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authorAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>2017-07-06 15:39:02 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2017-07-06 16:24:33 -0700
commit28c057160e8ae7538e5237744e6ec845d134975a (patch)
tree4bb8697c5651db8226685d063ca886bd8947e344 /arch
parent50791e6de0b5f2fa74b1a5211edd4d2a8354cc53 (diff)
downloadlinux-28c057160e8ae7538e5237744e6ec845d134975a.tar.bz2
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@linux.vnet.ibm.com Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Cc: Anshuman Khandual <khandual@linux.vnet.ibm.com> Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Mike Kravetz <kravetz@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch')
-rw-r--r--arch/powerpc/mm/hugetlbpage.c64
1 files changed, 0 insertions, 64 deletions
diff --git a/arch/powerpc/mm/hugetlbpage.c b/arch/powerpc/mm/hugetlbpage.c
index f5ec043d49df..f0b97d4f4387 100644
--- a/arch/powerpc/mm/hugetlbpage.c
+++ b/arch/powerpc/mm/hugetlbpage.c
@@ -619,11 +619,6 @@ void hugetlb_free_pgd_range(struct mmu_gather *tlb,
} 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)
{