From: Jiri Kosina <jkosina@xxxxxxx>
kthread freezing has been deprecated in favor of fs freezing. Issue
a warning if anyone attempts to still use this API.
Signed-off-by: Jiri Kosina <jkosina@xxxxxxx>
---
include/linux/freezer.h | 2 ++
kernel/freezer.c | 1 +
2 files changed, 3 insertions(+)
diff --git a/include/linux/freezer.h b/include/linux/freezer.h
index 81335f6..c0bc520 100644
--- a/include/linux/freezer.h
+++ b/include/linux/freezer.h
@@ -59,6 +59,8 @@ static inline bool try_to_freeze_unsafe(void)
static inline bool try_to_freeze(void)
{
+ WARN_ON(current->flags & PF_KTHREAD);
+
if (!(current->flags & PF_NOFREEZE))
debug_check_no_locks_held();
return try_to_freeze_unsafe();
diff --git a/kernel/freezer.c b/kernel/freezer.c
index a8900a3..fe2afb9 100644
--- a/kernel/freezer.c
+++ b/kernel/freezer.c
@@ -164,6 +164,7 @@ void __thaw_task(struct task_struct *p)
bool set_freezable(void)
{
might_sleep();
+ WARN_ON(current->flags & PF_KTHREAD);
/*
* Modify flags while holding freezer_lock. This ensures the
--
1.9.2
--
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