1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/char/mem.c b/drivers/char/mem.c
index e97c32ceb796..917b20402664 100644
--- a/drivers/char/mem.c
+++ b/drivers/char/mem.c
@@ -95,7 +95,7 @@ static inline int valid_phys_addr_range(unsigned long addr, size_t count)
         return 1;
 }
 
-static inline int valid_mmap_phys_addr_range(unsigned long addr, size_t size)
+static inline int valid_mmap_phys_addr_range(unsigned long pfn, size_t size)
 {
         return 1;
 }
@@ -242,7 +242,7 @@ static int mmap_mem(struct file * file, struct vm_area_struct * vma)
 {
         size_t size = vma->vm_end - vma->vm_start;
 
-        if (!valid_mmap_phys_addr_range(vma->vm_pgoff << PAGE_SHIFT, size))
+        if (!valid_mmap_phys_addr_range(vma->vm_pgoff, size))
                 return -EINVAL;
 
         vma->vm_page_prot = phys_mem_access_prot(file, vma->vm_pgoff,