From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Date: Wed, 3 Apr 2024 14:29:22 +0000 (+0200)
Subject: Revert "workqueue: Replace pwq_activate_inactive_work() with [__]pwq_activate_work()"
X-Git-Tag: v6.8.4~4
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=c2f420eb270bc718a73c669d4655d5aabcec4c9e;p=thirdparty%2Fkernel%2Fstable.git

Revert "workqueue: Replace pwq_activate_inactive_work() with [__]pwq_activate_work()"

This reverts commit f4505c2033ad25839f6fd9be6fc474b8306c44eb which is commit
4c6380305d21e36581b451f7337a36c93b64e050 upstream.

The workqueue patches backported to 6.8.y caused some reported
regressions, so revert them for now.

Reported-by: Thorsten Leemhuis <regressions@leemhuis.info>
Cc: Tejun Heo <tj@kernel.org>
Cc: Marek Szyprowski <m.szyprowski@samsung.com>
Cc: Nathan Chancellor <nathan@kernel.org>
Cc: Sasha Levin <sashal@kernel.org>
Cc: Audra Mitchell <audra@redhat.com>
Link: https://lore.kernel.org/all/ce4c2f67-c298-48a0-87a3-f933d646c73b@leemhuis.info/
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index 7e1b0238158ea..6d0f64b5918ba 100644
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -1461,36 +1461,16 @@ static bool pwq_is_empty(struct pool_workqueue *pwq)
 	return !pwq->nr_active && list_empty(&pwq->inactive_works);
 }
 
-static void __pwq_activate_work(struct pool_workqueue *pwq,
-				struct work_struct *work)
+static void pwq_activate_inactive_work(struct work_struct *work)
 {
+	struct pool_workqueue *pwq = get_work_pwq(work);
+
 	trace_workqueue_activate_work(work);
 	if (list_empty(&pwq->pool->worklist))
 		pwq->pool->watchdog_ts = jiffies;
 	move_linked_works(work, &pwq->pool->worklist, NULL);
 	__clear_bit(WORK_STRUCT_INACTIVE_BIT, work_data_bits(work));
-}
-
-/**
- * pwq_activate_work - Activate a work item if inactive
- * @pwq: pool_workqueue @work belongs to
- * @work: work item to activate
- *
- * Returns %true if activated. %false if already active.
- */
-static bool pwq_activate_work(struct pool_workqueue *pwq,
-			      struct work_struct *work)
-{
-	struct worker_pool *pool = pwq->pool;
-
-	lockdep_assert_held(&pool->lock);
-
-	if (!(*work_data_bits(work) & WORK_STRUCT_INACTIVE))
-		return false;
-
 	pwq->nr_active++;
-	__pwq_activate_work(pwq, work);
-	return true;
 }
 
 static void pwq_activate_first_inactive(struct pool_workqueue *pwq)
@@ -1498,7 +1478,7 @@ static void pwq_activate_first_inactive(struct pool_workqueue *pwq)
 	struct work_struct *work = list_first_entry(&pwq->inactive_works,
 						    struct work_struct, entry);
 
-	pwq_activate_work(pwq, work);
+	pwq_activate_inactive_work(work);
 }
 
 /**
@@ -1636,7 +1616,8 @@ static int try_to_grab_pending(struct work_struct *work, bool is_dwork,
 		 * management later on and cause stall.  Make sure the work
 		 * item is activated before grabbing.
 		 */
-		pwq_activate_work(pwq, work);
+		if (*work_data_bits(work) & WORK_STRUCT_INACTIVE)
+			pwq_activate_inactive_work(work);
 
 		list_del_init(&work->entry);
 		pwq_dec_nr_in_flight(pwq, *work_data_bits(work));