linux-kernel - Re: [PATCH 2/4] TTY: serial, remove dead code from 68328

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Message-ID: <CAMuHMdXQCXj_y+JzP-opYq+EioR6mp1bPF903GWOAtEjYqr4Dw@mail.gmail.com>
Date:	Wed, 31 Aug 2011 21:51:52 +0200
From:	Geert Uytterhoeven <geert@...ux-m68k.org>
To:	Jiri Slaby <jslaby@...e.cz>
Cc:	gregkh@...e.de, linux-serial@...r.kernel.org,
	linux-kernel@...r.kernel.org, jirislaby@...il.com,
	Alan Cox <alan@...ux.intel.com>,
	linux-m68k@...ts.linux-m68k.org,
	uClinux development list <uclinux-dev@...inux.org>
Subject: Re: [PATCH 2/4] TTY: serial, remove dead code from 68328

On Wed, Aug 31, 2011 at 21:51, Geert Uytterhoeven <geert@...ux-m68k.org> wrote:
> On Wed, Aug 31, 2011 at 21:24, Jiri Slaby <jslaby@...e.cz> wrote:
>> The code is dead at least since 2002. So remove it to not distort git
>> grep output (about port.tty usage).
>>
>> Remove the whole do_softirq tasklet as it's noop now.
>>
>> Signed-off-by: Jiri Slaby <jslaby@...e.cz>
>> Cc: Geert Uytterhoeven <geert@...ux-m68k.org>
>> Cc: Alan Cox <alan@...ux.intel.com>
>> ---
>> Cc: linux-m68k@...ts.linux-m68k.org
>
> This is a uClinux driver.

So I really wanted to cc the uClinux list...

>>  drivers/tty/serial/68328serial.c |   35 -----------------------------------
>>  drivers/tty/serial/68328serial.h |    1 -
>>  2 files changed, 0 insertions(+), 36 deletions(-)
>>
>> diff --git a/drivers/tty/serial/68328serial.c b/drivers/tty/serial/68328serial.c
>> index e0a7754..f549231 100644
>> --- a/drivers/tty/serial/68328serial.c
>> +++ b/drivers/tty/serial/68328serial.c
>> @@ -235,22 +235,6 @@ static void batten_down_hatches(void)
>>
>>  static void status_handle(struct m68k_serial *info, unsigned short status)
>>  {
>> -#if 0
>> -       if(status & DCD) {
>> -               if((info->port.tty->termios->c_cflag & CRTSCTS) &&
>> -                  ((info->curregs[3] & AUTO_ENAB)==0)) {
>> -                       info->curregs[3] |= AUTO_ENAB;
>> -                       info->pendregs[3] |= AUTO_ENAB;
>> -                       write_zsreg(info->m68k_channel, 3, info->curregs[3]);
>> -               }
>> -       } else {
>> -               if((info->curregs[3] & AUTO_ENAB)) {
>> -                       info->curregs[3] &= ~AUTO_ENAB;
>> -                       info->pendregs[3] &= ~AUTO_ENAB;
>> -                       write_zsreg(info->m68k_channel, 3, info->curregs[3]);
>> -               }
>> -       }
>> -#endif
>>        /* If this is console input and this is a
>>         * 'break asserted' status change interrupt
>>         * see if we can drop into the debugger
>> @@ -340,9 +324,6 @@ static void transmit_chars(struct m68k_serial *info)
>>        info->xmit_tail = info->xmit_tail & (SERIAL_XMIT_SIZE-1);
>>        info->xmit_cnt--;
>>
>> -       if (info->xmit_cnt < WAKEUP_CHARS)
>> -               schedule_work(&info->tqueue);
>> -
>>        if(info->xmit_cnt <= 0) {
>>                /* All done for now... TX ints off */
>>                uart->ustcnt &= ~USTCNT_TX_INTR_MASK;
>> @@ -378,21 +359,6 @@ irqreturn_t rs_interrupt(int irq, void *dev_id)
>>        return IRQ_HANDLED;
>>  }
>>
>> -static void do_softint(struct work_struct *work)
>> -{
>> -       struct m68k_serial      *info = container_of(work, struct m68k_serial, tqueue);
>> -       struct tty_struct       *tty;
>> -
>> -       tty = info->tty;
>> -       if (!tty)
>> -               return;
>> -#if 0
>> -       if (clear_bit(RS_EVENT_WRITE_WAKEUP, &info->event)) {
>> -               tty_wakeup(tty);
>> -       }
>> -#endif
>> -}
>> -
>>  static int startup(struct m68k_serial * info)
>>  {
>>        m68328_uart *uart = &uart_addr[info->line];
>> @@ -1324,7 +1290,6 @@ rs68328_init(void)
>>            info->event = 0;
>>            info->count = 0;
>>            info->blocked_open = 0;
>> -           INIT_WORK(&info->tqueue, do_softint);
>>            init_waitqueue_head(&info->open_wait);
>>            init_waitqueue_head(&info->close_wait);
>>            info->line = i;
>> diff --git a/drivers/tty/serial/68328serial.h b/drivers/tty/serial/68328serial.h
>> index 8c9c3c0..3d2faab 100644
>> --- a/drivers/tty/serial/68328serial.h
>> +++ b/drivers/tty/serial/68328serial.h
>> @@ -158,7 +158,6 @@ struct m68k_serial {
>>        int                     xmit_head;
>>        int                     xmit_tail;
>>        int                     xmit_cnt;
>> -       struct work_struct      tqueue;
>>        wait_queue_head_t       open_wait;
>>        wait_queue_head_t       close_wait;
>>  };
>> --
>> 1.7.6.1

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds
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