As outlined in my January email ("RFC: out-of-tree tty driver breakage"),
the tty/serial core uses 5 bits in the tty_port.flags field to manage
state. They are:
ASYNCB_INITIALIZED
ASYNCB_SUSPENDED
ASYNCB_NORMAL_ACTIVE
ASYNCB_CTS_FLOW
ASYNCB_CHECK_CD
(NB: ASYNC_CLOSING was recently removed)
However, updates to this field (tty_port.flags) can be and often are
non-atomic. Additionally, the field is visible to/modifiable by userspace
(the state bits above are not modifiable by userspace though).
This series moves these state bits into a different tty_port field
(iflags) and abstracts state tests and changes with trivial helpers.
The last patch of the series purposefully breaks out-of-tree driver
builds to ensure they update state test/change methods to the helpers
instead.
REQUIRES: "tty: Replace TTY_IO_ERROR bit tests with tty_io_error()"
"tty: Replace TTY_THROTTLED bit tests with tty_throttled()"
Regards,
Peter Hurley (8):
tty: Define ASYNC_ replacement bits
tty: Replace ASYNC_CTS_FLOW bit and update atomically
tty: Replace ASYNC_NORMAL_ACTIVE bit and update atomically
tty: Replace ASYNC_CHECK_CD and update atomically
tty: Replace ASYNC_SUSPENDED bit and update atomically
tty: Replace ASYNC_INITIALIZED bit and update atomically
tty: mxser: Remove unused ASYNC_SHARE_IRQ flag
tty: core: Undefine ASYNC_* flags superceded by TTY_PORT* flags
drivers/char/pcmcia/synclink_cs.c | 25 +++++-------
drivers/ipack/devices/ipoctal.c | 5 +--
drivers/isdn/i4l/isdn_tty.c | 38 ++++++++----------
drivers/s390/char/con3215.c | 22 +++++------
drivers/tty/amiserial.c | 31 +++++++--------
drivers/tty/cyclades.c | 38 ++++++++----------
drivers/tty/isicom.c | 19 ++++-----
drivers/tty/moxa.c | 10 ++---
drivers/tty/mxser.c | 28 +++++---------
drivers/tty/n_gsm.c | 8 ++--
drivers/tty/rocket.c | 13 ++++---
drivers/tty/serial/crisv10.c | 25 ++++++------
drivers/tty/serial/serial_core.c | 40 ++++++++++---------
drivers/tty/synclink.c | 65 ++++++++++++++-----------------
drivers/tty/synclink_gt.c | 35 +++++++----------
drivers/tty/synclinkmp.c | 35 +++++++----------
drivers/tty/tty_port.c | 25 ++++++------
drivers/usb/class/cdc-acm.c | 4 +-
drivers/usb/serial/console.c | 4 +-
drivers/usb/serial/generic.c | 6 +--
drivers/usb/serial/mxuport.c | 6 +--
drivers/usb/serial/sierra.c | 4 +-
drivers/usb/serial/usb-serial.c | 2 +-
drivers/usb/serial/usb_wwan.c | 4 +-
include/linux/tty.h | 77 ++++++++++++++++++++++++++++++++++++-
include/uapi/linux/tty_flags.h | 13 ++++++-
net/irda/ircomm/ircomm_tty.c | 29 +++++++-------
net/irda/ircomm/ircomm_tty_attach.c | 2 +-
net/irda/ircomm/ircomm_tty_ioctl.c | 10 ++---
29 files changed, 320 insertions(+), 303 deletions(-)
--
2.8.1
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