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Date: Tue, 7 Aug 2012 21:47:25 +0200 From: Jiri Slaby <jslaby@...e.cz> To: gregkh@...uxfoundation.org Cc: alan@...ux.intel.com, linux-kernel@...r.kernel.org, jirislaby@...il.com Subject: [PATCH 00/41] TTY buffer in tty_port -- prep no. 4 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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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