microblaze: uaccess: fix copy_from_user macro

copy_from_user macro also use copy_tofrom_user function

Signed-off-by: Michal Simek <monstr@monstr.eu>

1 files changed, 14 insertions, 9 deletions

diff --git a/arch/microblaze/include/asm/uaccess.h b/arch/microblaze/include/asm/uaccess.h
index 125e4cf4105c..b56d8ae9b17e 100644
--- a/arch/microblaze/include/asm/uaccess.h
+++ b/arch/microblaze/include/asm/uaccess.h
@@ -375,12 +375,24 @@ extern long __user_bad(void);
 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(to, from, n)   \
+        __copy_tofrom_user((__force void __user *)(to), \
+                                (void __user *)(from), (n))
 #define __copy_from_user_inatomic(to, from, n) \
                 copy_from_user((to), (from), (n))
 
+static inline long copy_from_user(void *to,
+                const void __user *from, unsigned long n)
+{
+        might_sleep();
+        if (access_ok(VERIFY_READ, from, n))
+                return __copy_from_user(to, from, n);
+        else
+                return n;
+}
+
 #define __copy_to_user(to, from, n)     \
-        __copy_tofrom_user((void __user *)(to), \
+                __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))
 
@@ -394,12 +406,6 @@ static inline long copy_to_user(void __user *to,
                 return n;
 }
 
-#define copy_from_user(to, from, n)                                     \
-        (access_ok(VERIFY_READ, (from), (n)) ?                          \
-                __copy_tofrom_user((__force void __user *)(to),         \
-                        (void __user *)(from), (n))                     \
-                : -EFAULT)
-
 extern int __strncpy_user(char *to, const char __user *from, int len);
 extern int __strnlen_user(const char __user *sstr, int len);
 
@@ -411,7 +417,6 @@ extern int __strnlen_user(const char __user *sstr, int len);
 
 #endif /* CONFIG_MMU */
 
-
 #endif  /* __ASSEMBLY__ */
 #endif /* __KERNEL__ */