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    Subject[PATCH 5/8] ldisc n_tty: add new method n_tty_inherit_ops()
    This new method can be used to init a new struct tty_ldisc_ops as the
    default tty_ldisc_N_TTY struct.

    Signed-off-by: Rodolfo Giometti <giometti@linux.it>
    ---
    drivers/char/n_tty.c | 9 +++++++++
    include/linux/tty.h | 1 +
    2 files changed, 10 insertions(+), 0 deletions(-)

    diff --git a/drivers/char/n_tty.c b/drivers/char/n_tty.c
    index 2e50f4d..0f11375 100644
    --- a/drivers/char/n_tty.c
    +++ b/drivers/char/n_tty.c
    @@ -48,6 +48,7 @@
    #include <linux/audit.h>
    #include <linux/file.h>
    #include <linux/uaccess.h>
    +#include <linux/module.h>

    #include <asm/system.h>

    @@ -2091,3 +2092,11 @@ struct tty_ldisc_ops tty_ldisc_N_TTY = {
    .receive_buf = n_tty_receive_buf,
    .write_wakeup = n_tty_write_wakeup
    };
    +
    +void n_tty_inherit_ops(struct tty_ldisc_ops *ops)
    +{
    + *ops = tty_ldisc_N_TTY;
    + ops->owner = NULL;
    + ops->refcount = ops->flags = 0;
    +}
    +EXPORT_SYMBOL_GPL(n_tty_inherit_ops);
    diff --git a/include/linux/tty.h b/include/linux/tty.h
    index f0f43d0..5091438 100644
    --- a/include/linux/tty.h
    +++ b/include/linux/tty.h
    @@ -485,6 +485,7 @@ extern void tty_ldisc_enable(struct tty_struct *tty);

    /* n_tty.c */
    extern struct tty_ldisc_ops tty_ldisc_N_TTY;
    +extern void n_tty_inherit_ops(struct tty_ldisc_ops *ops);

    /* tty_audit.c */
    #ifdef CONFIG_AUDIT
    --
    1.6.3.3


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