Revert "workqueue.c: Increase workqueue name length"

This reverts commit 43f0cec which is commit
31c8900 upstream.

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

Reported-by: Thorsten Leemhuis <[email protected]>
Cc: Tejun Heo <[email protected]>
Cc: Marek Szyprowski <[email protected]>
Cc: Nathan Chancellor <[email protected]>
Cc: Sasha Levin <[email protected]>
Cc: Audra Mitchell <[email protected]>
Link: https://lore.kernel.org/all/[email protected]/
Signed-off-by: Greg Kroah-Hartman <[email protected]>

Author: gregkh

kernel/workqueue.c

@@ -108,7 +108,7 @@ enum {
 	RESCUER_NICE_LEVEL	= MIN_NICE,
 	HIGHPRI_NICE_LEVEL	= MIN_NICE,
 
-	WQ_NAME_LEN		= 32,
+	WQ_NAME_LEN		= 24,
 };
 
 /*
@@ -4666,7 +4666,6 @@ struct workqueue_struct *alloc_workqueue(const char *fmt,
 	va_list args;
 	struct workqueue_struct *wq;
 	struct pool_workqueue *pwq;
-	int len;
 
 	/*
 	 * Unbound && max_active == 1 used to imply ordered, which is no longer
@@ -4693,12 +4692,9 @@ struct workqueue_struct *alloc_workqueue(const char *fmt,
 	}
 
 	va_start(args, max_active);
-	len = vsnprintf(wq->name, sizeof(wq->name), fmt, args);
+	vsnprintf(wq->name, sizeof(wq->name), fmt, args);
 	va_end(args);
 
-	if (len >= WQ_NAME_LEN)
-		pr_warn_once("workqueue: name exceeds WQ_NAME_LEN. Truncating to: %s\n", wq->name);
-
 	max_active = max_active ?: WQ_DFL_ACTIVE;
 	max_active = wq_clamp_max_active(max_active, flags, wq->name);