VM: make zap_page_range() return void

... since all callers ignore its return value and it's been
useless since commit 97a894136f29802da19a15541de3c019e1ca147e
(mm: Remove i_mmap_lock lockbreak) anyway.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

2 files changed, 3 insertions, 4 deletions

diff --git a/include/linux/mm.h b/include/linux/mm.h
index 17b27cd269c4..6c65d24852e5 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -893,7 +893,7 @@ struct page *vm_normal_page(struct vm_area_struct *vma, unsigned long addr,
 
 int zap_vma_ptes(struct vm_area_struct *vma, unsigned long address,
                 unsigned long size);
-unsigned long zap_page_range(struct vm_area_struct *vma, unsigned long address,
+void zap_page_range(struct vm_area_struct *vma, unsigned long address,
                 unsigned long size, struct zap_details *);
 unsigned long unmap_vmas(struct mmu_gather *tlb,
                 struct vm_area_struct *start_vma, unsigned long start_addr,
diff --git a/mm/memory.c b/mm/memory.c
index f2317c85704e..cfb57b007a6c 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -1386,7 +1386,7 @@ unsigned long unmap_vmas(struct mmu_gather *tlb,
  * @size: number of bytes to zap
  * @details: details of nonlinear truncation or shared cache invalidation
  */
-unsigned long zap_page_range(struct vm_area_struct *vma, unsigned long address,
+void zap_page_range(struct vm_area_struct *vma, unsigned long address,
                 unsigned long size, struct zap_details *details)
 {
         struct mm_struct *mm = vma->vm_mm;
@@ -1397,9 +1397,8 @@ unsigned long zap_page_range(struct vm_area_struct *vma, unsigned long address,
         lru_add_drain();
         tlb_gather_mmu(&tlb, mm, 0);
         update_hiwater_rss(mm);
-        end = unmap_vmas(&tlb, vma, address, end, &nr_accounted, details);
+        unmap_vmas(&tlb, vma, address, end, &nr_accounted, details);
         tlb_finish_mmu(&tlb, address, end);
-        return end;
 }
 
 /**