Unverified Commit 41270316 authored Apr 09, 2024 by openeuler-ci-bot Committed by Gitee Apr 09, 2024

!4800 [sync] PR-4764: binder: signal epoll threads of self-work

Merge Pull Request from: @openeuler-sync-bot 
 

Origin pull request: 
https://gitee.com/openeuler/kernel/pulls/4764 
 
PR sync from: Zhang Xiaoxu <zhangxiaoxu5@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/3MRGQHW2R2LA46ZH6DMHUTX2CCUXKARV/ 
 
https://gitee.com/src-openeuler/kernel/issues/I93X0G 
 
Link:https://gitee.com/openeuler/kernel/pulls/4800

 

Reviewed-by: Jialin Zhang <zhangjialin11@huawei.com>
Signed-off-by: Jialin Zhang <zhangjialin11@huawei.com>

parents e3b0e543 b5f66839

drivers/android/binder.c

+10 −0

Original line number	Diff line number	Diff line
		@@ -836,6 +836,16 @@ binder_enqueue_thread_work_ilocked(struct binder_thread *thread,
		{
		WARN_ON(!list_empty(&thread->waiting_thread_node));
		binder_enqueue_work_ilocked(work, &thread->todo);

		/* (e)poll-based threads require an explicit wakeup signal when
		* queuing their own work; they rely on these events to consume
		* messages without I/O block. Without it, threads risk waiting
		* indefinitely without handling the work.
		*/
		if (thread->looper & BINDER_LOOPER_STATE_POLL &&
		thread->pid == current->pid && !thread->process_todo)
		wake_up_interruptible_sync(&thread->wait);

		thread->process_todo = true;
		}