Linux模块编译:未找到struct evdev成员

Question

因此，我正在尝试修改evdev.c，它是一个用于输入设备的事件处理程序驱动程序，比如linux上的鼠标。

我遇到的问题是，当我试图编译模块时，我得到了一大堆错误，说找不到evdev的成员。

/home/mousedev_dbl.c:215: error: ‘struct evdev’ has no member named ‘client_lock’
/home/mousedev_dbl.c:216: error: ‘struct evdev’ has no member named ‘client_list’
/hom/mousedev_dbl.c:217: error: ‘struct evdev’ has no member named ‘client_lock’
/home/mousedev_dbl.c: In function ‘evdev_detach_client’:
/home/mousedev_dbl.c:224: error: ‘struct evdev’ has no member named ‘client_lock’
/home/mousedev_dbl.c:226: error: ‘struct evdev’ has no member named ‘client_lock’
/home/mousedev_dbl.c: In function ‘evdev_open_device’:
/home/mousedev_dbl.c:234: error: ‘struct evdev’ has no member named ‘mutex’
/home/mousedev_dbl.c:238: error: ‘struct evdev’ has no member named ‘exist’

这只是错误的一小部分。

我正在编译的mousedev_dbl.c文件中清楚地显示了evdev的结构。

struct evdev {
      int open;
      int minor;
      struct input_handle handle;
      wait_queue_head_t wait;
      struct evdev_client __rcu *grab;
      struct list_head client_list;
      spinlock_t client_lock; /* protects client_list */
      struct mutex mutex;
      struct device dev;
      bool exist;
};

作为示例，这里是如何在第215行使用它的。

spin_lock(&evdev->client_lock);
list_add_tail_rcu(&client->node, &evdev->client_list);
spin_unlock(&evdev->client_lock);
synchronize_rcu();

是什么导致了这些错误？？可以在以下位置找到整个文件：http://lxr.free-electrons.com/source/drivers/input/evdev.c

Answer 1

问题是我使用了错误版本的内核源代码。2.6.38而不是2.6.35，因此头文件和源文件不能很好地混合。

Answer 2

struct evdev_client __rcu *grab;

这个声明有效吗？(在我看来不像，除非__rcu是用于预处理器的)。

看起来这个声明让你剩下的struct evdev变得乱码了。这可以解释编译器没有识别client_list、client_lock等。

Answer 3

在include/linux/ __rcu中，编译器被定义为

# define __rcu          __attribute__((noderef, address_space(4)))