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2024-05-10 37f49e37ab4cb5d0bc4c60eb5c6d4dd57db767bb

 kernel/arch/nds32/include/asm/uaccess.h
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@@ -1,4 +1,4 @@
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-// SPDX-License-Identifier: GPL-2.0
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+/* SPDX-License-Identifier: GPL-2.0 */
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 // Copyright (C) 2005-2017 Andes Technology Corporation
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 #ifndef _ASMANDES_UACCESS_H
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@@ -11,10 +11,6 @@
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 #include <asm/errno.h>
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 #include <asm/memory.h>
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 #include <asm/types.h>
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-#include <linux/mm.h>
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-
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-#define VERIFY_READ	0
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-#define VERIFY_WRITE	1
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 #define __asmeq(x, y)  ".ifnc " x "," y " ; .err ; .endif\n\t"
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@@ -40,7 +36,6 @@
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 #define KERNEL_DS 	((mm_segment_t) { ~0UL })
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 #define USER_DS		((mm_segment_t) {TASK_SIZE - 1})
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-#define get_ds()	(KERNEL_DS)
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 #define get_fs()	(current_thread_info()->addr_limit)
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 #define user_addr_max	get_fs
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@@ -49,11 +44,11 @@
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 	current_thread_info()->addr_limit = fs;
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 }
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-#define segment_eq(a, b)	((a) == (b))
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+#define uaccess_kernel()	(get_fs() == KERNEL_DS)
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 #define __range_ok(addr, size) (size <= get_fs() && addr <= (get_fs() -size))
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-#define access_ok(type, addr, size)	\
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+#define access_ok(addr, size)	\
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 	__range_ok((unsigned long)addr, (unsigned long)size)
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 /*
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  * Single-value transfer routines.  They automatically use the right
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@@ -75,9 +70,7 @@
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  * versions are void (ie, don't return a value as such).
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  */
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-#define get_user	__get_user					\
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-
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-#define __get_user(x, ptr)						\
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+#define get_user(x, ptr)						\
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 ({									\
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 	long __gu_err = 0;						\
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 	__get_user_check((x), (ptr), __gu_err);				\
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@@ -90,11 +83,19 @@
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 	(void)0;							\
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 })
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+#define __get_user(x, ptr)						\
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+({									\
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+	long __gu_err = 0;						\
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+	const __typeof__(*(ptr)) __user *__p = (ptr);			\
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+	__get_user_err((x), __p, (__gu_err));				\
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+	__gu_err;							\
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+})
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+
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 #define __get_user_check(x, ptr, err)					\
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 ({									\
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 	const __typeof__(*(ptr)) __user *__p = (ptr);			\
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 	might_fault();							\
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-	if (access_ok(VERIFY_READ, __p, sizeof(*__p))) {		\
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+	if (access_ok(__p, sizeof(*__p))) {		\
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 		__get_user_err((x), __p, (err));			\
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 	} else {							\
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 		(x) = 0; (err) = -EFAULT;				\
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@@ -170,12 +171,18 @@
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 		: "r"(addr), "i"(-EFAULT)				\
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 		: "cc")
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-#define put_user	__put_user					\
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+#define put_user(x, ptr)						\
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+({									\
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+	long __pu_err = 0;						\
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+	__put_user_check((x), (ptr), __pu_err);				\
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+	__pu_err;							\
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+})
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 #define __put_user(x, ptr)						\
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 ({									\
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 	long __pu_err = 0;						\
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-	__put_user_err((x), (ptr), __pu_err);				\
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+	__typeof__(*(ptr)) __user *__p = (ptr);				\
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+	__put_user_err((x), __p, __pu_err);				\
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 	__pu_err;							\
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 })
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@@ -189,7 +196,7 @@
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 ({									\
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 	__typeof__(*(ptr)) __user *__p = (ptr);				\
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 	might_fault();							\
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-	if (access_ok(VERIFY_WRITE, __p, sizeof(*__p))) {		\
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+	if (access_ok(__p, sizeof(*__p))) {		\
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 		__put_user_err((x), __p, (err));			\
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 	} else	{							\
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 		(err) = -EFAULT;					\
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@@ -279,7 +286,7 @@
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 #define INLINE_COPY_TO_USER
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 static inline unsigned long clear_user(void __user * to, unsigned long n)
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 {
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-	if (access_ok(VERIFY_WRITE, to, n))
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+	if (access_ok(to, n))
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 		n = __arch_clear_user(to, n);
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 	return n;
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 }