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7391ee1695
linux/drivers/tty
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Peter Hurley 7391ee1695 tty: Simplify flip buffer list with 0-sized sentinel 
Use a 0-sized sentinel to avoid assigning the head ptr from
the driver side thread. This also eliminates testing head/tail
for NULL.

When the sentinel is first 'consumed' by the buffer work
(or by tty_buffer_flush()), it is detached from the list but not
freed nor added to the free list. Both buffer work and
tty_buffer_flush() continue to preserve at least 1 flip buffer
to which head & tail is pointed.

Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-07-23 16:47:08 -07:00
..
hvc tty: replace strict_strtoul() with kstrtoul() 2013-06-03 10:30:42 -07:00
ipwireless tty: ipwireless: Remove redundant NULL check before kfree 2013-03-15 13:58:32 -07:00
serial Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2013-07-13 14:52:21 -07:00
vt tty: Convert termios_mutex to termios_rwsem 2013-07-23 16:43:01 -07:00
amiserial.c TTY: amiserial, use module_platform_driver_probe() 2013-03-15 13:55:23 -07:00
bfin_jtag_comm.c
cyclades.c TTY: add tty_port_tty_hangup helper 2013-03-18 16:24:29 -07:00
ehv_bytechan.c TTY: ehv_bytechan: add missing platform_driver_unregister() when module exit 2013-05-20 12:15:59 -07:00
goldfish.c
isicom.c
Kconfig
Makefile tty: Add timed, writer-prioritized rw semaphore 2013-05-20 12:30:32 -07:00
metag_da.c tty: metag_da: avoid getting tty kref in dashtty_timer() 2013-02-06 11:10:17 -08:00
moxa.c TTY: add tty_port_tty_hangup helper 2013-03-18 16:24:29 -07:00
moxa.h
mxser.c tty: mxser: Fix build warning introduced by dfc7b837c7 (Re: linux-next: build warning after merge of the tty.current tree) 2013-05-22 10:26:02 -07:00
mxser.h
n_gsm.c TTY: fix DTR not being dropped on hang up 2013-03-18 16:27:53 -07:00
n_hdlc.c
n_r3964.c
n_tracerouter.c
n_tracesink.c
n_tracesink.h
n_tty.c n_tty: Queue buffer work on any available cpu 2013-07-23 16:43:03 -07:00
nozomi.c TTY: add tty_port_tty_hangup helper 2013-03-18 16:24:29 -07:00
pty.c tty: Convert termios_mutex to termios_rwsem 2013-07-23 16:43:01 -07:00
rocket_int.h
rocket.c TTY: rocket, fix more no-PCI warnings 2013-05-20 12:15:59 -07:00
rocket.h
synclink_gt.c TTY: synclink_gt: fix DTR being raised on hang up 2013-04-12 14:08:17 -07:00
synclink.c TTY: synclink: fix DTR being raised on hang up 2013-04-12 14:08:17 -07:00
synclinkmp.c TTY: synclinkmp: fix DTR being raised on hang up 2013-04-12 14:08:18 -07:00
sysrq.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2013-07-04 15:35:08 -07:00
tty_audit.c audit: do not needlessly take a lock in tty_audit_exit 2013-04-30 15:31:28 -04:00
tty_buffer.c tty: Simplify flip buffer list with 0-sized sentinel 2013-07-23 16:47:08 -07:00
tty_io.c tty: Only guarantee termios read safety for throttle/unthrottle 2013-07-23 16:43:02 -07:00
tty_ioctl.c tty: Only guarantee termios read safety for throttle/unthrottle 2013-07-23 16:43:02 -07:00
tty_ldisc.c tty: Convert termios_mutex to termios_rwsem 2013-07-23 16:43:01 -07:00
tty_ldsem.c tty: Add timed, writer-prioritized rw semaphore 2013-05-20 12:30:32 -07:00
tty_mutex.c
tty_port.c tty: Complete ownership transfer of flip buffers 2013-03-18 16:44:02 -07:00