ptrace: cleanup arch_ptrace() on MIPS

Use new 'addrp', 'datavp' and 'datalp' variables in order to remove
unnecessary castings.

Signed-off-by: Namhyung Kim <namhyung@gmail.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

arch/mips/kernel/ptrace.c

@@ -259,6 +259,9 @@ long arch_ptrace(struct task_struct *child, long request,
 		 unsigned long addr, unsigned long data)
 {
 	int ret;
+	void __user *addrp = (void __user *) addr;
+	void __user *datavp = (void __user *) data;
+	unsigned long __user *datalp = (void __user *) data;
 
 	switch (request) {
 	/* when I and D space are separate, these will need to be fixed. */
@@ -387,7 +390,7 @@ long arch_ptrace(struct task_struct *child, long request,
 			ret = -EIO;
 			goto out;
 		}
-		ret = put_user(tmp, (unsigned long __user *) data);
+		ret = put_user(tmp, datalp);
 		break;
 	}
 
@@ -479,34 +482,31 @@ long arch_ptrace(struct task_struct *child, long request,
 		}
 
 	case PTRACE_GETREGS:
-		ret = ptrace_getregs(child, (__s64 __user *) data);
+		ret = ptrace_getregs(child, datavp);
 		break;
 
 	case PTRACE_SETREGS:
-		ret = ptrace_setregs(child, (__s64 __user *) data);
+		ret = ptrace_setregs(child, datavp);
 		break;
 
 	case PTRACE_GETFPREGS:
-		ret = ptrace_getfpregs(child, (__u32 __user *) data);
+		ret = ptrace_getfpregs(child, datavp);
 		break;
 
 	case PTRACE_SETFPREGS:
-		ret = ptrace_setfpregs(child, (__u32 __user *) data);
+		ret = ptrace_setfpregs(child, datavp);
 		break;
 
 	case PTRACE_GET_THREAD_AREA:
-		ret = put_user(task_thread_info(child)->tp_value,
-				(unsigned long __user *) data);
+		ret = put_user(task_thread_info(child)->tp_value, datalp);
 		break;
 
 	case PTRACE_GET_WATCH_REGS:
-		ret = ptrace_get_watch_regs(child,
-					(struct pt_watch_regs __user *) addr);
+		ret = ptrace_get_watch_regs(child, addrp);
 		break;
 
 	case PTRACE_SET_WATCH_REGS:
-		ret = ptrace_set_watch_regs(child,
-					(struct pt_watch_regs __user *) addr);
+		ret = ptrace_set_watch_regs(child, addrp);
 		break;
 
 	default: