[PATCH] sparse: __forced added to casts in arch-specific code

	Casts from __user to address-space-agnostic in amd64 and i386
made explicit (__force added; in these places we pass userland pointer
to arch-specific code that handles kernel and userland pointers the
same way).
	csum_partial_copy_*() annotated properly

arch/x86_64/lib/csum-wrappers.c

@@ -43,7 +43,7 @@ csum_partial_copy_from_user(const char __user *src, char *dst,
 				len -= 2;
 			}
 		}
-		isum = csum_partial_copy_generic((void *)src,dst,len,isum,errp,NULL);
+		isum = csum_partial_copy_generic((__force void *)src,dst,len,isum,errp,NULL);
 		if (likely(*errp == 0)) 
 			return isum;
 	} 
@@ -88,7 +88,7 @@ csum_partial_copy_to_user(const char *src, char __user *dst,
 	}
 
 	*errp = 0;
-	return csum_partial_copy_generic(src, (void *)dst,len,isum,NULL,errp); 
+	return csum_partial_copy_generic(src, (void __force *)dst,len,isum,NULL,errp); 
 } 
 
 EXPORT_SYMBOL(csum_partial_copy_to_user);

arch/x86_64/lib/usercopy.c

@@ -145,7 +145,7 @@ long strlen_user(const char __user *s)
 unsigned long copy_in_user(void __user *to, const void __user *from, unsigned len)
 {
 	if (access_ok(VERIFY_WRITE, to, len) && access_ok(VERIFY_READ, from, len)) { 
-		return copy_user_generic((void *)to, (void *)from, len);
+		return copy_user_generic((__force void *)to, (__force void *)from, len);
 	} 
 	return len;		
 }

include/asm-i386/checksum.h

@@ -43,10 +43,10 @@ unsigned int csum_partial_copy_nocheck ( const char *src, char *dst,
 }
 
 static __inline__
-unsigned int csum_partial_copy_from_user ( const char *src, char *dst,
+unsigned int csum_partial_copy_from_user ( const char __user *src, char *dst,
 						int len, int sum, int *err_ptr)
 {
-	return csum_partial_copy_generic ( src, dst, len, sum, err_ptr, NULL);
+	return csum_partial_copy_generic ( (__force char *)src, dst, len, sum, err_ptr, NULL);
 }
 
 /*
@@ -178,7 +178,7 @@ static __inline__ unsigned int csum_and_copy_to_user(const char *src,
 						     int *err_ptr)
 {
 	if (access_ok(VERIFY_WRITE, dst, len))
-		return csum_partial_copy_generic(src, dst, len, sum, NULL, err_ptr);
+		return csum_partial_copy_generic(src, (__force char *)dst, len, sum, NULL, err_ptr);
 
 	if (len)
 		*err_ptr = -EFAULT;

include/asm-x86_64/i387.h

@@ -138,7 +138,7 @@ static inline void save_init_fpu( struct task_struct *tsk )
  */
 static inline int restore_i387(struct _fpstate __user *buf)
 {
-	return restore_fpu_checking((struct i387_fxsave_struct *)buf);
+	return restore_fpu_checking((__force struct i387_fxsave_struct *)buf);
 }
 
 #endif /* __ASM_X86_64_I387_H */