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    Subject[PATCHv2 18/28] thp: prepare change_huge_pmd() for file thp
    Date
    change_huge_pmd() has assert which is not relvant for file page.
    For shared mapping it's perfectly fine to have page table entry
    writable, without explicit mkwrite.

    Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
    ---
    mm/huge_memory.c | 1 -
    1 file changed, 1 deletion(-)

    diff --git a/mm/huge_memory.c b/mm/huge_memory.c
    index 00f10d323039..8e2d84698c15 100644
    --- a/mm/huge_memory.c
    +++ b/mm/huge_memory.c
    @@ -1756,7 +1756,6 @@ int change_huge_pmd(struct vm_area_struct *vma, pmd_t *pmd,
    entry = pmd_mkwrite(entry);
    ret = HPAGE_PMD_NR;
    set_pmd_at(mm, addr, pmd, entry);
    - BUG_ON(!preserve_write && pmd_write(entry));
    }
    spin_unlock(ptl);
    }
    --
    2.7.0
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