[v3,13/28] mm: export wp_page_copy()

Commit Message

Peter Xu March 20, 2019, 2:06 a.m. UTC

Export this function for usages outside page fault handlers.

Reviewed-by: Jerome Glisse <[e-mail]>
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 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;