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    SubjectRe: [PATCH][7/8] kgdb: exclusive use kgdb8250 uart I/O driver
    Hi!

    > This patch some small hooks into the normal serial core so that a uart
    > can be unregistered to be exclusively used for KGDB. These changes
    > allow for registering and unregistering a port with a struct
    > uart_port. From that point on KGDB does raw accesses to the serial
    > IO ports it has taken over.
    >
    > CC: linux-serial@vger.kernel.org
    > Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
    > Signed-off-by: Jan Kiszka <jan.kiszka@web.de>
    > Signed-off-by: Ingo Molnar <mingo@elte.hu>
    > Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
    > ---
    > Documentation/DocBook/kgdb.tmpl | 44 ++++
    > drivers/serial/8250.c | 30 +++
    > drivers/serial/8250_kgdb.c | 489 +++++++++++++++++++++++++++++++++++++++
    > drivers/serial/Kconfig | 2 +-
    > drivers/serial/Makefile | 1 +
    > drivers/serial/serial_core.c | 18 ++-
    > include/linux/serial_8250.h | 2 +
    > lib/Kconfig.kgdb | 21 ++
    > 8 files changed, 603 insertions(+), 4 deletions(-)
    > create mode 100644 drivers/serial/8250_kgdb.c
    >
    > diff --git a/Documentation/DocBook/kgdb.tmpl b/Documentation/DocBook/kgdb.tmpl
    > index c423411..111a2a0 100644
    > --- a/Documentation/DocBook/kgdb.tmpl
    > +++ b/Documentation/DocBook/kgdb.tmpl
    > @@ -92,6 +92,50 @@
    > <chapter id="BootingTheKernel">
    > <title>Booting the kernel</title>
    > <para>
    > + The Kernel command line option <constant>kgdbwait</constant> makes kgdb
    > + wait for gdb connection during booting of a kernel. If the
    > + <symbol>CONFIG_KGDB_8250</symbol> driver is used (or if applicable,
    > + another serial driver) this breakpoint will happen very early on, before
    > + console output.
    > + </para>

    I believe we already have command line options listed in different
    file... and in readable format, too.


    > --- /dev/null
    > +++ b/drivers/serial/8250_kgdb.c
    > @@ -0,0 +1,489 @@
    > +/*
    > + * 8250 serial I/O driver for KGDB.
    > + *
    > + * This is a merging of many different drivers, and all of the people have
    > + * had an impact in some form or another:
    > + *
    > + * 2004-2005 (c) MontaVista Software, Inc.
    > + * 2005-2006 (c) Wind River Systems, Inc.

    Hmm, is it WindRiver or
    WinDriver? :-)


    --
    (english) http://www.livejournal.com/~pavelmachek
    (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html


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