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Subject[PATCH 00/41] TTY buffer in tty_port -- prep no. 4
Date
Hi,

this is the fourth, and hopefully the last, series of patches which
allow tty buffers to be moved from tty_struct (present from open to
close/hangup) to tty_port (present as long as the device). This will
allow us to get rid of the tty refcounting in the interrupt service
routines and other hot paths after we are done. This is because we
will not need to handle races among ISRs, timers, hangups and others,
because tty_port lives as long as an interrupt/timer tick may occur.
Unlike tty_struct.

In this series, the fourth batch of drivers is converted to use
tty_port. Last time I promised that all drivers have a tty_port. It
was not really true. Now it should be. Here we also continued
assigning tty_port to tty_struct->port. And we should be done with
that here too. I.e. for all in-kernel drivers we have tty->port set
after driver->ops->install returns. So the TTY layer now finally has
an access to a tty_port in all of the drivers.

Now we can start moving tty buffers to tty_port and get rid of all the
refcounting as was mentioned above.

As usual, standard x86 stuff was runtime-tested. The rest is only
checked to be compilation-errors free.

Jiri Slaby (41):
TTY: pty, stop passing NULL to free_tty_struct
TTY: 68328serial, fix compilation
TTY: n_gsm, use tty_port_install
misc: pti, add const to pci_device_id table
misc: pti, pci drvdata cannot be NULL in ->remove
misc: pti, stop using iomap's unmap on ioremap space
misc: pti, move ->remove to the PCI code
misc: pti, do the opposite of ->probe in ->remove
misc: pti, fix fail paths
misc: pti, fix tty_port count
misc: pti, use tty_port_register_device
mxser: allow overlapping vector
TTY: ttyprintk, unregister tty driver on failure
TTY: ttyprintk, don't touch behind tty->write_buf
TTY: ttyprintk, initialize tty_port earlier
TTY: tty3270, free tty driver properly
TTY: pass flags to alloc_tty_driver
TTY: pty, switch to tty_alloc_driver
TTY: move allocations to tty_alloc_driver
TTY: add support for unnumbered device nodes
TTY: move cdev_add to tty_register_device
TTY: use tty_port_register_device
TTY: automatically create nodes for some drivers
TTY: tty_port, add some documentation
TTY: add tty_port_link_device
TTY: use tty_port_link_device
TTY: synclink_cs, sanitize fail paths
TTY: synclink_cs, use dynamic tty devices
TTY: synclink_cs, final cleanup in synclink_cs_init
TTY: moxa, convert to dynamic device
TTY: nfcon, add tty_port and link it
TTY: con3215, unset raw3215[line]
TTY: con3215, add tty install
TTY: i4l, add tty install
TTY: synclink, add tty install
TTY: synclinkmp, add tty install
TTY: ircomm_tty, add tty install
TTY: tty3270, add tty install
TTY: hvc_console, add tty install
TTY: hvcs, clean hvcs_open a bit
TTY: hvcs, add tty install

arch/alpha/kernel/srmcons.c | 1 +
arch/ia64/hp/sim/simserial.c | 1 +
arch/m68k/emu/nfcon.c | 4 +
arch/parisc/kernel/pdc_cons.c | 1 +
arch/um/drivers/line.c | 3 +-
arch/xtensa/platforms/iss/console.c | 1 +
drivers/char/pcmcia/synclink_cs.c | 105 ++++++++++-----------
drivers/char/ttyprintk.c | 29 +++---
drivers/isdn/capi/capi.c | 3 +-
drivers/isdn/gigaset/interface.c | 3 +-
drivers/isdn/i4l/isdn_tty.c | 25 +++--
drivers/misc/pti.c | 128 ++++++++++++-------------
drivers/mmc/card/sdio_uart.c | 4 +-
drivers/net/usb/hso.c | 7 +-
drivers/s390/char/con3215.c | 28 ++++--
drivers/s390/char/sclp_tty.c | 1 +
drivers/s390/char/sclp_vt220.c | 1 +
drivers/s390/char/tty3270.c | 34 +++++--
drivers/staging/ipack/devices/ipoctal.c | 2 +-
drivers/tty/amiserial.c | 9 +-
drivers/tty/bfin_jtag_comm.c | 1 +
drivers/tty/cyclades.c | 16 ++--
drivers/tty/ehv_bytechan.c | 9 +-
drivers/tty/hvc/hvc_console.c | 31 +++++--
drivers/tty/hvc/hvcs.c | 82 +++++++++-------
drivers/tty/hvc/hvsi.c | 2 +
drivers/tty/ipwireless/tty.c | 2 +-
drivers/tty/isicom.c | 3 +-
drivers/tty/moxa.c | 24 ++++-
drivers/tty/mxser.c | 41 ++++++--
drivers/tty/n_gsm.c | 30 ++++--
drivers/tty/nozomi.c | 4 +-
drivers/tty/pty.c | 36 +++++---
drivers/tty/rocket.c | 4 +-
drivers/tty/serial/68328serial.c | 23 +++--
drivers/tty/serial/crisv10.c | 11 ++-
drivers/tty/serial/ifx6x60.c | 4 +-
drivers/tty/serial/msm_smd_tty.c | 8 +-
drivers/tty/serial/serial_core.c | 3 +-
drivers/tty/synclink.c | 44 +++++----
drivers/tty/synclink_gt.c | 7 +-
drivers/tty/synclinkmp.c | 28 ++++--
drivers/tty/tty_io.c | 154 ++++++++++++++++++++-----------
drivers/tty/tty_port.c | 43 ++++++++-
drivers/usb/class/cdc-acm.c | 3 +-
drivers/usb/gadget/u_serial.c | 3 +-
include/linux/tty.h | 2 +
include/linux/tty_driver.h | 35 ++++++-
net/bluetooth/rfcomm/tty.c | 4 +-
net/irda/ircomm/ircomm_tty.c | 41 ++++----
50 files changed, 692 insertions(+), 396 deletions(-)

--
1.7.10.4




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