workqueue: mark WQ_NON_REENTRANT deprecated

dbf2576e37 ("workqueue: make all workqueues non-reentrant") made
WQ_NON_REENTRANT no-op but the following patches didn't remove the
flag or update the documentation.  Let's mark the flag deprecated and
update the documentation accordingly.

Signed-off-by: Tejun Heo <tj@kernel.org>

1 files changed, 6 insertions, 1 deletions

diff --git a/include/linux/workqueue.h b/include/linux/workqueue.h
index a0ed78ab54d7..594521ba0d43 100644
--- a/include/linux/workqueue.h
+++ b/include/linux/workqueue.h
@@ -295,7 +295,12 @@ static inline unsigned int work_static(struct work_struct *work) { return 0; }
  * Documentation/workqueue.txt.
  */
 enum {
-        WQ_NON_REENTRANT        = 1 << 0, /* guarantee non-reentrance */
+        /*
+         * All wqs are now non-reentrant making the following flag
+         * meaningless.  Will be removed.
+         */
+        WQ_NON_REENTRANT        = 1 << 0, /* DEPRECATED */
+
         WQ_UNBOUND              = 1 << 1, /* not bound to any cpu */
         WQ_FREEZABLE            = 1 << 2, /* freeze during suspend */
         WQ_MEM_RECLAIM          = 1 << 3, /* may be used for memory reclaim */