TTY: serialP, remove unused material

First, remove unused macro and rs_multiport_struct structure. Nobody
uses them at all.

Further, the 2 drivers (they are below) which use the rest of
structures from serialP.h (async_struct and serial_state) do not use
all the members. Remove the members:
* which are unused or
* which are only initialized and never used for something real.

Everybody should avoid the structures with a looong distance.

Finally, remove the ALPHA kludge MCR quirks. They are 1:1 copy from
8250.h. No need to redefine them here.

The 2 promised users of the structures:
arch/ia64/hp/sim/simserial.c
drivers/tty/amiserial.c

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

3 files changed, 1 insertions, 74 deletions

diff --git a/arch/ia64/hp/sim/simserial.c b/arch/ia64/hp/sim/simserial.c
index 2a2fe0c56119..9890b58960a7 100644
--- a/arch/ia64/hp/sim/simserial.c
+++ b/arch/ia64/hp/sim/simserial.c
@@ -72,7 +72,7 @@ static char *serial_version = "0.6";
  */
 static struct serial_state rs_table[NR_PORTS]={
   /* UART CLK   PORT IRQ     FLAGS        */
-  { 0, BASE_BAUD, 0x3F8, 0, STD_COM_FLAGS,0,PORT_16550 }  /* ttyS0 */
+  { BASE_BAUD, 0x3F8, 0, STD_COM_FLAGS, PORT_16550 }  /* ttyS0 */
 };
 
 /*
@@ -194,11 +194,6 @@ static irqreturn_t rs_interrupt_single(int irq, void *dev_id)
  * -------------------------------------------------------------------
  */
 
-static void do_softint(struct work_struct *private_)
-{
-        printk(KERN_ERR "simserial: do_softint called\n");
-}
-
 static int rs_put_char(struct tty_struct *tty, unsigned char ch)
 {
         struct async_struct *info = (struct async_struct *)tty->driver_data;
@@ -641,13 +636,10 @@ static int get_async_struct(int line, struct async_struct **ret_info)
         }
         init_waitqueue_head(&info->open_wait);
         init_waitqueue_head(&info->close_wait);
-        init_waitqueue_head(&info->delta_msr_wait);
-        info->magic = SERIAL_MAGIC;
         info->port = sstate->port;
         info->flags = sstate->flags;
         info->xmit_fifo_size = sstate->xmit_fifo_size;
         info->line = line;
-        INIT_WORK(&info->work, do_softint);
         info->state = sstate;
         if (sstate->info) {
                 kfree(info);
diff --git a/drivers/tty/amiserial.c b/drivers/tty/amiserial.c
index 753286257554..c6d8913dd6f6 100644
--- a/drivers/tty/amiserial.c
+++ b/drivers/tty/amiserial.c
@@ -473,7 +473,6 @@ static irqreturn_t ser_rx_int(int irq, void *dev_id)
                 return IRQ_NONE;
 
         receive_chars(info);
-        info->last_active = jiffies;
 #ifdef SERIAL_DEBUG_INTR
         printk("end.\n");
 #endif
@@ -494,7 +493,6 @@ static irqreturn_t ser_tx_int(int irq, void *dev_id)
                 return IRQ_NONE;
 
           transmit_chars(info);
-          info->last_active = jiffies;
 #ifdef SERIAL_DEBUG_INTR
           printk("end.\n");
 #endif
@@ -828,7 +826,6 @@ static void change_speed(struct async_struct *info,
         mb();
         }
 
-        info->LCR = cval;                               /* Save LCR */
         local_irq_restore(flags);
 }
 
@@ -1743,7 +1740,6 @@ static int get_async_struct(int line, struct async_struct **ret_info)
         init_waitqueue_head(&info->close_wait);
         init_waitqueue_head(&info->delta_msr_wait);
 #endif
-        info->magic = SERIAL_MAGIC;
         info->port = sstate->port;
         info->flags = sstate->flags;
         info->xmit_fifo_size = sstate->xmit_fifo_size;
@@ -1840,7 +1836,6 @@ static inline void line_info(struct seq_file *m, struct serial_state *state)
         if (!info) {
                 info = &scr_info;       /* This is just for serial_{in,out} */
 
-                info->magic = SERIAL_MAGIC;
                 info->flags = state->flags;
                 info->quot = 0;
                 info->tty = NULL;
@@ -1987,7 +1982,6 @@ static int __init amiga_serial_probe(struct platform_device *pdev)
                 goto fail_put_tty_driver;
 
         state = rs_table;
-        state->magic = SSTATE_MAGIC;
         state->port = (int)&custom.serdatr; /* Just to give it a value */
         state->line = 0;
         state->custom_divisor = 0;
diff --git a/include/linux/serialP.h b/include/linux/serialP.h
index ec27b34bbbd6..c1acdb2c8584 100644
--- a/include/linux/serialP.h
+++ b/include/linux/serialP.h
@@ -26,32 +26,23 @@
 #include <linux/wait.h>
 
 struct serial_state {
-        int     magic;
         int     baud_base;
         unsigned long   port;
         int     irq;
         int     flags;
-        int     hub6;
         int     type;
         int     line;
-        int     revision;       /* Chip revision (950) */
         int     xmit_fifo_size;
         int     custom_divisor;
         int     count;
-        u8      *iomem_base;
-        u16     iomem_reg_shift;
         unsigned short  close_delay;
         unsigned short  closing_wait; /* time to wait before closing */
         struct async_icount     icount; 
-        int     io_type;
         struct async_struct *info;
-        struct pci_dev  *dev;
 };
 
 struct async_struct {
-        int                     magic;
         unsigned long           port;
-        int                     hub6;
         int                     flags;
         int                     xmit_fifo_size;
         struct serial_state     *state;
@@ -63,21 +54,12 @@ struct async_struct {
         int                     x_char; /* xon/xoff character */
         int                     close_delay;
         unsigned short          closing_wait;
-        unsigned short          closing_wait2; /* obsolete */
         int                     IER;    /* Interrupt Enable Register */
         int                     MCR;    /* Modem control register */
-        int                     LCR;    /* Line control register */
-        int                     ACR;     /* 16950 Additional Control Reg. */
         unsigned long           event;
-        unsigned long           last_active;
         int                     line;
         int                     blocked_open; /* # of blocked opens */
         struct circ_buf         xmit;
-        spinlock_t              xmit_lock;
-        u8                      *iomem_base;
-        u16                     iomem_reg_shift;
-        int                     io_type;
-        struct work_struct                      work;
         struct tasklet_struct   tlet;
         wait_queue_head_t       open_wait;
         wait_queue_head_t       close_wait;
@@ -86,51 +68,10 @@ struct async_struct {
         struct async_struct     *prev_port;
 };
 
-#define CONFIGURED_SERIAL_PORT(info) ((info)->port || ((info)->iomem_base))
-
-#define SERIAL_MAGIC 0x5301
-#define SSTATE_MAGIC 0x5302
-
 /*
  * Events are used to schedule things to happen at timer-interrupt
  * time, instead of at rs interrupt time.
  */
 #define RS_EVENT_WRITE_WAKEUP   0
 
-/*
- * Multiport serial configuration structure --- internal structure
- */
-struct rs_multiport_struct {
-        int             port1;
-        unsigned char   mask1, match1;
-        int             port2;
-        unsigned char   mask2, match2;
-        int             port3;
-        unsigned char   mask3, match3;
-        int             port4;
-        unsigned char   mask4, match4;
-        int             port_monitor;
-};
-
-#if defined(__alpha__) && !defined(CONFIG_PCI)
-/*
- * Digital did something really horribly wrong with the OUT1 and OUT2
- * lines on at least some ALPHA's.  The failure mode is that if either
- * is cleared, the machine locks up with endless interrupts.
- *
- * This is still used by arch/mips/au1000/common/serial.c for some weird
- * reason (mips != alpha!)
- */
-#define ALPHA_KLUDGE_MCR  (UART_MCR_OUT2 | UART_MCR_OUT1)
-#elif defined(CONFIG_SBC8560)
-/*
- * WindRiver did something similarly broken on their SBC8560 board. The
- * UART tristates its IRQ output while OUT2 is clear, but they pulled
- * the interrupt line _up_ instead of down, so if we register the IRQ
- * while the UART is in that state, we die in an IRQ storm. */
-#define ALPHA_KLUDGE_MCR (UART_MCR_OUT2)
-#else
-#define ALPHA_KLUDGE_MCR 0
-#endif
-
 #endif /* _LINUX_SERIAL_H */