From: Paul Mundt <lethal@linux-sh.org>
Date: Wed, 26 Dec 2007 09:37:16 +0000 (+0900)
Subject: sh: Fix get_user()/put_user() build error.
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=0465b9fb5f6b57f00a6f5bf2169e30e8f3c7d66c;p=GitHub%2FLineageOS%2Fandroid_kernel_samsung_universal7580.git

sh: Fix get_user()/put_user() build error.

Fixes the build error caused by -Werror on gcc 3.x compilers:

arch/sh/kernel/signal_32.c: In function `sys_sigaction':
arch/sh/kernel/signal_32.c:66: warning: initialization discards qualifiers from pointer target type
arch/sh/kernel/signal_32.c:67: warning: initialization discards qualifiers from pointer target type
arch/sh/kernel/signal_32.c:69: warning: initialization discards qualifiers from pointer target type
arch/sh/kernel/signal_32.c:70: warning: initialization discards qualifiers from pointer target type

The mismatch in question was introduced by commit-id
9c5a4eec79b3eb8876d2e7fddfa1e040a7650e55.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---

diff --git a/include/asm-sh/uaccess_32.h b/include/asm-sh/uaccess_32.h
index 59a9f20c2dc..b6082f3c1dc 100644
--- a/include/asm-sh/uaccess_32.h
+++ b/include/asm-sh/uaccess_32.h
@@ -95,11 +95,9 @@ static inline int __access_ok(unsigned long addr, unsigned long size)
 }
 #endif /* CONFIG_MMU */
 
-static inline int access_ok(int type, const void __user *p, unsigned long size)
-{
-	unsigned long addr = (unsigned long)p;
-	return __access_ok(addr, size);
-}
+#define access_ok(type, addr, size)	\
+	(__chk_user_ptr(addr),		\
+	 __access_ok((unsigned long __force)(addr), (size)))
 
 /*
  * Uh, these should become the main single-value transfer routines ...
@@ -113,18 +111,16 @@ static inline int access_ok(int type, const void __user *p, unsigned long size)
  * (a) re-use the arguments for side effects (sizeof is ok)
  * (b) require any knowledge of processes at this stage
  */
-#define put_user(x,ptr)	__put_user_check((x),(ptr),sizeof(*(ptr)))
-#define get_user(x,ptr) __get_user_check((x),(ptr),sizeof(*(ptr)))
+#define put_user(x,ptr)		__put_user_check((x), (ptr), sizeof(*(ptr)))
+#define get_user(x,ptr)		__get_user_check((x), (ptr), sizeof(*(ptr)))
 
 /*
  * The "__xxx" versions do not do address space checking, useful when
  * doing multiple accesses to the same area (the user has to do the
  * checks by hand with "access_ok()")
  */
-#define __put_user(x,ptr) \
-  __put_user_nocheck((__typeof__(*(ptr)))(x),(ptr),sizeof(*(ptr)))
-#define __get_user(x,ptr) \
-  __get_user_nocheck((x),(ptr),sizeof(*(ptr)))
+#define __put_user(x,ptr)	__put_user_nocheck((x), (ptr), sizeof(*(ptr)))
+#define __get_user(x,ptr)	__get_user_nocheck((x), (ptr), sizeof(*(ptr)))
 
 struct __large_struct { unsigned long buf[100]; };
 #define __m(x) (*(struct __large_struct __user *)(x))
@@ -132,7 +128,6 @@ struct __large_struct { unsigned long buf[100]; };
 #define __get_user_size(x,ptr,size,retval)			\
 do {								\
 	retval = 0;						\
-	__chk_user_ptr(ptr);					\
 	switch (size) {						\
 	case 1:							\
 		__get_user_asm(x, ptr, retval, "b");		\
@@ -151,24 +146,22 @@ do {								\
 
 #define __get_user_nocheck(x,ptr,size)				\
 ({								\
-	long __gu_err, __gu_val;				\
-	__typeof__(*(ptr)) *__pu_addr = (ptr);  \
-	__get_user_size(__gu_val, (__pu_addr), (size), __gu_err);	\
+	long __gu_err;						\
+	unsigned long __gu_val;					\
+	const __typeof__(*(ptr)) __user *__gu_addr = (ptr);	\
+	__chk_user_ptr(ptr);					\
+	__get_user_size(__gu_val, __gu_addr, (size), __gu_err);	\
 	(x) = (__typeof__(*(ptr)))__gu_val;			\
 	__gu_err;						\
 })
 
 #define __get_user_check(x,ptr,size)					\
 ({									\
-	long __gu_err, __gu_val;					\
-	__typeof__(*(ptr)) *__pu_addr = (ptr);				\
-	__chk_user_ptr(__pu_addr);					\
-	if (likely(__addr_ok((unsigned long)(__pu_addr)))) {		\
-		__get_user_size(__gu_val, (__pu_addr), (size), __gu_err);\
-	} else {							\
-		__gu_err = -EFAULT;					\
-		__gu_val = 0;						\
-	}								\
+	long __gu_err = -EFAULT;					\
+	unsigned long __gu_val = 0;					\
+	const __typeof__(*(ptr)) *__gu_addr = (ptr);			\
+	if (likely(access_ok(VERIFY_READ, __gu_addr, (size))))		\
+		__get_user_size(__gu_val, __gu_addr, (size), __gu_err);	\
 	(x) = (__typeof__(*(ptr)))__gu_val;				\
 	__gu_err;							\
 })
@@ -199,7 +192,6 @@ extern void __get_user_unknown(void);
 #define __put_user_size(x,ptr,size,retval)		\
 do {							\
 	retval = 0;					\
-	__chk_user_ptr(ptr);				\
 	switch (size) {					\
 	case 1:						\
 		__put_user_asm(x, ptr, retval, "b");	\
@@ -218,22 +210,22 @@ do {							\
 	}						\
 } while (0)
 
-#define __put_user_nocheck(x,ptr,size)			\
-({							\
-	long __pu_err;					\
-	__put_user_size((x),(ptr),(size),__pu_err);	\
-	__pu_err;					\
+#define __put_user_nocheck(x,ptr,size)				\
+({								\
+	long __pu_err;						\
+	__typeof__(*(ptr)) __user *__pu_addr = (ptr);		\
+	__chk_user_ptr(ptr);					\
+	__put_user_size((x), __pu_addr, (size), __pu_err);	\
+	__pu_err;						\
 })
 
 #define __put_user_check(x,ptr,size)				\
 ({								\
-	long __pu_err;						\
+	long __pu_err = -EFAULT;				\
 	__typeof__(*(ptr)) __user *__pu_addr = (ptr);		\
-								\
-	if (likely(__addr_ok((unsigned long)__pu_addr)))	\
-		__put_user_size((x),__pu_addr,(size),__pu_err);	\
-	else							\
-		__pu_err = -EFAULT;				\
+	if (likely(access_ok(VERIFY_WRITE, __pu_addr, size)))	\
+		__put_user_size((x), __pu_addr, (size),		\
+				__pu_err);			\
 	__pu_err;						\
 })