Update README.md

Author: zahrayousefijamarani

README.md

@@ -588,116 +588,36 @@ static int binder_thread_release(struct binder_proc *proc, struct binder_thread
 
 These lines have been added to source code:
 
-
-<table>
-  <tr>
-   <td><code>static int binder_thread_release(struct binder_proc *proc,</code>
-<p>
-<code>                                   struct<a href="https://code.woboq.org/linux/linux/drivers/android/binder.c.html#binder_thread"> binder_thread</a> *thread)</code>
-<code>{</code>
-<p>
-<code>      .</code>
-<p>
-<code>      .</code>
-<p>
-<code>      .</code>
-<p>
-<code>      /*	</code>
-<p>
-<code>      * If this thread used poll, make sure we remove the waitqueue</code>
-   </td>
-  </tr>
-  <tr>
-   <td><code>	 * from any epoll data structures holding it with POLLFREE.</code>
-   </td>
-  </tr>
-  <tr>
-   <td><code>	 * waitqueue_active() is safe to use here because we're holding</code>
-   </td>
-  </tr>
-  <tr>
-   <td><code>	 * the inner lock.</code>
-   </td>
-  </tr>
-  <tr>
-   <td><code>	 */</code>
-   </td>
-  </tr>
-  <tr>
-   <td><code>	if ((<a href="https://code.woboq.org/linux/linux/drivers/android/binder.c.html#1042thread">thread</a>-><a href="https://code.woboq.org/linux/linux/drivers/android/binder.c.html#binder_thread::looper">looper</a> &<a href="https://code.woboq.org/linux/linux/drivers/android/binder.c.html#BINDER_LOOPER_STATE_POLL"> BINDER_LOOPER_STATE_POLL</a>) &&</code>
-   </td>
-  </tr>
-  <tr>
-   <td><code>	   <a href="https://code.woboq.org/linux/linux/include/linux/wait.h.html#waitqueue_active"> waitqueue_active</a>(&<a href="https://code.woboq.org/linux/linux/drivers/android/binder.c.html#1042thread">thread</a>-><a href="https://code.woboq.org/linux/linux/drivers/android/binder.c.html#binder_thread::wait">wait</a>)) {</code>
-   </td>
-  </tr>
-  <tr>
-   <td><code><b>		<a href="https://code.woboq.org/linux/linux/include/linux/wait.h.html#211">wake_up_poll</a>(&<a href="https://code.woboq.org/linux/linux/drivers/android/binder.c.html#1042thread">thread</a>-><a href="https://code.woboq.org/linux/linux/drivers/android/binder.c.html#binder_thread::wait">wait</a>,<a href="https://code.woboq.org/linux/linux/include/uapi/linux/eventpoll.h.html#35"> EPOLLHUP</a> |<a href="https://code.woboq.org/linux/linux/include/uapi/asm-generic/poll.h.html#32"> POLLFREE</a>);</b></code>
-   </td>
-  </tr>
-  <tr>
-   <td><code>	}</code>
-   </td>
-  </tr>
-  <tr>
-   <td>
-   </td>
-  </tr>
-  <tr>
-   <td><code>	<a href="https://code.woboq.org/linux/linux/drivers/android/binder.c.html#706">binder_inner_proc_unlock</a>(<a href="https://code.woboq.org/linux/linux/drivers/android/binder.c.html#1042thread">thread</a>-><a href="https://code.woboq.org/linux/linux/drivers/android/binder.c.html#binder_thread::proc">proc</a>);</code>
-   </td>
-  </tr>
-  <tr>
-   <td>
-   </td>
-  </tr>
-  <tr>
-   <td><code>	/*</code>
-   </td>
-  </tr>
-  <tr>
-   <td><code>	 * This is needed to avoid races between wake_up_poll() above and</code>
-   </td>
-  </tr>
-  <tr>
-   <td><code>	 * and ep_remove_waitqueue() called for other reasons (eg the epoll file</code>
-   </td>
-  </tr>
-  <tr>
-   <td><code>	 * descriptor being closed); ep_remove_waitqueue() holds an RCU read</code>
-   </td>
-  </tr>
-  <tr>
-   <td><code>	 * lock, so we can be sure it's done after calling synchronize_rcu().</code>
-   </td>
-  </tr>
-  <tr>
-   <td><code>	 */</code>
-   </td>
-  </tr>
-  <tr>
-   <td><code>	if (<a href="https://code.woboq.org/linux/linux/drivers/android/binder.c.html#1042thread">thread</a>-><a href="https://code.woboq.org/linux/linux/drivers/android/binder.c.html#binder_thread::looper">looper</a> &<a href="https://code.woboq.org/linux/linux/drivers/android/binder.c.html#BINDER_LOOPER_STATE_POLL"> BINDER_LOOPER_STATE_POLL</a>)</code>
-   </td>
-  </tr>
-  <tr>
-   <td>
-<code>		    <a href="https://code.woboq.org/linux/linux/kernel/rcu/tree.c.html#synchronize_rcu">synchronize_rcu</a>();</code>
-
-<code>     .</code>
-<p>
-
-<code>     .</code>
-<p>
-
-<code>     .</code>
-<p>
-
-<code>}</code>
-   </td>
-  </tr>
-</table>
-
-
+<pre>
+static int binder_thread_release(struct binder_proc *proc,
+binder_thread *thread)
+{
+	.
+	.
+	.
+	/*
+	 * If this thread used poll, make sure we remove the waitqueue
+	 * from any epoll data structures holding it with POLLFREE.
+	 * waitqueue_active() is safe to use here because we're holding
+	 * the inner lock.
+	*/
+	  if ((thread->looper & BINDER_LOOPER_STATE_POLL) && waitqueue_active(&thread->wait)) {
+		wake_up_poll(&thread->wait, EPOLLHUP | POLLFREE);
+	  }
+	  binder_inner_proc_unlock(thread->proc);
+	  /*
+	   * This is needed to avoid races between wake_up_poll() above and
+	   * and ep_remove_waitqueue() called for other reasons (eg the epoll file
+	   * descriptor being closed); ep_remove_waitqueue() holds an RCU read
+	   * lock, so we can be sure it's done after calling synchronize_rcu().
+	  */
+	  if (thread->looper & BINDER_LOOPER_STATE_POLL)
+		synchronize_rcu();
+	  .
+	  .
+	  .
+}
+  
 see full code [here](https://code.woboq.org/linux/linux/drivers/android/binder.c.html#binder_thread_release)