tty: Ldisc revamp

Move the line disciplines towards a conventional ->ops arrangement.  For
the moment the actual 'tty_ldisc' struct in the tty is kept as part of
the tty struct but this can then be changed if it turns out that when it
all settles down we want to refcount ldiscs separately to the tty.

Pull the ldisc code out of /proc and put it with our ldisc code.

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2 files changed, 6 insertions, 5 deletions

diff --git a/drivers/char/ip2/i2lib.c b/drivers/char/ip2/i2lib.c
index 938879cc7bc..0061e18aff6 100644
--- a/drivers/char/ip2/i2lib.c
+++ b/drivers/char/ip2/i2lib.c
@@ -868,11 +868,11 @@ i2Input(i2ChanStrPtr pCh)
                 amountToMove = count;
         }
         // Move the first block
-        pCh->pTTY->ldisc.receive_buf( pCh->pTTY, 
+        pCh->pTTY->ldisc.ops->receive_buf( pCh->pTTY,
                  &(pCh->Ibuf[stripIndex]), NULL, amountToMove );
         // If we needed to wrap, do the second data move
         if (count > amountToMove) {
-                pCh->pTTY->ldisc.receive_buf( pCh->pTTY, 
+                pCh->pTTY->ldisc.ops->receive_buf( pCh->pTTY,
                  pCh->Ibuf, NULL, count - amountToMove );
         }
         // Bump and wrap the stripIndex all at once by the amount of data read. This
diff --git a/drivers/char/ip2/ip2main.c b/drivers/char/ip2/ip2main.c
index 9a2394cda94..5dc74404058 100644
--- a/drivers/char/ip2/ip2main.c
+++ b/drivers/char/ip2/ip2main.c
@@ -1289,11 +1289,12 @@ static void do_input(struct work_struct *work)
 // code duplicated from n_tty (ldisc)
 static inline void  isig(int sig, struct tty_struct *tty, int flush)
 {
+        /* FIXME: This is completely bogus */
         if (tty->pgrp)
                 kill_pgrp(tty->pgrp, sig, 1);
         if (flush || !L_NOFLSH(tty)) {
-                if ( tty->ldisc.flush_buffer )  
-                        tty->ldisc.flush_buffer(tty);
+                if ( tty->ldisc.ops->flush_buffer )  
+                        tty->ldisc.ops->flush_buffer(tty);
                 i2InputFlush( tty->driver_data );
         }
 }
@@ -1342,7 +1343,7 @@ static void do_status(struct work_struct *work)
                 }
                 tmp = pCh->pTTY->real_raw;
                 pCh->pTTY->real_raw = 0;
-                pCh->pTTY->ldisc.receive_buf( pCh->pTTY, &brkc, &brkf, 1 );
+                pCh->pTTY->ldisc->ops.receive_buf( pCh->pTTY, &brkc, &brkf, 1 );
                 pCh->pTTY->real_raw = tmp;
         }
 #endif /* NEVER_HAPPENS_AS_SETUP_XXX */