[RFC,15/24] mm: export wp_page_copy()

Commit Message

Peter Xu Jan. 21, 2019, 7:57 a.m. UTC

Export this function for usages outside page fault handlers.

Signed-off-by: Peter Xu <[e-mail]>
---
 include/linux/mm.h | 2 ++
 mm/memory.c        | 2 +-
 2 files changed, 3 insertions(+), 1 deletion(-)

Patch

diff --git a/include/linux/mm.h b/include/linux/mm.h
index 89345b51d8bd..bf04e187fafe 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -378,6 +378,8 @@  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 7f276158683b..ef823c07f635 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;