From: Al Viro <viro@zeniv.linux.org.uk>
Date: Tue, 21 Mar 2017 12:50:56 +0000 (-0400)
Subject: m68k: switch to RAW_COPY_USER
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=29be02eb6fef5f26332eb3e13ead868cff0910af;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

m68k: switch to RAW_COPY_USER

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

diff --git a/arch/m68k/Kconfig b/arch/m68k/Kconfig
index d140206d5d29..7d345758ea16 100644
--- a/arch/m68k/Kconfig
+++ b/arch/m68k/Kconfig
@@ -22,6 +22,7 @@ config M68K
 	select MODULES_USE_ELF_RELA
 	select OLD_SIGSUSPEND3
 	select OLD_SIGACTION
+	select ARCH_HAS_RAW_COPY_USER
 
 config RWSEM_GENERIC_SPINLOCK
 	bool
diff --git a/arch/m68k/include/asm/uaccess_mm.h b/arch/m68k/include/asm/uaccess_mm.h
index 931bbba449e2..ef856ffeffdf 100644
--- a/arch/m68k/include/asm/uaccess_mm.h
+++ b/arch/m68k/include/asm/uaccess_mm.h
@@ -356,28 +356,23 @@ __constant_copy_to_user(void __user *to, const void *from, unsigned long n)
 	return res;
 }
 
-#define __copy_from_user(to, from, n)		\
-(__builtin_constant_p(n) ?			\
- __constant_copy_from_user(to, from, n) :	\
- __generic_copy_from_user(to, from, n))
-
-#define __copy_to_user(to, from, n)		\
-(__builtin_constant_p(n) ?			\
- __constant_copy_to_user(to, from, n) :		\
- __generic_copy_to_user(to, from, n))
-
-#define __copy_to_user_inatomic		__copy_to_user
-#define __copy_from_user_inatomic	__copy_from_user
+static inline unsigned long
+raw_copy_from_user(void *to, const void __user *from, unsigned long n)
+{
+	if (__builtin_constant_p(n))
+		return __constant_copy_from_user(to, from, n);
+	return __generic_copy_from_user(to, from, n);
+}
 
 static inline unsigned long
-copy_from_user(void *to, const void __user *from, unsigned long n)
+raw_copy_to_user(void __user *to, const void *from, unsigned long n)
 {
-	unsigned long res = __copy_from_user_inatomic(to, from, n);
-	if (unlikely(res))
-		memset(to + (n - res), 0, res);
-	return res;
+	if (__builtin_constant_p(n))
+		return __constant_copy_to_user(to, from, n);
+	return __generic_copy_to_user(to, from, n);
 }
-#define copy_to_user(to, from, n)	__copy_to_user(to, from, n)
+#define INLINE_COPY_FROM_USER
+#define INLINE_COPY_TO_USER
 
 #define user_addr_max() \
 	(uaccess_kernel() ? ~0UL : TASK_SIZE)
diff --git a/arch/m68k/include/asm/uaccess_no.h b/arch/m68k/include/asm/uaccess_no.h
index 3f7f54d5134c..e482c3899ff1 100644
--- a/arch/m68k/include/asm/uaccess_no.h
+++ b/arch/m68k/include/asm/uaccess_no.h
@@ -101,13 +101,21 @@ extern int __get_user_bad(void);
 		 : "=d" (x)					\
 		 : "m" (*__ptr(ptr)))
 
-#define copy_from_user(to, from, n)		(memcpy(to, from, n), 0)
-#define copy_to_user(to, from, n)		(memcpy(to, from, n), 0)
+static inline unsigned long
+raw_copy_from_user(void *to, const void __user *from, unsigned long n)
+{
+	memcpy(to, (__force const void *)from, n);
+	return 0;
+}
 
-#define __copy_from_user(to, from, n) copy_from_user(to, from, n)
-#define __copy_to_user(to, from, n) copy_to_user(to, from, n)
-#define __copy_to_user_inatomic __copy_to_user
-#define __copy_from_user_inatomic __copy_from_user
+static inline unsigned long
+raw_copy_to_user(void __user *to, const void *from, unsigned long n)
+{
+	memcpy((__force void *)to, from, n);
+	return 0;
+}
+#define INLINE_COPY_FROM_USER
+#define INLINE_COPY_TO_USER
 
 /*
  * Copy a null terminated string from userspace.