1 files changed, 0 insertions, 2 deletions

diff --git a/drivers/usb/serial/pl2303.c b/drivers/usb/serial/pl2303.c
index 9ffff193823..0eb883f44ad 100644
--- a/drivers/usb/serial/pl2303.c
+++ b/drivers/usb/serial/pl2303.c
@@ -43,8 +43,6 @@ static int debug;
 #define PL2303_BUF_SIZE         1024
 #define PL2303_TMP_BUF_SIZE     1024
 
-static DECLARE_MUTEX(pl2303_tmp_buf_sem);
-
 struct pl2303_buf {
         unsigned int    buf_size;
         char            *buf_buf;