[PATCH] fix compat_sys_getrusage

compat_sys_getrusage was returning the result of a logical or. Make
it return the result of sys_getrusage if it fails or -EFAULT if we
cant write it out to userspace.

kernel/compat.c

@@ -349,7 +349,11 @@ asmlinkage long compat_sys_getrusage(int who, struct compat_rusage *ru)
 	ret = sys_getrusage(who, &r);
 	set_fs(old_fs);
 
-	return ret || put_compat_rusage(ru, &r);
+	if (ret)
+		return ret;
+
+	if (put_compat_rusage(ru, &r))
+		return -EFAULT;
 }
 
 asmlinkage long