The patch titled
Subject: mm-fix-device-dax-pud-write-faults-triggered-by-get_user_pages-v3
has been added to the -mm tree. Its filename is
mm-fix-device-dax-pud-write-faults-triggered-by-get_user_pages-v3.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-fix-device-dax-pud-write-faults-triggered-by-get_user_pages-v3.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-fix-device-dax-pud-write-faults-triggered-by-get_user_pages-v3.patch
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------------------------------------------------------
From: Dan Williams <dan.j.williams@xxxxxxxxx>
Subject: mm-fix-device-dax-pud-write-faults-triggered-by-get_user_pages-v3
* Switch from the "#define __HAVE_ARCH_PUD_WRITE" to "#define
pud_write". This incidentally fixes a powerpc compile error.
(Stephen)
Link: http://lkml.kernel.org/r/151129126165.37405.16031785266675461397.stgit@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Fixes: a00cc7d9dd93 ("mm, x86: add support for PUD-sized transparent hugepages")
Signed-off-by: Dan Williams <dan.j.williams@xxxxxxxxx>
Reported-by: Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/arm64/include/asm/pgtable.h | 1 -
arch/sparc/include/asm/pgtable_64.h | 1 -
arch/x86/include/asm/pgtable.h | 2 +-
include/asm-generic/pgtable.h | 7 +++----
4 files changed, 4 insertions(+), 7 deletions(-)
diff -puN arch/arm64/include/asm/pgtable.h~mm-fix-device-dax-pud-write-faults-triggered-by-get_user_pages-v3 arch/arm64/include/asm/pgtable.h
--- a/arch/arm64/include/asm/pgtable.h~mm-fix-device-dax-pud-write-faults-triggered-by-get_user_pages-v3
+++ a/arch/arm64/include/asm/pgtable.h
@@ -354,7 +354,6 @@ static inline int pmd_protnone(pmd_t pmd
#define pfn_pmd(pfn,prot) (__pmd(((phys_addr_t)(pfn) << PAGE_SHIFT) | pgprot_val(prot)))
#define mk_pmd(page,prot) pfn_pmd(page_to_pfn(page),prot)
-#define __HAVE_ARCH_PUD_WRITE
#define pud_write(pud) pte_write(pud_pte(pud))
#define pud_pfn(pud) (((pud_val(pud) & PUD_MASK) & PHYS_MASK) >> PAGE_SHIFT)
diff -puN arch/sparc/include/asm/pgtable_64.h~mm-fix-device-dax-pud-write-faults-triggered-by-get_user_pages-v3 arch/sparc/include/asm/pgtable_64.h
--- a/arch/sparc/include/asm/pgtable_64.h~mm-fix-device-dax-pud-write-faults-triggered-by-get_user_pages-v3
+++ a/arch/sparc/include/asm/pgtable_64.h
@@ -723,7 +723,6 @@ static inline unsigned long pmd_write(pm
return pte_write(pte);
}
-#define __HAVE_ARCH_PUD_WRITE
#define pud_write(pud) pte_write(__pte(pud_val(pud)))
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
diff -puN arch/x86/include/asm/pgtable.h~mm-fix-device-dax-pud-write-faults-triggered-by-get_user_pages-v3 arch/x86/include/asm/pgtable.h
--- a/arch/x86/include/asm/pgtable.h~mm-fix-device-dax-pud-write-faults-triggered-by-get_user_pages-v3
+++ a/arch/x86/include/asm/pgtable.h
@@ -1088,7 +1088,7 @@ static inline void pmdp_set_wrprotect(st
clear_bit(_PAGE_BIT_RW, (unsigned long *)pmdp);
}
-#define __HAVE_ARCH_PUD_WRITE
+#define pud_write pud_write
static inline int pud_write(pud_t pud)
{
return pud_flags(pud) & _PAGE_RW;
diff -puN include/asm-generic/pgtable.h~mm-fix-device-dax-pud-write-faults-triggered-by-get_user_pages-v3 include/asm-generic/pgtable.h
--- a/include/asm-generic/pgtable.h~mm-fix-device-dax-pud-write-faults-triggered-by-get_user_pages-v3
+++ a/include/asm-generic/pgtable.h
@@ -812,16 +812,15 @@ static inline int pmd_write(pmd_t pmd)
return 0;
}
#endif /* __HAVE_ARCH_PMD_WRITE */
+#endif /* CONFIG_TRANSPARENT_HUGEPAGE */
-#ifndef __HAVE_ARCH_PUD_WRITE
+#ifndef pud_write
static inline int pud_write(pud_t pud)
{
BUG();
return 0;
}
-#endif /* __HAVE_ARCH_PUD_WRITE */
-
-#endif /* CONFIG_TRANSPARENT_HUGEPAGE */
+#endif /* pud_write */
#if !defined(CONFIG_TRANSPARENT_HUGEPAGE) || \
(defined(CONFIG_TRANSPARENT_HUGEPAGE) && \
_
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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