[ Sasha's backport helper bot ]
Hi,
Found matching upstream commit: 900bbaae67e980945dec74d36f8afe0de7556d5a
WARNING: Author mismatch between patch and found commit:
Backport author: Wenshan Lan <jetlan9@xxxxxxx>
Commit author: Xuewen Yan <xuewen.yan@xxxxxxxxxx>
Status in newer kernel trees:
6.12.y | Not found
6.6.y | Not found
6.1.y | Not found
5.15.y | Not found
5.10.y | Not found
5.4.y | Not found
Note: The patch differs from the upstream commit:
---
1: 900bbaae67e9 ! 1: 90c173fa699e epoll: Add synchronous wakeup support for ep_poll_callback
@@ Commit message
Reviewed-by: Brian Geffon <bgeffon@xxxxxxxxxx>
Reported-by: Benoit Lize <lizeb@xxxxxxxxxx>
Signed-off-by: Christian Brauner <brauner@xxxxxxxxxx>
+ (cherry picked from commit 900bbaae67e980945dec74d36f8afe0de7556d5a)
+ [ Redefine wake_up_sync(x) as __wake_up_sync(x, TASK_NORMAL, 1) to
+ make it work on 5.4.y ]
+ Signed-off-by: Wenshan Lan <jetlan9@xxxxxxx>
## fs/eventpoll.c ##
@@ fs/eventpoll.c: static int ep_poll_callback(wait_queue_entry_t *wait, unsigned mode, int sync, v
@@ include/linux/wait.h: void __wake_up_pollfree(struct wait_queue_head *wq_head);
#define wake_up_all(x) __wake_up(x, TASK_NORMAL, 0, NULL)
#define wake_up_locked(x) __wake_up_locked((x), TASK_NORMAL, 1)
#define wake_up_all_locked(x) __wake_up_locked((x), TASK_NORMAL, 0)
-+#define wake_up_sync(x) __wake_up_sync(x, TASK_NORMAL)
++#define wake_up_sync(x) __wake_up_sync(x, TASK_NORMAL, 1)
#define wake_up_interruptible(x) __wake_up(x, TASK_INTERRUPTIBLE, 1, NULL)
#define wake_up_interruptible_nr(x, nr) __wake_up(x, TASK_INTERRUPTIBLE, nr, NULL)
---
Results of testing on various branches:
| Branch | Patch Apply | Build Test |
|---------------------------|-------------|------------|
| stable/linux-5.4.y | Success | Success |
