Ivo Sieben bd5d7ce9af tty: Only wakeup the line discipline idle queue when queue is active ...

Before waking up the tty line discipline idle queue first check if the queue is
active (non empty). This prevents unnecessary entering the critical section in
the wake_up() function and therefore avoid needless scheduling overhead on a
PREEMPT_RT system caused by two processes being in the same critical section.

Signed-off-by: Ivo Sieben <meltedpianoman@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2013-01-15 23:02:22 -08:00

..

hvc

TTY: hvsi: use for_each_compatible_node() macro

2013-01-15 23:00:43 -08:00

ipwireless

TTY: switch tty_flip_buffer_push

2013-01-15 22:30:15 -08:00

serial

drivers/tty/serial: extern function which for release resource, need check pointer, before free it

2013-01-15 23:00:44 -08:00

vt

TTY: switch tty_schedule_flip

2013-01-15 22:43:15 -08:00

amiserial.c

TTY: switch tty_flip_buffer_push

2013-01-15 22:30:15 -08:00

bfin_jtag_comm.c

TTY: switch tty_flip_buffer_push

2013-01-15 22:30:15 -08:00

cyclades.c

cyclades: push down tty_port_tty_get

2013-01-15 22:43:15 -08:00

ehv_bytechan.c

TTY: switch tty_flip_buffer_push

2013-01-15 22:30:15 -08:00

isicom.c

TTY: switch tty_flip_buffer_push

2013-01-15 22:30:15 -08:00

Kconfig

Merge branch 'for-upstream' of http://github.com/agraf/linux-2.6 into queue

2012-10-10 19:03:54 -03:00

Makefile

tty/powerpc: introduce the ePAPR embedded hypervisor byte channel driver

2011-08-23 10:32:56 -07:00

moxa.c

TTY: switch tty_schedule_flip

2013-01-15 22:43:15 -08:00

moxa.h

tty: move a number of tty drivers from drivers/char/ to drivers/tty/

2011-02-22 16:14:56 -08:00

mxser.c

TTY: switch tty_flip_buffer_push

2013-01-15 22:30:15 -08:00

mxser.h

Fix common misspellings

2011-03-31 11:26:23 -03:00

n_gsm.c

Revert "n_gsm.c: add tx_lock in gsm_send"

2013-01-15 22:48:15 -08:00

n_hdlc.c

Remove all #inclusions of asm/system.h

2012-03-28 18:30:03 +01:00

n_r3964.c

tty: localise the lock

2012-08-10 12:55:47 -07:00

n_tracerouter.c

n_tracerouter and n_tracesink ldisc additions.

2011-05-13 16:31:00 -07:00

n_tracesink.c

n_tracerouter and n_tracesink ldisc additions.

2011-05-13 16:31:00 -07:00

n_tracesink.h

n_tracerouter and n_tracesink ldisc additions.

2011-05-13 16:31:00 -07:00

n_tty.c

tty: add missing newlines to WARN_RATELIMIT

2012-10-25 11:30:27 -07:00

nozomi.c

TTY: nozomi, remove dead code

2013-01-15 22:43:16 -08:00

pty.c

TTY: do not reset master's packet mode

2013-01-15 22:49:36 -08:00

rocket_int.h

tty: move a number of tty drivers from drivers/char/ to drivers/tty/

2011-02-22 16:14:56 -08:00

rocket.c

tty: add parenthesis to macro POLL_PERIOD in rocket.c

2013-01-15 22:49:36 -08:00

rocket.h

tty: move a number of tty drivers from drivers/char/ to drivers/tty/

2011-02-22 16:14:56 -08:00

synclink_gt.c

TTY: synclink, remove unneeded tests

2013-01-15 22:43:15 -08:00

synclink.c

TTY: switch tty_flip_buffer_push

2013-01-15 22:30:15 -08:00

synclinkmp.c

TTY: synclink, remove unneeded tests

2013-01-15 22:43:15 -08:00

sysrq.c

mm, oom: ensure sysrq+f always passes valid zonelist

2012-11-15 17:13:48 -08:00

tty_audit.c

TTY: audit, stop accessing tty->icount

2012-10-22 16:50:54 -07:00

tty_buffer.c

TTY: switch tty_schedule_flip

2013-01-15 22:43:15 -08:00

tty_io.c

tty: Fix comments that reference BKL, eventd, old paths

2013-01-15 21:57:44 -08:00

tty_ioctl.c

tty: pty - Move TIOCPKT handling into pty.c

2012-10-25 12:07:18 -07:00

tty_ldisc.c

tty: Only wakeup the line discipline idle queue when queue is active

2013-01-15 23:02:22 -08:00

tty_mutex.c

tty: tty_mutex.c: Fixed coding style warning (using printk)

2012-10-24 11:34:51 -07:00

tty_port.c

TTY: introduce tty_port_destroy

2012-11-15 17:20:58 -08:00