename is
mm-switch-to-define-pmd_write-instead-of-__have_arch_pmd_write.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-switch-to-define-pmd_write-instead-of-__have_arch_pmd_write.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-switch-to-define-pmd_write-instead-of-__have_arch_pmd_write.patch
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------------------------------------------------------
From: Dan Williams <dan.j.williams@xxxxxxxxx>
Subject: mm: switch to 'define pmd_write' instead of __HAVE_ARCH_PMD_WRITE
In response to compile breakage introduced by a series that added the
pud_write helper to x86, Stephen notes:
did you consider using the other paradigm:
In arch include files:
#define pud_write pud_write
static inline int pud_write(pud_t pud)
.....
Then in include/asm-generic/pgtable.h:
#ifndef pud_write
tatic inline int pud_write(pud_t pud)
{
....
}
#endif
If you had, then the powerpc code would have worked ... ;-) and many
of the other interfaces in include/asm-generic/pgtable.h are
protected that way ...
Given that some architecture already define pmd_write() as a macro, it's a
net reduction to drop the definition of __HAVE_ARCH_PMD_WRITE.
Link: http://lkml.kernel.org/r/151129126721.37405.13339850900081557813.stgit@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Signed-off-by: Dan Williams <dan.j.williams@xxxxxxxxx>
Suggested-by: Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx>
Cc: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>
Cc: Chris Metcalf <cmetcalf@xxxxxxxxxxxx>
Cc: Russell King <linux@xxxxxxxxxxxxxxx>
Cc: Ralf Baechle <ralf@xxxxxxxxxxxxxx>
Cc: "H. Peter Anvin" <hpa@xxxxxxxxx>
Cc: Arnd Bergmann <arnd@xxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/arm/include/asm/pgtable-3level.h | 1 -
arch/arm64/include/asm/pgtable.h | 1 -
arch/mips/include/asm/pgtable.h | 2 +-
arch/powerpc/include/asm/book3s/64/pgtable.h | 1 -
arch/s390/include/asm/pgtable.h | 2 +-
arch/sparc/include/asm/pgtable_64.h | 2 +-
arch/tile/include/asm/pgtable.h | 1 -
arch/x86/include/asm/pgtable.h | 2 +-
include/asm-generic/pgtable.h | 4 ++--
9 files changed, 6 insertions(+), 10 deletions(-)
diff -puN arch/arm64/include/asm/pgtable.h~mm-switch-to-define-pmd_write-instead-of-__have_arch_pmd_write arch/arm64/include/asm/pgtable.h
--- a/arch/arm64/include/asm/pgtable.h~mm-switch-to-define-pmd_write-instead-of-__have_arch_pmd_write
+++ a/arch/arm64/include/asm/pgtable.h
@@ -345,7 +345,6 @@ static inline int pmd_protnone(pmd_t pmd
#define pmd_thp_or_huge(pmd) (pmd_huge(pmd) || pmd_trans_huge(pmd))
-#define __HAVE_ARCH_PMD_WRITE
#define pmd_write(pmd) pte_write(pmd_pte(pmd))
#define pmd_mkhuge(pmd) (__pmd(pmd_val(pmd) & ~PMD_TABLE_BIT))
diff -puN arch/arm/include/asm/pgtable-3level.h~mm-switch-to-define-pmd_write-instead-of-__have_arch_pmd_write arch/arm/include/asm/pgtable-3level.h
--- a/arch/arm/include/asm/pgtable-3level.h~mm-switch-to-define-pmd_write-instead-of-__have_arch_pmd_write
+++ a/arch/arm/include/asm/pgtable-3level.h
@@ -221,7 +221,6 @@ static inline pte_t pte_mkspecial(pte_t
}
#define __HAVE_ARCH_PTE_SPECIAL
-#define __HAVE_ARCH_PMD_WRITE
#define pmd_write(pmd) (pmd_isclear((pmd), L_PMD_SECT_RDONLY))
#define pmd_dirty(pmd) (pmd_isset((pmd), L_PMD_SECT_DIRTY))
#define pud_page(pud) pmd_page(__pmd(pud_val(pud)))
diff -puN arch/mips/include/asm/pgtable.h~mm-switch-to-define-pmd_write-instead-of-__have_arch_pmd_write arch/mips/include/asm/pgtable.h
--- a/arch/mips/include/asm/pgtable.h~mm-switch-to-define-pmd_write-instead-of-__have_arch_pmd_write
+++ a/arch/mips/include/asm/pgtable.h
@@ -552,7 +552,7 @@ static inline pmd_t pmd_mkhuge(pmd_t pmd
extern void set_pmd_at(struct mm_struct *mm, unsigned long addr,
pmd_t *pmdp, pmd_t pmd);
-#define __HAVE_ARCH_PMD_WRITE
+#define pmd_write pmd_write
static inline int pmd_write(pmd_t pmd)
{
return !!(pmd_val(pmd) & _PAGE_WRITE);
diff -puN arch/powerpc/include/asm/book3s/64/pgtable.h~mm-switch-to-define-pmd_write-instead-of-__have_arch_pmd_write arch/powerpc/include/asm/book3s/64/pgtable.h
--- a/arch/powerpc/include/asm/book3s/64/pgtable.h~mm-switch-to-define-pmd_write-instead-of-__have_arch_pmd_write
+++ a/arch/powerpc/include/asm/book3s/64/pgtable.h
@@ -1005,7 +1005,6 @@ static inline int pmd_protnone(pmd_t pmd
}
#endif /* CONFIG_NUMA_BALANCING */
-#define __HAVE_ARCH_PMD_WRITE
#define pmd_write(pmd) pte_write(pmd_pte(pmd))
#define __pmd_write(pmd) __pte_write(pmd_pte(pmd))
#define pmd_savedwrite(pmd) pte_savedwrite(pmd_pte(pmd))
diff -puN arch/s390/include/asm/pgtable.h~mm-switch-to-define-pmd_write-instead-of-__have_arch_pmd_write arch/s390/include/asm/pgtable.h
--- a/arch/s390/include/asm/pgtable.h~mm-switch-to-define-pmd_write-instead-of-__have_arch_pmd_write
+++ a/arch/s390/include/asm/pgtable.h
@@ -709,7 +709,7 @@ static inline unsigned long pmd_pfn(pmd_
return (pmd_val(pmd) & origin_mask) >> PAGE_SHIFT;
}
-#define __HAVE_ARCH_PMD_WRITE
+#define pmd_write pmd_write
static inline int pmd_write(pmd_t pmd)
{
return (pmd_val(pmd) & _SEGMENT_ENTRY_WRITE) != 0;
diff -puN arch/sparc/include/asm/pgtable_64.h~mm-switch-to-define-pmd_write-instead-of-__have_arch_pmd_write arch/sparc/include/asm/pgtable_64.h
--- a/arch/sparc/include/asm/pgtable_64.h~mm-switch-to-define-pmd_write-instead-of-__have_arch_pmd_write
+++ a/arch/sparc/include/asm/pgtable_64.h
@@ -715,7 +715,7 @@ static inline unsigned long pmd_pfn(pmd_
return pte_pfn(pte);
}
-#define __HAVE_ARCH_PMD_WRITE
+#define pmd_write pmd_write
static inline unsigned long pmd_write(pmd_t pmd)
{
pte_t pte = __pte(pmd_val(pmd));
diff -puN arch/tile/include/asm/pgtable.h~mm-switch-to-define-pmd_write-instead-of-__have_arch_pmd_write arch/tile/include/asm/pgtable.h
--- a/arch/tile/include/asm/pgtable.h~mm-switch-to-define-pmd_write-instead-of-__have_arch_pmd_write
+++ a/arch/tile/include/asm/pgtable.h
@@ -475,7 +475,6 @@ static inline void pmd_clear(pmd_t *pmdp
#define pmd_mkdirty(pmd) pte_pmd(pte_mkdirty(pmd_pte(pmd)))
#define pmd_huge_page(pmd) pte_huge(pmd_pte(pmd))
#define pmd_mkhuge(pmd) pte_pmd(pte_mkhuge(pmd_pte(pmd)))
-#define __HAVE_ARCH_PMD_WRITE
#define pfn_pmd(pfn, pgprot) pte_pmd(pfn_pte((pfn), (pgprot)))
#define pmd_pfn(pmd) pte_pfn(pmd_pte(pmd))
diff -puN arch/x86/include/asm/pgtable.h~mm-switch-to-define-pmd_write-instead-of-__have_arch_pmd_write arch/x86/include/asm/pgtable.h
--- a/arch/x86/include/asm/pgtable.h~mm-switch-to-define-pmd_write-instead-of-__have_arch_pmd_write
+++ a/arch/x86/include/asm/pgtable.h
@@ -1061,7 +1061,7 @@ extern int pmdp_clear_flush_young(struct
unsigned long address, pmd_t *pmdp);
-#define __HAVE_ARCH_PMD_WRITE
+#define pmd_write pmd_write
static inline int pmd_write(pmd_t pmd)
{
return pmd_flags(pmd) & _PAGE_RW;
diff -puN include/asm-generic/pgtable.h~mm-switch-to-define-pmd_write-instead-of-__have_arch_pmd_write include/asm-generic/pgtable.h
--- a/include/asm-generic/pgtable.h~mm-switch-to-define-pmd_write-instead-of-__have_arch_pmd_write
+++ a/include/asm-generic/pgtable.h
@@ -805,13 +805,13 @@ static inline int pmd_trans_huge(pmd_t p
{
return 0;
}
-#ifndef __HAVE_ARCH_PMD_WRITE
+#ifndef pmd_write
static inline int pmd_write(pmd_t pmd)
{
BUG();
return 0;
}
-#endif /* __HAVE_ARCH_PMD_WRITE */
+#endif /* pmd_write */
#endif /* CONFIG_TRANSPARENT_HUGEPAGE */
#ifndef pud_write
_
Patches currently in -mm which might be from dan.j.williams@xxxxxxxxx are
mm-fix-device-dax-pud-write-faults-triggered-by-get_user_pages.patch
mm-fix-device-dax-pud-write-faults-triggered-by-get_user_pages-v3.patch
mm-switch-to-define-pmd_write-instead-of-__have_arch_pmd_write.patch
mm-replace-pud_write-with-pud_access_permitted-in-fault-gup-paths.patch
mm-replace-pud_write-with-pud_access_permitted-in-fault-gup-paths-v3.patch
mm-replace-pmd_write-with-pmd_access_permitted-in-fault-gup-paths.patch
mm-replace-pte_write-with-pte_access_permitted-in-fault-gup-paths.patch
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