The patch titled
Subject: powerpc/mm/hugetlb: remove follow_huge_addr for powerpc
has been added to the -mm tree. Its filename is
powerpc-mm-hugetlb-remove-follow_huge_addr-for-powerpc.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/powerpc-mm-hugetlb-remove-follow_huge_addr-for-powerpc.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/powerpc-mm-hugetlb-remove-follow_huge_addr-for-powerpc.patch
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------------------------------------------------------
From: "Aneesh Kumar K.V" <aneesh.kumar@xxxxxxxxxxxxxxxxxx>
Subject: powerpc/mm/hugetlb: remove follow_huge_addr for powerpc
With generic code now handling hugetlb entries at pgd level and also
supporting hugepage directory format, we can now remove the powerpc
sepcific follow_huge_addr implementation.
Link: http://lkml.kernel.org/r/1494926612-23928-9-git-send-email-aneesh.kumar@xxxxxxxxxxxxxxxxxx
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@xxxxxxxxxxxxxxxxxx>
Cc: Anshuman Khandual <khandual@xxxxxxxxxxxxxxxxxx>
Cc: Naoya Horiguchi <n-horiguchi@xxxxxxxxxxxxx>
Cc: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Cc: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>
Cc: Mike Kravetz <kravetz@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/powerpc/mm/hugetlbpage.c | 64 --------------------------------
1 file changed, 64 deletions(-)
diff -puN arch/powerpc/mm/hugetlbpage.c~powerpc-mm-hugetlb-remove-follow_huge_addr-for-powerpc arch/powerpc/mm/hugetlbpage.c
--- a/arch/powerpc/mm/hugetlbpage.c~powerpc-mm-hugetlb-remove-follow_huge_addr-for-powerpc
+++ a/arch/powerpc/mm/hugetlbpage.c
@@ -619,11 +619,6 @@ void hugetlb_free_pgd_range(struct mmu_g
} while (addr = next, addr != end);
}
-/*
- * 64 bit book3s use generic follow_page_mask
- */
-#ifdef CONFIG_PPC_BOOK3S_64
-
struct page *follow_huge_pd(struct vm_area_struct *vma,
unsigned long address, hugepd_t hpd,
int flags, int pdshift)
@@ -657,65 +652,6 @@ retry:
return page;
}
-#else /* !CONFIG_PPC_BOOK3S_64 */
-
-/*
- * We are holding mmap_sem, so a parallel huge page collapse cannot run.
- * To prevent hugepage split, disable irq.
- */
-struct page *
-follow_huge_addr(struct mm_struct *mm, unsigned long address, int write)
-{
- bool is_thp;
- pte_t *ptep, pte;
- unsigned shift;
- unsigned long mask, flags;
- struct page *page = ERR_PTR(-EINVAL);
-
- local_irq_save(flags);
- ptep = find_linux_pte_or_hugepte(mm->pgd, address, &is_thp, &shift);
- if (!ptep)
- goto no_page;
- pte = READ_ONCE(*ptep);
- /*
- * Verify it is a huge page else bail.
- * Transparent hugepages are handled by generic code. We can skip them
- * here.
- */
- if (!shift || is_thp)
- goto no_page;
-
- if (!pte_present(pte)) {
- page = NULL;
- goto no_page;
- }
- mask = (1UL << shift) - 1;
- page = pte_page(pte);
- if (page)
- page += (address & mask) / PAGE_SIZE;
-
-no_page:
- local_irq_restore(flags);
- return page;
-}
-
-struct page *
-follow_huge_pmd(struct mm_struct *mm, unsigned long address,
- pmd_t *pmd, int write)
-{
- BUG();
- return NULL;
-}
-
-struct page *
-follow_huge_pud(struct mm_struct *mm, unsigned long address,
- pud_t *pud, int write)
-{
- BUG();
- return NULL;
-}
-#endif
-
static unsigned long hugepte_addr_end(unsigned long addr, unsigned long end,
unsigned long sz)
{
_
Patches currently in -mm which might be from aneesh.kumar@xxxxxxxxxxxxxxxxxx are
mm-hugetlb-migration-use-set_huge_pte_at-instead-of-set_pte_at.patch
mm-follow_page_mask-split-follow_page_mask-to-smaller-functions.patch
mm-hugetlb-export-hugetlb_entry_migration-helper.patch
mm-hugetlb-move-default-definition-of-hugepd_t-earlier-in-the-header.patch
mm-follow_page_mask-add-support-for-hugepage-directory-entry.patch
powerpc-hugetlb-add-follow_huge_pd-implementation-for-ppc64.patch
powerpc-mm-hugetlb-remove-follow_huge_addr-for-powerpc.patch
powerpc-hugetlb-enable-hugetlb-migration-for-ppc64.patch
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