1 files changed, 8 insertions, 4 deletions

diff --git a/arch/x86_64/lib/usercopy.c b/arch/x86_64/lib/usercopy.c
index db8abba1ad81..9bc2c295818e 100644
--- a/arch/x86_64/lib/usercopy.c
+++ b/arch/x86_64/lib/usercopy.c
@@ -109,14 +109,11 @@ unsigned long clear_user(void __user *to, unsigned long n)
  * Return 0 on exception, a value greater than N if too long
  */
 
-long strnlen_user(const char __user *s, long n)
+long __strnlen_user(const char __user *s, long n)
 {
         long res = 0;
         char c;
 
-        if (!access_ok(VERIFY_READ, s, n))
-                return 0;
-
         while (1) {
                 if (res>n)
                         return n+1;
@@ -129,6 +126,13 @@ long strnlen_user(const char __user *s, long n)
         }
 }
 
+long strnlen_user(const char __user *s, long n)
+{
+        if (!access_ok(VERIFY_READ, s, n))
+                return 0;
+        return __strnlen_user(s, n);
+}
+
 long strlen_user(const char __user *s)
 {
         long res = 0;