所以,我正在尝试修改 evdev.c,它是一个事件处理程序驱动程序,用于 linux 上的鼠标等输入设备。
我遇到的问题是,当我尝试编译模块时,出现大量错误,提示找不到 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。
evdev 的结构清楚地存在于我正在编译的 mousedev_dbl.c 文件中。
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;
};
例如,这是它在第 215 行的使用方式。
spin_lock(&evdev->client_lock);
list_add_tail_rcu(&client->node, &evdev->client_list);
spin_unlock(&evdev->client_lock);
synchronize_rcu();
什么会导致这些错误?整个文件可以在这里找到:http: //lxr.free-electrons.com/source/drivers/input/evdev.c