1 files changed, 7 insertions, 2 deletions

diff --git a/include/linux/tty.h b/include/linux/tty.h
index 97d660ed70c1..90b4fdc8a61f 100644
--- a/include/linux/tty.h
+++ b/include/linux/tty.h
@@ -39,10 +39,14 @@ struct tty_buffer {
         int size;
         int commit;
         int read;
+        int flags;
         /* Data points here */
         unsigned long data[0];
 };
 
+/* Values for .flags field of tty_buffer */
+#define TTYB_NORMAL     1       /* buffer has no flags buffer */
+
 static inline unsigned char *char_buf_ptr(struct tty_buffer *b, int ofs)
 {
         return ((unsigned char *)b->data) + ofs;
@@ -60,7 +64,8 @@ struct tty_bufhead {
         atomic_t           priority;
         struct tty_buffer sentinel;
         struct llist_head free;         /* Free queue head */
-        atomic_t           memory_used; /* In-use buffers excluding free list */
+        atomic_t           mem_used;    /* In-use buffers excluding free list */
+        int                mem_limit;
         struct tty_buffer *tail;        /* Active buffer */
 };
 /*
@@ -137,6 +142,7 @@ struct tty_bufhead {
 #define C_CLOCAL(tty)   _C_FLAG((tty), CLOCAL)
 #define C_CIBAUD(tty)   _C_FLAG((tty), CIBAUD)
 #define C_CRTSCTS(tty)  _C_FLAG((tty), CRTSCTS)
+#define C_CMSPAR(tty)   _C_FLAG((tty), CMSPAR)
 
 #define L_ISIG(tty)     _L_FLAG((tty), ISIG)
 #define L_ICANON(tty)   _L_FLAG((tty), ICANON)
@@ -422,7 +428,6 @@ extern int is_ignored(int sig);
 extern int tty_signal(int sig, struct tty_struct *tty);
 extern void tty_hangup(struct tty_struct *tty);
 extern void tty_vhangup(struct tty_struct *tty);
-extern void tty_vhangup_locked(struct tty_struct *tty);
 extern void tty_unhangup(struct file *filp);
 extern int tty_hung_up_p(struct file *filp);
 extern void do_SAK(struct tty_struct *tty);