[RFC PATCH 1/4] workqueue: export attribute and sysfs setup helpers

[Huiwen He <huiwen.he@linux.dev>]

From: Huiwen He <hehuiwen@kylinos.cn>

The workqueue attribute helpers are not available to modules.

Export the allocation, application and release helpers for GPL modules.
Also export workqueue_sysfs_register() so a module can apply attributes
before exposing its queue in sysfs.

Signed-off-by: Huiwen He <hehuiwen@kylinos.cn>
---
 kernel/workqueue.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index 1ae3732a2c51..ec4709395594 100644
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -4822,6 +4822,7 @@ void free_workqueue_attrs(struct workqueue_attrs *attrs)
 		kfree(attrs);
 	}
 }
+EXPORT_SYMBOL_GPL(free_workqueue_attrs);
 
 /**
  * alloc_workqueue_attrs - allocate a workqueue_attrs
@@ -4850,6 +4851,7 @@ struct workqueue_attrs *alloc_workqueue_attrs_noprof(void)
 	free_workqueue_attrs(attrs);
 	return NULL;
 }
+EXPORT_SYMBOL_GPL(alloc_workqueue_attrs_noprof);
 
 static void copy_workqueue_attrs(struct workqueue_attrs *to,
 				 const struct workqueue_attrs *from)
@@ -5618,6 +5620,7 @@ int apply_workqueue_attrs(struct workqueue_struct *wq,
 
 	return ret;
 }
+EXPORT_SYMBOL_GPL(apply_workqueue_attrs);
 
 /**
  * unbound_wq_update_pwq - update a pwq slot for CPU hot[un]plug
@@ -7746,6 +7749,7 @@ int workqueue_sysfs_register(struct workqueue_struct *wq)
 	kobject_uevent(&wq_dev->dev.kobj, KOBJ_ADD);
 	return 0;
 }
+EXPORT_SYMBOL_GPL(workqueue_sysfs_register);
 
 /**
  * workqueue_sysfs_unregister - undo workqueue_sysfs_register()
-- 
2.43.0