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    SubjectSuspend 2 merge: 24/51: Keyboard and serial console hooks.
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    Here we add simple hooks so that the user can interact with suspend
    while it is running. (Hmm. The serial console condition could be
    simplified :>). The hooks allow you to do such things as:

    - cancel suspending
    - change the amount of detail of debugging info shown
    - change what debugging info is shown
    - pause the process
    - single step
    - toggle rebooting instead of powering down

    diff -ruN 702-keyboard-and-8250-hooks-old/drivers/char/keyboard.c 702-keyboard-and-8250-hooks-new/drivers/char/keyboard.c
    --- 702-keyboard-and-8250-hooks-old/drivers/char/keyboard.c 2004-11-24 18:50:00.959995424 +1100
    +++ 702-keyboard-and-8250-hooks-new/drivers/char/keyboard.c 2004-11-24 18:03:32.040404608 +1100
    @@ -33,6 +33,7 @@
    #include <linux/string.h>
    #include <linux/random.h>
    #include <linux/init.h>
    +#include <linux/suspend.h>
    #include <linux/slab.h>

    #include <linux/kbd_kern.h>
    @@ -1091,6 +1092,10 @@
    return;
    }
    #endif
    + if (down && (test_suspend_state(SUSPEND_RUNNING))) {
    + suspend_handle_keypress(keycode, SUSPEND_KEY_KEYBOARD);
    + return;
    + }
    #if defined(CONFIG_SPARC32) || defined(CONFIG_SPARC64)
    if (keycode == KEY_A && sparc_l1_a_state) {
    sparc_l1_a_state = 0;
    diff -ruN 702-keyboard-and-8250-hooks-old/drivers/serial/8250.c 702-keyboard-and-8250-hooks-new/drivers/serial/8250.c
    --- 702-keyboard-and-8250-hooks-old/drivers/serial/8250.c 2004-11-24 18:50:00.962994968 +1100
    +++ 702-keyboard-and-8250-hooks-new/drivers/serial/8250.c 2004-11-24 18:49:53.882071432 +1100
    @@ -39,6 +39,7 @@
    #include <linux/serial_core.h>
    #include <linux/serial.h>
    #include <linux/serial_8250.h>
    +#include <linux/suspend.h>

    #include <asm/io.h>
    #include <asm/irq.h>
    @@ -1068,6 +1069,15 @@
    }
    if (uart_handle_sysrq_char(&up->port, ch, regs))
    goto ignore_char;
    +
    +#if defined(CONFIG_SERIAL_CORE_CONSOLE) && defined(CONFIG_SOFTWARE_SUSPEND2)
    + if (test_suspend_state(SUSPEND_SANITY_CHECK_PROMPT) ||
    + test_suspend_state(SUSPEND_RUNNING)) {
    + suspend_handle_keypress(ch, SUSPEND_KEY_SERIAL);
    + goto ignore_char;
    + }
    +#endif
    +
    if ((lsr & up->port.ignore_status_mask) == 0) {
    tty_insert_flip_char(tty, ch, flag);
    }

    -
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