diff --git a/include/linux/mm.h b/include/linux/mm.h
index d4c3512..972e2ce8 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -682,7 +682,7 @@
 
 unsigned long 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 mm_struct *mm,
+unsigned long unmap_vmas(struct mmu_gather **tlb,
 		struct vm_area_struct *start_vma, unsigned long start_addr,
 		unsigned long end_addr, unsigned long *nr_accounted,
 		struct zap_details *);