1 files changed, 1 insertions, 1 deletions

diff --git a/arch/um/drivers/line.h b/arch/um/drivers/line.h
index 0c4dadf5e03e..471f477b271e 100644
--- a/arch/um/drivers/line.h
+++ b/arch/um/drivers/line.h
@@ -32,7 +32,7 @@ struct line_driver {
 
 struct line {
         struct tty_struct *tty;
-        spinlock_t count_lock;
+        struct mutex count_lock;
         unsigned long count;
         int valid;