--- serial.c.orig       Tue Feb 26 04:37:57 2002
+++ serial.c    Fri Sep 27 14:32:21 2002
@@ -95,7 +95,7 @@
 #include <linux/config.h>
 #include <linux/version.h>

-#undef SERIAL_PARANOIA_CHECK
+#define SERIAL_PARANOIA_CHECK /* #undef SERIAL_PARANOIA_CHECK:有効にします */
 #define CONFIG_SERIAL_NOPAUSE_IO
 #define SERIAL_DO_RESTART

@@ -129,13 +129,13 @@
 #endif

 /* Set of debugging defines */
-
-#undef SERIAL_DEBUG_INTR
-#undef SERIAL_DEBUG_OPEN
-#undef SERIAL_DEBUG_FLOW
-#undef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
-#undef SERIAL_DEBUG_PCI
+#define DBG_PRINT printk /* 今回追加したprintkの定義を区別しています */
+#define SERIAL_DEBUG_INTR /* #undef SERIAL_DEBUG_INTR:有効にします */
+#define SERIAL_DEBUG_OPEN /* #undef SERIAL_DEBUG_OPEN:有効にします */
+#define SERIAL_DEBUG_FLOW /* #undef SERIAL_DEBUG_FLOW:有効にします */
+#define SERIAL_DEBUG_RS_WAIT_UNTIL_SENT /* #undef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT */
 #undef SERIAL_DEBUG_AUTOCONF
+#define SERIAL_DEBUG_AUTOCONF /* #undef SERIAL_DEBUG_AUTOCONF:有効にします */

 /* Sanity checks */

@@ -494,6 +494,7 @@
        struct async_struct *info = (struct async_struct *)tty->driver_data;
        unsigned long flags;

+       DBG_PRINT("**enter: rs_stop\n"); /* rs_stop()の入口 */
        if (serial_paranoia_check(info, tty->device, "rs_stop"))
                return;

@@ -507,13 +508,15 @@
                serial_icr_write(info, UART_ACR, info->ACR);
        }
        restore_flags(flags);
+       DBG_PRINT("**exit: rs_stop\n"); /* rs_stop()の出口 */
 }

 static void rs_start(struct tty_struct *tty)
 {
        struct async_struct *info = (struct async_struct *)tty->driver_data;
        unsigned long flags;
-
+
+       DBG_PRINT("**enter: rs_start\n"); /* rs_start()の入口 */
        if (serial_paranoia_check(info, tty->device, "rs_start"))
                return;

@@ -529,6 +532,7 @@
                serial_icr_write(info, UART_ACR, info->ACR);
        }
        restore_flags(flags);
+       DBG_PRINT("**exit: rs_start\n"); /* rs_start()の出口 */
 }

 /*
@@ -1718,6 +1722,8 @@
        info->timeout = ((info->xmit_fifo_size*HZ*bits*quot) / baud_base);
        info->timeout += HZ/50;         /* Add .02 seconds of slop */

+       DBG_PRINT("**Divisor = %04x\n", quot); /* 設定するDivisor値の表示 */
+
        /* Set up FIFO's */
        if (uart_config[info->state->type].flags & UART_USE_FIFO) {
                if ((info->state->baud_base / quot) < 2400)
@@ -5352,6 +5358,8 @@
        int i;
        struct serial_state * state;

+       DBG_PRINT("**enter: rs_init()\n"); /* rs_init()の入口 */
+
        init_bh(SERIAL_BH, do_serial_bh);
        init_timer(&serial_timer);
        serial_timer.function = rs_timer;
@@ -5510,6 +5518,9 @@
 #ifdef ENABLE_SERIAL_PNP
        probe_serial_pnp();
 #endif
+
+       DBG_PRINT("**exit: rs_init()\n"); /* rs_init()の出口 */
+
        return 0;
 }

@@ -5679,7 +5690,8 @@
        int i;
        struct async_struct *info;

-       /* printk("Unloading %s: version %s\n", serial_name, serial_version); */
+       printk("Unloading %s: version %s\n", serial_name, serial_version);
+       DBG_PRINT("**enter: rs_fini()\n"); /* rs_fini()の入口 */
        del_timer_sync(&serial_timer);
        save_flags(flags); cli();
         remove_bh(SERIAL_BH);
@@ -5732,6 +5744,7 @@
        if (serial_pci_driver.name[0])
                pci_unregister_driver (&serial_pci_driver);
 #endif
+       DBG_PRINT("**exit: rs_fini()\n"); /* rs_fini()の出口 */
 }

 module_init(rs_init);