mips: switch to RAW_COPY_USER

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

2 files changed, 27 insertions, 248 deletions

diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index a008a9f03072..aff5633bfe4d 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -69,6 +69,7 @@ config MIPS
 	select HAVE_EXIT_THREAD
 	select HAVE_REGS_AND_STACK_ACCESS_API
 	select HAVE_ARCH_HARDENED_USERCOPY
+	select ARCH_HAS_RAW_COPY_USER
 
 menu "Machine selection"
 
diff --git a/arch/mips/include/asm/uaccess.h b/arch/mips/include/asm/uaccess.h
index 988cd3b64a59..99e629a590a5 100644
--- a/arch/mips/include/asm/uaccess.h
+++ b/arch/mips/include/asm/uaccess.h
@@ -882,257 +882,35 @@ extern size_t __copy_in_user_eva(void *__to, const void *__from, size_t __n);
 
 #endif /* CONFIG_EVA */
 
-/*
- * __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 if pagefaults are
- *          enabled.
- *
- * 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.
- */
-#define __copy_to_user(to, from, n)					\
-({									\
-	void __user *__cu_to;						\
-	const void *__cu_from;						\
-	long __cu_len;							\
-									\
-	__cu_to = (to);							\
-	__cu_from = (from);						\
-	__cu_len = (n);							\
-									\
-	check_object_size(__cu_from, __cu_len, true);			\
-	might_fault();							\
-									\
-	if (eva_kernel_access())					\
-		__cu_len = __invoke_copy_to_kernel(__cu_to, __cu_from,	\
-						   __cu_len);		\
-	else								\
-		__cu_len = __invoke_copy_to_user(__cu_to, __cu_from,	\
-						 __cu_len);		\
-	__cu_len;							\
-})
-
-#define __copy_to_user_inatomic(to, from, n)				\
-({									\
-	void __user *__cu_to;						\
-	const void *__cu_from;						\
-	long __cu_len;							\
-									\
-	__cu_to = (to);							\
-	__cu_from = (from);						\
-	__cu_len = (n);							\
-									\
-	check_object_size(__cu_from, __cu_len, true);			\
-									\
-	if (eva_kernel_access())					\
-		__cu_len = __invoke_copy_to_kernel(__cu_to, __cu_from,	\
-						   __cu_len);		\
-	else								\
-		__cu_len = __invoke_copy_to_user(__cu_to, __cu_from,	\
-						 __cu_len);		\
-	__cu_len;							\
-})
-
-#define __copy_from_user_inatomic(to, from, n)				\
-({									\
-	void *__cu_to;							\
-	const void __user *__cu_from;					\
-	long __cu_len;							\
-									\
-	__cu_to = (to);							\
-	__cu_from = (from);						\
-	__cu_len = (n);							\
-									\
-	check_object_size(__cu_to, __cu_len, false);			\
-									\
-	if (eva_kernel_access())					\
-		__cu_len = __invoke_copy_from_kernel(__cu_to, __cu_from,\
-							      __cu_len);\
-	else								\
-		__cu_len = __invoke_copy_from_user(__cu_to, __cu_from,	\
-							    __cu_len);	\
-	__cu_len;							\
-})
-
-/*
- * copy_to_user: - Copy a block of data into user space.
- * @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 if pagefaults are
- *          enabled.
- *
- * Copy data from kernel space to user space.
- *
- * Returns number of bytes that could not be copied.
- * On success, this will be zero.
- */
-#define copy_to_user(to, from, n)					\
-({									\
-	void __user *__cu_to;						\
-	const void *__cu_from;						\
-	long __cu_len;							\
-									\
-	__cu_to = (to);							\
-	__cu_from = (from);						\
-	__cu_len = (n);							\
-									\
-	check_object_size(__cu_from, __cu_len, true);			\
-									\
-	if (eva_kernel_access()) {					\
-		__cu_len = __invoke_copy_to_kernel(__cu_to,		\
-						   __cu_from,		\
-						   __cu_len);		\
-	} else {							\
-		if (access_ok(VERIFY_WRITE, __cu_to, __cu_len)) {       \
-			might_fault();                                  \
-			__cu_len = __invoke_copy_to_user(__cu_to,	\
-							 __cu_from,	\
-							 __cu_len);     \
-		}							\
-	}								\
-	__cu_len;							\
-})
-
-/*
- * __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 if pagefaults are
- *          enabled.
- *
- * 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.
- */
-#define __copy_from_user(to, from, n)					\
-({									\
-	void *__cu_to;							\
-	const void __user *__cu_from;					\
-	long __cu_len;							\
-									\
-	__cu_to = (to);							\
-	__cu_from = (from);						\
-	__cu_len = (n);							\
-									\
-	check_object_size(__cu_to, __cu_len, false);			\
-									\
-	if (eva_kernel_access()) {					\
-		__cu_len = __invoke_copy_from_kernel(__cu_to,		\
-						     __cu_from,		\
-						     __cu_len);		\
-	} else {							\
-		might_fault();						\
-		__cu_len = __invoke_copy_from_user(__cu_to, __cu_from,	\
-						   __cu_len);		\
-	}								\
-	__cu_len;							\
-})
+static inline unsigned long
+raw_copy_to_user(void __user *to, const void *from, unsigned long n)
+{
+	if (eva_kernel_access())
+		return __invoke_copy_to_kernel(to, from, n);
+	else
+		return __invoke_copy_to_user(to, from, n);
+}
 
-/*
- * copy_from_user: - Copy a block of data from user space.
- * @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 if pagefaults are
- *          enabled.
- *
- * Copy data from user space to kernel space.
- *
- * 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.
- */
-#define copy_from_user(to, from, n)					\
-({									\
-	void *__cu_to;							\
-	const void __user *__cu_from;					\
-	long __cu_len, __cu_res;					\
-									\
-	__cu_to = (to);							\
-	__cu_from = (from);						\
-	__cu_res = __cu_len = (n);					\
-									\
-	check_object_size(__cu_to, __cu_len, false);			\
-									\
-	if (eva_kernel_access()) {					\
-		__cu_res = __invoke_copy_from_kernel(__cu_to,		\
-						     __cu_from,		\
-						     __cu_len);		\
-	} else {							\
-		if (access_ok(VERIFY_READ, __cu_from, __cu_len)) {	\
-			might_fault();                                  \
-			__cu_res = __invoke_copy_from_user(__cu_to,	\
-							   __cu_from,	\
-							   __cu_len);   \
-		}							\
-	}								\
-	if (unlikely(__cu_res))						\
-		memset(__cu_to + __cu_len - __cu_res, 0, __cu_res);	\
-	__cu_res;							\
-})
+static inline unsigned long
+raw_copy_from_user(void *to, const void __user *from, unsigned long n)
+{
+	if (eva_kernel_access())
+		return __invoke_copy_from_kernel(to, from, n);
+	else
+		return __invoke_copy_from_user(to, from, n);
+}
 
-#define __copy_in_user(to, from, n)					\
-({									\
-	void __user *__cu_to;						\
-	const void __user *__cu_from;					\
-	long __cu_len;							\
-									\
-	__cu_to = (to);							\
-	__cu_from = (from);						\
-	__cu_len = (n);							\
-	if (eva_kernel_access()) {					\
-		__cu_len = ___invoke_copy_in_kernel(__cu_to, __cu_from,	\
-						    __cu_len);		\
-	} else {							\
-		might_fault();						\
-		__cu_len = ___invoke_copy_in_user(__cu_to, __cu_from,	\
-						  __cu_len);		\
-	}								\
-	__cu_len;							\
-})
+#define INLINE_COPY_FROM_USER
+#define INLINE_COPY_TO_USER
 
-#define copy_in_user(to, from, n)					\
-({									\
-	void __user *__cu_to;						\
-	const void __user *__cu_from;					\
-	long __cu_len;							\
-									\
-	__cu_to = (to);							\
-	__cu_from = (from);						\
-	__cu_len = (n);							\
-	if (eva_kernel_access()) {					\
-		__cu_len = ___invoke_copy_in_kernel(__cu_to,__cu_from,	\
-						    __cu_len);		\
-	} else {							\
-		if (likely(access_ok(VERIFY_READ, __cu_from, __cu_len) &&\
-			   access_ok(VERIFY_WRITE, __cu_to, __cu_len))) {\
-			might_fault();					\
-			__cu_len = ___invoke_copy_in_user(__cu_to,	\
-							  __cu_from,	\
-							  __cu_len);	\
-		}							\
-	}								\
-	__cu_len;							\
-})
+static inline unsigned long
+raw_copy_in_user(void __user*to, const void __user *from, unsigned long n)
+{
+	if (eva_kernel_access())
+		return ___invoke_copy_in_kernel(to, from, n);
+	else
+		return ___invoke_copy_in_user(to, from,	n);
+}
 
 extern __kernel_size_t __bzero_kernel(void __user *addr, __kernel_size_t size);
 extern __kernel_size_t __bzero(void __user *addr, __kernel_size_t size);