[PATCH] PM / suspend: show workqueues busy name in suspend flow

When suspend flow is aborted because of workqueues busy,
show workqueues busy name for debug purpose.

Signed-off-by: Roger Lu <redacted>
---
 include/linux/workqueue.h |  1 +
 kernel/power/process.c    |  3 +++
 kernel/workqueue.c        | 35 +++++++++++++++++++++++++++++++++++
 3 files changed, 39 insertions(+)

diff --git a/include/linux/workqueue.h b/include/linux/workqueue.h
index ca73c50..c9f9b24 100644
--- a/include/linux/workqueue.h
+++ b/include/linux/workqueue.h

@@ -609,6 +609,7 @@ long work_on_cpu(int cpu, long (*fn)(void *), void
 *arg);
 #ifdef CONFIG_FREEZER
 extern void freeze_workqueues_begin(void);
 extern bool freeze_workqueues_busy(void);
+extern void show_workqueues_busy(void);
 extern void thaw_workqueues(void);
 #endif /* CONFIG_FREEZER */
 

diff --git a/kernel/power/process.c b/kernel/power/process.c
index df058be..b538881 100644
--- a/kernel/power/process.c
+++ b/kernel/power/process.c

@@ -89,6 +89,9 @@ static int try_to_freeze_tasks(bool user_only)
 		       elapsed_msecs / 1000, elapsed_msecs % 1000,
 		       todo - wq_busy, wq_busy);
 
+		if (wq_busy)
+			show_workqueues_busy();