1 files changed, 6 insertions, 0 deletions

diff --git a/include/linux/tty.h b/include/linux/tty.h
index 3f4954c55e53..dfc77ded198a 100644
--- a/include/linux/tty.h
+++ b/include/linux/tty.h
@@ -253,6 +253,7 @@ struct tty_struct {
         unsigned int column;
         unsigned char lnext:1, erasing:1, raw:1, real_raw:1, icanon:1;
         unsigned char closing:1;
+        unsigned char echo_overrun:1;
         unsigned short minimum_to_wake;
         unsigned long overrun_time;
         int num_overrun;
@@ -262,11 +263,16 @@ struct tty_struct {
         int read_tail;
         int read_cnt;
         unsigned long read_flags[N_TTY_BUF_SIZE/(8*sizeof(unsigned long))];
+        unsigned char *echo_buf;
+        unsigned int echo_pos;
+        unsigned int echo_cnt;
         int canon_data;
         unsigned long canon_head;
         unsigned int canon_column;
         struct mutex atomic_read_lock;
         struct mutex atomic_write_lock;
+        struct mutex output_lock;
+        struct mutex echo_lock;
         unsigned char *write_buf;
         int write_cnt;
         spinlock_t read_lock;