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    Subject[PATCH] 2.4.3 and SysRq over serial console
    Hello all.  Without the attached patch, SysRq doesn't work over a serial
    console here. Has anyone else seen this problem?

    --
    Tom Rini (TR1265)
    http://gate.crashing.org/~trini/
    diff -Nru a/linux/drivers/char/n_tty.c b/linux/drivers/char/n_tty.c
    --- a/linux/drivers/char/n_tty.c Sat Mar 31 16:30:44 2001
    +++ b/linux/drivers/char/n_tty.c Sat Mar 31 16:30:44 2001
    @@ -40,6 +40,10 @@
    #include <linux/string.h>
    #include <linux/slab.h>
    #include <linux/poll.h>
    +#ifdef CONFIG_MAGIC_SYSRQ /* Handle the SysRq Hack */
    +#include <linux/sysrq.h>
    +#include <linux/console.h>
    +#endif

    #include <asm/uaccess.h>
    #include <asm/system.h>
    @@ -458,6 +462,12 @@

    static inline void n_tty_receive_break(struct tty_struct *tty)
    {
    +#ifdef CONFIG_MAGIC_SYSRQ /* Handle the SysRq Hack */
    + struct console *c = console_drivers;
    + if (c && c->device && (c->device(c) == tty->device)
    + && !test_and_change_bit(TTY_DOING_SYSRQ, &tty->flags))
    + return;
    +#endif
    if (I_IGNBRK(tty))
    return;
    if (I_BRKINT(tty)) {
    @@ -506,6 +516,12 @@
    {
    unsigned long flags;

    +#ifdef CONFIG_MAGIC_SYSRQ /* Handle the SysRq Hack */
    + if (test_and_clear_bit(TTY_DOING_SYSRQ, &tty->flags)) {
    + handle_sysrq(c, NULL, NULL, tty);
    + return;
    + }
    +#endif
    if (tty->raw) {
    put_tty_queue(c, tty);
    return;
    diff -Nru a/linux/include/linux/tty.h b/linux/include/linux/tty.h
    --- a/linux/include/linux/tty.h Sat Mar 31 16:30:44 2001
    +++ b/linux/include/linux/tty.h Sat Mar 31 16:30:44 2001
    @@ -329,6 +329,9 @@
    #define TTY_PUSH 6
    #define TTY_CLOSING 7
    #define TTY_DONT_FLIP 8
    +#ifdef CONFIG_MAGIC_SYSRQ /* Handle the SysRq Hack */
    +#define TTY_DOING_SYSRQ 9
    +#endif
    #define TTY_HW_COOK_OUT 14
    #define TTY_HW_COOK_IN 15
    #define TTY_PTY_LOCK 16
    \
     
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      Last update: 2005-03-22 13:22    [W:0.035 / U:32.284 seconds]
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