1 files changed, 72 insertions, 99 deletions

diff --git a/arch/s390/include/asm/uaccess.h b/arch/s390/include/asm/uaccess.h
index 79330af9a5f8..4133b3f72fb0 100644
--- a/arch/s390/include/asm/uaccess.h
+++ b/arch/s390/include/asm/uaccess.h
@@ -92,33 +92,58 @@ static inline unsigned long extable_fixup(const struct exception_table_entry *x)
 #define ARCH_HAS_SORT_EXTABLE
 #define ARCH_HAS_SEARCH_EXTABLE
 
-struct uaccess_ops {
-        size_t (*copy_from_user)(size_t, const void __user *, void *);
-        size_t (*copy_to_user)(size_t, void __user *, const void *);
-        size_t (*copy_in_user)(size_t, void __user *, const void __user *);
-        size_t (*clear_user)(size_t, void __user *);
-        size_t (*strnlen_user)(size_t, const char __user *);
-        size_t (*strncpy_from_user)(size_t, const char __user *, char *);
-        int (*futex_atomic_op)(int op, u32 __user *, int oparg, int *old);
-        int (*futex_atomic_cmpxchg)(u32 *, u32 __user *, u32 old, u32 new);
-};
+int __handle_fault(unsigned long, unsigned long, int);
 
-extern struct uaccess_ops uaccess;
-extern struct uaccess_ops uaccess_mvcos;
-extern struct uaccess_ops uaccess_pt;
+/**
+ * __copy_from_user: - Copy a block of data from user space, with less checking.
+ * @to:   Destination address, in kernel space.
+ * @from: Source address, in user space.
+ * @n:    Number of bytes to copy.
+ *
+ * Context: User context only.  This function may sleep.
+ *
+ * Copy data from user space to kernel space.  Caller must check
+ * the specified block with access_ok() before calling this function.
+ *
+ * Returns number of bytes that could not be copied.
+ * On success, this will be zero.
+ *
+ * If some data could not be copied, this function will pad the copied
+ * data to the requested size using zero bytes.
+ */
+unsigned long __must_check __copy_from_user(void *to, const void __user *from,
+                                            unsigned long n);
+
+/**
+ * __copy_to_user: - Copy a block of data into user space, with less checking.
+ * @to:   Destination address, in user space.
+ * @from: Source address, in kernel space.
+ * @n:    Number of bytes to copy.
+ *
+ * Context: User context only.  This function may sleep.
+ *
+ * Copy data from kernel space to user space.  Caller must check
+ * the specified block with access_ok() before calling this function.
+ *
+ * Returns number of bytes that could not be copied.
+ * On success, this will be zero.
+ */
+unsigned long __must_check __copy_to_user(void __user *to, const void *from,
+                                          unsigned long n);
 
-extern int __handle_fault(unsigned long, unsigned long, int);
+#define __copy_to_user_inatomic __copy_to_user
+#define __copy_from_user_inatomic __copy_from_user
 
-static inline int __put_user_fn(size_t size, void __user *ptr, void *x)
+static inline int __put_user_fn(void *x, void __user *ptr, unsigned long size)
 {
-        size = uaccess.copy_to_user(size, ptr, x);
-        return size ? -EFAULT : size;
+        size = __copy_to_user(ptr, x, size);
+        return size ? -EFAULT : 0;
 }
 
-static inline int __get_user_fn(size_t size, const void __user *ptr, void *x)
+static inline int __get_user_fn(void *x, const void __user *ptr, unsigned long size)
 {
-        size = uaccess.copy_from_user(size, ptr, x);
-        return size ? -EFAULT : size;
+        size = __copy_from_user(x, ptr, size);
+        return size ? -EFAULT : 0;
 }
 
 /*
@@ -135,8 +160,8 @@ static inline int __get_user_fn(size_t size, const void __user *ptr, void *x)
         case 2:                                                 \
         case 4:                                                 \
         case 8:                                                 \
-                __pu_err = __put_user_fn(sizeof (*(ptr)),       \
-                                         ptr, &__x);            \
+                __pu_err = __put_user_fn(&__x, ptr,             \
+                                         sizeof(*(ptr)));       \
                 break;                                          \
         default:                                                \
                 __put_user_bad();                               \
@@ -152,7 +177,7 @@ static inline int __get_user_fn(size_t size, const void __user *ptr, void *x)
 })
 
 
-extern int __put_user_bad(void) __attribute__((noreturn));
+int __put_user_bad(void) __attribute__((noreturn));
 
 #define __get_user(x, ptr)                                      \
 ({                                                              \
@@ -161,29 +186,29 @@ extern int __put_user_bad(void) __attribute__((noreturn));
         switch (sizeof(*(ptr))) {                               \
         case 1: {                                               \
                 unsigned char __x;                              \
-                __gu_err = __get_user_fn(sizeof (*(ptr)),       \
-                                         ptr, &__x);            \
+                __gu_err = __get_user_fn(&__x, ptr,             \
+                                         sizeof(*(ptr)));       \
                 (x) = *(__force __typeof__(*(ptr)) *) &__x;     \
                 break;                                          \
         };                                                      \
         case 2: {                                               \
                 unsigned short __x;                             \
-                __gu_err = __get_user_fn(sizeof (*(ptr)),       \
-                                         ptr, &__x);            \
+                __gu_err = __get_user_fn(&__x, ptr,             \
+                                         sizeof(*(ptr)));       \
                 (x) = *(__force __typeof__(*(ptr)) *) &__x;     \
                 break;                                          \
         };                                                      \
         case 4: {                                               \
                 unsigned int __x;                               \
-                __gu_err = __get_user_fn(sizeof (*(ptr)),       \
-                                         ptr, &__x);            \
+                __gu_err = __get_user_fn(&__x, ptr,             \
+                                         sizeof(*(ptr)));       \
                 (x) = *(__force __typeof__(*(ptr)) *) &__x;     \
                 break;                                          \
         };                                                      \
         case 8: {                                               \
                 unsigned long long __x;                         \
-                __gu_err = __get_user_fn(sizeof (*(ptr)),       \
-                                         ptr, &__x);            \
+                __gu_err = __get_user_fn(&__x, ptr,             \
+                                         sizeof(*(ptr)));       \
                 (x) = *(__force __typeof__(*(ptr)) *) &__x;     \
                 break;                                          \
         };                                                      \
@@ -200,35 +225,12 @@ extern int __put_user_bad(void) __attribute__((noreturn));
         __get_user(x, ptr);                                     \
 })
 
-extern int __get_user_bad(void) __attribute__((noreturn));
+int __get_user_bad(void) __attribute__((noreturn));
 
 #define __put_user_unaligned __put_user
 #define __get_user_unaligned __get_user
 
 /**
- * __copy_to_user: - Copy a block of data into user space, with less checking.
- * @to:   Destination address, in user space.
- * @from: Source address, in kernel space.
- * @n:    Number of bytes to copy.
- *
- * Context: User context only.  This function may sleep.
- *
- * Copy data from kernel space to user space.  Caller must check
- * the specified block with access_ok() before calling this function.
- *
- * Returns number of bytes that could not be copied.
- * On success, this will be zero.
- */
-static inline unsigned long __must_check
-__copy_to_user(void __user *to, const void *from, unsigned long n)
-{
-        return uaccess.copy_to_user(n, to, from);
-}
-
-#define __copy_to_user_inatomic __copy_to_user
-#define __copy_from_user_inatomic __copy_from_user
-
-/**
  * copy_to_user: - Copy a block of data into user space.
  * @to:   Destination address, in user space.
  * @from: Source address, in kernel space.
@@ -248,30 +250,7 @@ copy_to_user(void __user *to, const void *from, unsigned long n)
         return __copy_to_user(to, from, n);
 }
 
-/**
- * __copy_from_user: - Copy a block of data from user space, with less checking.
- * @to:   Destination address, in kernel space.
- * @from: Source address, in user space.
- * @n:    Number of bytes to copy.
- *
- * Context: User context only.  This function may sleep.
- *
- * Copy data from user space to kernel space.  Caller must check
- * the specified block with access_ok() before calling this function.
- *
- * Returns number of bytes that could not be copied.
- * On success, this will be zero.
- *
- * If some data could not be copied, this function will pad the copied
- * data to the requested size using zero bytes.
- */
-static inline unsigned long __must_check
-__copy_from_user(void *to, const void __user *from, unsigned long n)
-{
-        return uaccess.copy_from_user(n, from, to);
-}
-
-extern void copy_from_user_overflow(void)
+void copy_from_user_overflow(void)
 #ifdef CONFIG_DEBUG_STRICT_USER_COPY_CHECKS
 __compiletime_warning("copy_from_user() buffer size is not provably correct")
 #endif
@@ -306,11 +285,8 @@ copy_from_user(void *to, const void __user *from, unsigned long n)
         return __copy_from_user(to, from, n);
 }
 
-static inline unsigned long __must_check
-__copy_in_user(void __user *to, const void __user *from, unsigned long n)
-{
-        return uaccess.copy_in_user(n, to, from);
-}
+unsigned long __must_check
+__copy_in_user(void __user *to, const void __user *from, unsigned long n);
 
 static inline unsigned long __must_check
 copy_in_user(void __user *to, const void __user *from, unsigned long n)
@@ -322,18 +298,22 @@ copy_in_user(void __user *to, const void __user *from, unsigned long n)
 /*
  * Copy a null terminated string from userspace.
  */
+
+long __strncpy_from_user(char *dst, const char __user *src, long count);
+
 static inline long __must_check
 strncpy_from_user(char *dst, const char __user *src, long count)
 {
         might_fault();
-        return uaccess.strncpy_from_user(count, src, dst);
+        return __strncpy_from_user(dst, src, count);
 }
 
-static inline unsigned long
-strnlen_user(const char __user * src, unsigned long n)
+unsigned long __must_check __strnlen_user(const char __user *src, unsigned long count);
+
+static inline unsigned long strnlen_user(const char __user *src, unsigned long n)
 {
         might_fault();
-        return uaccess.strnlen_user(n, src);
+        return __strnlen_user(src, n);
 }
 
 /**
@@ -355,21 +335,14 @@ strnlen_user(const char __user * src, unsigned long n)
 /*
  * Zero Userspace
  */
+unsigned long __must_check __clear_user(void __user *to, unsigned long size);
 
-static inline unsigned long __must_check
-__clear_user(void __user *to, unsigned long n)
-{
-        return uaccess.clear_user(n, to);
-}
-
-static inline unsigned long __must_check
-clear_user(void __user *to, unsigned long n)
+static inline unsigned long __must_check clear_user(void __user *to, unsigned long n)
 {
         might_fault();
-        return uaccess.clear_user(n, to);
+        return __clear_user(to, n);
 }
 
-extern int copy_to_user_real(void __user *dest, void *src, size_t count);
-extern int copy_from_user_real(void *dest, void __user *src, size_t count);
+int copy_to_user_real(void __user *dest, void *src, unsigned long count);
 
 #endif /* __S390_UACCESS_H */