The patch titled
Subject: powerpc/mm: use generic version of pmdp_clear_flush()
has been added to the -mm tree. Its filename is
powerpc-mm-use-generic-version-of-pmdp_clear_flush.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/powerpc-mm-use-generic-version-of-pmdp_clear_flush.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/powerpc-mm-use-generic-version-of-pmdp_clear_flush.patch
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------------------------------------------------------
From: "Aneesh Kumar K.V" <aneesh.kumar@xxxxxxxxxxxxxxxxxx>
Subject: powerpc/mm: use generic version of pmdp_clear_flush()
Also move the pmd_trans_huge check to generic code.
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@xxxxxxxxxxxxxxxxxx>
Acked-by: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx>
Cc: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>
Cc: Paul Mackerras <paulus@xxxxxxxxx>
Cc: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Cc: Andrea Arcangeli <aarcange@xxxxxxxxxx>
Cc: Martin Schwidefsky <schwidefsky@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/powerpc/include/asm/pgtable-ppc64.h | 4 ----
arch/powerpc/mm/pgtable_64.c | 11 -----------
arch/s390/include/asm/pgtable.h | 8 ++++++++
include/asm-generic/pgtable.h | 9 ++-------
mm/pgtable-generic.c | 17 +++++++++++++++++
5 files changed, 27 insertions(+), 22 deletions(-)
diff -puN arch/powerpc/include/asm/pgtable-ppc64.h~powerpc-mm-use-generic-version-of-pmdp_clear_flush arch/powerpc/include/asm/pgtable-ppc64.h
--- a/arch/powerpc/include/asm/pgtable-ppc64.h~powerpc-mm-use-generic-version-of-pmdp_clear_flush
+++ a/arch/powerpc/include/asm/pgtable-ppc64.h
@@ -557,10 +557,6 @@ extern int pmdp_clear_flush_young(struct
extern pmd_t pmdp_get_and_clear(struct mm_struct *mm,
unsigned long addr, pmd_t *pmdp);
-#define __HAVE_ARCH_PMDP_CLEAR_FLUSH
-extern pmd_t pmdp_clear_flush(struct vm_area_struct *vma, unsigned long address,
- pmd_t *pmdp);
-
#define __HAVE_ARCH_PMDP_SET_WRPROTECT
static inline void pmdp_set_wrprotect(struct mm_struct *mm, unsigned long addr,
pmd_t *pmdp)
diff -puN arch/powerpc/mm/pgtable_64.c~powerpc-mm-use-generic-version-of-pmdp_clear_flush arch/powerpc/mm/pgtable_64.c
--- a/arch/powerpc/mm/pgtable_64.c~powerpc-mm-use-generic-version-of-pmdp_clear_flush
+++ a/arch/powerpc/mm/pgtable_64.c
@@ -554,17 +554,6 @@ unsigned long pmd_hugepage_update(struct
return old;
}
-pmd_t pmdp_clear_flush(struct vm_area_struct *vma, unsigned long address,
- pmd_t *pmdp)
-{
- pmd_t pmd;
-
- VM_BUG_ON(address & ~HPAGE_PMD_MASK);
- VM_BUG_ON(!pmd_trans_huge(*pmdp));
- pmd = pmdp_get_and_clear(vma->vm_mm, address, pmdp);
- return pmd;
-}
-
pmd_t pmdp_collapse_flush(struct vm_area_struct *vma, unsigned long address,
pmd_t *pmdp)
{
diff -puN arch/s390/include/asm/pgtable.h~powerpc-mm-use-generic-version-of-pmdp_clear_flush arch/s390/include/asm/pgtable.h
--- a/arch/s390/include/asm/pgtable.h~powerpc-mm-use-generic-version-of-pmdp_clear_flush
+++ a/arch/s390/include/asm/pgtable.h
@@ -1548,6 +1548,14 @@ static inline void pmdp_set_wrprotect(st
}
}
+static inline pmd_t pmdp_collapse_flush(struct vm_area_struct *vma,
+ unsigned long address,
+ pmd_t *pmdp)
+{
+ return pmdp_get_and_clear(vma->vm_mm, address, pmdp);
+}
+#define pmdp_collapse_flush pmdp_collapse_flush
+
#define pfn_pmd(pfn, pgprot) mk_pmd_phys(__pa((pfn) << PAGE_SHIFT), (pgprot))
#define mk_pmd(page, pgprot) pfn_pmd(page_to_pfn(page), (pgprot))
diff -puN include/asm-generic/pgtable.h~powerpc-mm-use-generic-version-of-pmdp_clear_flush include/asm-generic/pgtable.h
--- a/include/asm-generic/pgtable.h~powerpc-mm-use-generic-version-of-pmdp_clear_flush
+++ a/include/asm-generic/pgtable.h
@@ -191,13 +191,8 @@ extern void pmdp_splitting_flush(struct
#ifndef pmdp_collapse_flush
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
-static inline pmd_t pmdp_collapse_flush(struct vm_area_struct *vma,
- unsigned long address,
- pmd_t *pmdp)
-{
- return pmdp_clear_flush(vma, address, pmdp);
-}
-#define pmdp_collapse_flush pmdp_collapse_flush
+extern pmd_t pmdp_collapse_flush(struct vm_area_struct *vma,
+ unsigned long address, pmd_t *pmdp);
#else
static inline pmd_t pmdp_collapse_flush(struct vm_area_struct *vma,
unsigned long address,
diff -puN mm/pgtable-generic.c~powerpc-mm-use-generic-version-of-pmdp_clear_flush mm/pgtable-generic.c
--- a/mm/pgtable-generic.c~powerpc-mm-use-generic-version-of-pmdp_clear_flush
+++ a/mm/pgtable-generic.c
@@ -126,6 +126,7 @@ pmd_t pmdp_clear_flush(struct vm_area_st
{
pmd_t pmd;
VM_BUG_ON(address & ~HPAGE_PMD_MASK);
+ VM_BUG_ON(!pmd_trans_huge(*pmdp));
pmd = pmdp_get_and_clear(vma->vm_mm, address, pmdp);
flush_tlb_range(vma, address, address + HPAGE_PMD_SIZE);
return pmd;
@@ -198,3 +199,19 @@ void pmdp_invalidate(struct vm_area_stru
}
#endif /* CONFIG_TRANSPARENT_HUGEPAGE */
#endif
+
+#ifndef pmdp_collapse_flush
+#ifdef CONFIG_TRANSPARENT_HUGEPAGE
+pmd_t pmdp_collapse_flush(struct vm_area_struct *vma, unsigned long address,
+ pmd_t *pmdp)
+{
+ pmd_t pmd;
+
+ VM_BUG_ON(address & ~HPAGE_PMD_MASK);
+ VM_BUG_ON(pmd_trans_huge(*pmdp));
+ pmd = pmdp_get_and_clear(vma->vm_mm, address, pmdp);
+ flush_tlb_range(vma, address, address + HPAGE_PMD_SIZE);
+ return pmd;
+}
+#endif /* CONFIG_TRANSPARENT_HUGEPAGE */
+#endif
_
Patches currently in -mm which might be from aneesh.kumar@xxxxxxxxxxxxxxxxxx are
origin.patch
tracing-mm-dont-trace-kmem_cache_free-on-offline-cpus.patch
mm-hugetlb-reduce-arch-dependent-code-about-huge_pmd_unshare.patch
mm-thp-split-out-pmd-collpase-flush-into-a-separate-functions.patch
powerpc-mm-use-generic-version-of-pmdp_clear_flush.patch
mm-clarify-that-the-function-operates-on-hugepage-pte.patch
page-flags-trivial-cleanup-for-pagetrans-helpers.patch
page-flags-introduce-page-flags-policies-wrt-compound-pages.patch
page-flags-define-pg_locked-behavior-on-compound-pages.patch
page-flags-define-behavior-of-fs-io-related-flags-on-compound-pages.patch
page-flags-define-behavior-of-lru-related-flags-on-compound-pages.patch
page-flags-define-behavior-slb-related-flags-on-compound-pages.patch
page-flags-define-behavior-of-xen-related-flags-on-compound-pages.patch
page-flags-define-pg_reserved-behavior-on-compound-pages.patch
page-flags-define-pg_swapbacked-behavior-on-compound-pages.patch
page-flags-define-pg_swapcache-behavior-on-compound-pages.patch
page-flags-define-pg_mlocked-behavior-on-compound-pages.patch
page-flags-define-pg_uncached-behavior-on-compound-pages.patch
page-flags-define-pg_uptodate-behavior-on-compound-pages.patch
page-flags-look-on-head-page-if-the-flag-is-encoded-in-page-mapping.patch
mm-sanitize-page-mapping-for-tail-pages.patch
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