1. 18 Jan, 2013 3 commits
    • Joe Millenbach's avatar
      tty: Added a CONFIG_TTY option to allow removal of TTY · 4f73bc4d
      Joe Millenbach authored
      The option allows you to remove TTY and compile without errors. This
      saves space on systems that won't support TTY interfaces anyway.
      bloat-o-meter output is below.
      
      The bulk of this patch consists of Kconfig changes adding "depends on
      TTY" to various serial devices and similar drivers that require the TTY
      layer.  Ideally, these dependencies would occur on a common intermediate
      symbol such as SERIO, but most drivers "select SERIO" rather than
      "depends on SERIO", and "select" does not respect dependencies.
      
      bloat-o-meter output comparing our previous minimal to new minimal by
      removing TTY.  The list is filtered to not show removed entries with awk
      '$3 != "-"' as the list was very long.
      
      add/remove: 0/226 grow/shrink: 2/14 up/down: 6/-35356 (-35350)
      function                                     old     new   delta
      chr_dev_init                                 166     170      +4
      allow_signal                                  80      82      +2
      static.__warned                              143     142      -1
      disallow_signal                               63      62      -1
      __set_special_pids                            95      94      -1
      unregister_console                           126     121      -5
      start_kernel                                 546     541      -5
      register_console                             593     588      -5
      copy_from_user                                45      40      -5
      sys_setsid                                   128     120      -8
      sys_vhangup                                   32      19     -13
      do_exit                                     1543    1526     -17
      bitmap_zero                                   60      40     -20
      arch_local_irq_save                          137     117     -20
      release_task                                 674     652     -22
      static.spin_unlock_irqrestore                308     260     -48
      Signed-off-by: default avatarJoe Millenbach <jmillenbach@gmail.com>
      Reviewed-by: default avatarJamey Sharp <jamey@minilop.net>
      Reviewed-by: default avatarJosh Triplett <josh@joshtriplett.org>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      4f73bc4d
    • Ilya Zykov's avatar
      tty: Add driver unthrottle in ioctl(...,TCFLSH,..). · a1bf9584
      Ilya Zykov authored
      Regression 'tty: fix "IRQ45: nobody cared"'
      Regression commit 7b292b4b
      
        Function reset_buffer_flags() also invoked during the ioctl(...,TCFLSH,..).
      At the time of request we can have full buffers and throttled driver too.
      If we don't unthrottle driver, we can get forever throttled driver, because,
      after request, we will have empty buffers and throttled driver and
      there is no place to unthrottle driver.
      It simple reproduce with "pty" pair then one side sleep on tty->write_wait,
      and other side do ioctl(...,TCFLSH,..). Then there is no place to do writers wake up.
      Signed-off-by: default avatarIlya Zykov <ilya@ilyx.ru>
      Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      a1bf9584
    • Thierry Reding's avatar
      serial: lpc32xx: Fix fallout from tty_port conversion · 33aeb9da
      Thierry Reding authored
      A duplicate definition of the port variable was introduced in the
      interrupt handler, which causes the build to break. The fix is to
      rename the variable to tport, which is already properly used in
      subsequent code.
      Signed-off-by: default avatarThierry Reding <thierry.reding@avionic-design.de>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      33aeb9da
  2. 17 Jan, 2013 15 commits
  3. 16 Jan, 2013 21 commits
  4. 15 Jan, 2013 1 commit