1 files changed, 8 insertions, 5 deletions

diff --git a/drivers/char/mem.c b/drivers/char/mem.c
index 524b707894ef..4c58333b4257 100644
--- a/drivers/char/mem.c
+++ b/drivers/char/mem.c
@@ -84,9 +84,12 @@ static inline int range_is_allowed(unsigned long pfn, unsigned long size)
 }
 #endif
 
-void __weak unxlate_dev_mem_ptr(unsigned long phys, void *addr)
+#ifndef unxlate_dev_mem_ptr
+#define unxlate_dev_mem_ptr unxlate_dev_mem_ptr
+void __weak unxlate_dev_mem_ptr(phys_addr_t phys, void *addr)
 {
 }
+#endif
 
 /*
  * This funcion reads the *physical* memory. The f_pos points directly to the
@@ -97,7 +100,7 @@ static ssize_t read_mem(struct file *file, char __user *buf,
 {
         phys_addr_t p = *ppos;
         ssize_t read, sz;
-        char *ptr;
+        void *ptr;
 
         if (p != *ppos)
                 return 0;
@@ -400,7 +403,7 @@ static ssize_t read_kmem(struct file *file, char __user *buf,
                          * uncached, then it must also be accessed uncached
                          * by the kernel or data corruption may occur
                          */
-                        kbuf = xlate_dev_kmem_ptr((char *)p);
+                        kbuf = xlate_dev_kmem_ptr((void *)p);
 
                         if (copy_to_user(buf, kbuf, sz))
                                 return -EFAULT;
@@ -461,7 +464,7 @@ static ssize_t do_write_kmem(unsigned long p, const char __user *buf,
 #endif
 
         while (count > 0) {
-                char *ptr;
+                void *ptr;
 
                 sz = size_inside_page(p, count);
 
@@ -470,7 +473,7 @@ static ssize_t do_write_kmem(unsigned long p, const char __user *buf,
                  * it must also be accessed uncached by the kernel or data
                  * corruption may occur.
                  */
-                ptr = xlate_dev_kmem_ptr((char *)p);
+                ptr = xlate_dev_kmem_ptr((void *)p);
 
                 copied = copy_from_user(ptr, buf, sz);
                 if (copied) {