1 files changed, 16 insertions, 9 deletions

diff --git a/arch/microblaze/include/asm/uaccess.h b/arch/microblaze/include/asm/uaccess.h
index 6bb9b8fb6655..125e4cf4105c 100644
--- a/arch/microblaze/include/asm/uaccess.h
+++ b/arch/microblaze/include/asm/uaccess.h
@@ -372,19 +372,28 @@ extern long __user_bad(void);
                 ? __put_user((x), (ptr)) : -EFAULT;                     \
 })
 
+extern unsigned long __copy_tofrom_user(void __user *to,
+                const void __user *from, unsigned long size);
+
 #define __copy_from_user(to, from, n)   copy_from_user((to), (from), (n))
 #define __copy_from_user_inatomic(to, from, n) \
                 copy_from_user((to), (from), (n))
 
-#define copy_to_user(to, from, n)                                       \
-        (access_ok(VERIFY_WRITE, (to), (n)) ?                           \
-                __copy_tofrom_user((void __user *)(to),                 \
-                        (__force const void __user *)(from), (n))       \
-                : -EFAULT)
-
-#define __copy_to_user(to, from, n)     copy_to_user((to), (from), (n))
+#define __copy_to_user(to, from, n)     \
+        __copy_tofrom_user((void __user *)(to), \
+                        (__force const void __user *)(from), (n))
 #define __copy_to_user_inatomic(to, from, n)    copy_to_user((to), (from), (n))
 
+static inline long copy_to_user(void __user *to,
+                const void *from, unsigned long n)
+{
+        might_sleep();
+        if (access_ok(VERIFY_WRITE, to, n))
+                return __copy_to_user(to, from, n);
+        else
+                return n;
+}
+
 #define copy_from_user(to, from, n)                                     \
         (access_ok(VERIFY_READ, (from), (n)) ?                          \
                 __copy_tofrom_user((__force void __user *)(to),         \
@@ -402,8 +411,6 @@ extern int __strnlen_user(const char __user *sstr, int len);
 
 #endif /* CONFIG_MMU */
 
-extern unsigned long __copy_tofrom_user(void __user *to,
-                const void __user *from, unsigned long size);
 
 #endif  /* __ASSEMBLY__ */
 #endif /* __KERNEL__ */