On Tue, Feb 12, 2019 at 10:56:19AM +0800, Peter Xu wrote:
> Export this function for usages outside page fault handlers.
>
> Signed-off-by: Peter Xu <peterx@xxxxxxxxxx>
Reviewed-by: Jérôme Glisse <jglisse@xxxxxxxxxx>
> ---
> 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 f38fbe9c8bc9..2fd14a62324b 100644
> --- a/include/linux/mm.h
> +++ b/include/linux/mm.h
> @@ -405,6 +405,8 @@ 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 f8d83ae16eff..32d32b6e6339 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
>
