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    Subject[PATCH v3 13/28] mm: export wp_page_copy()
    Date
    Export this function for usages outside page fault handlers.

    Reviewed-by: Jerome Glisse <jglisse@redhat.com>
    Signed-off-by: Peter Xu <peterx@redhat.com>
    ---
    include/linux/mm.h | 2 ++
    mm/memory.c | 2 +-
    2 files changed, 3 insertions(+), 1 deletion(-)

    diff --git a/include/linux/mm.h b/include/linux/mm.h
    index b39efe5ca7f6..00b040e0358d 100644
    --- a/include/linux/mm.h
    +++ b/include/linux/mm.h
    @@ -441,6 +441,8 @@ struct vm_fault {
    */
    };

    +vm_fault_t wp_page_copy(struct vm_fault *vmf);
    +
    /* page entry size for vm->huge_fault() */
    enum page_entry_size {
    PE_SIZE_PTE = 0,
    diff --git a/mm/memory.c b/mm/memory.c
    index 50c2990648ab..e7a4b9650225 100644
    --- a/mm/memory.c
    +++ b/mm/memory.c
    @@ -2239,7 +2239,7 @@ static inline void wp_page_reuse(struct vm_fault *vmf)
    * held to the old page, as well as updating the rmap.
    * - In any case, unlock the PTL and drop the reference we took to the old page.
    */
    -static vm_fault_t wp_page_copy(struct vm_fault *vmf)
    +vm_fault_t wp_page_copy(struct vm_fault *vmf)
    {
    struct vm_area_struct *vma = vmf->vma;
    struct mm_struct *mm = vma->vm_mm;
    --
    2.17.1
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