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c97399418a
linux/drivers/tty
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Ivo Sieben c97399418a tty: Use raw spin lock to protect TTY ldisc administration 
The global "normal" spin lock that guards the line discipline
administration is replaced by a raw spin lock. On a PREEMPT_RT system this
prevents unwanted scheduling overhead around the line discipline administration.

On a 200 MHz AT91SAM9261 processor setup this fixes about 100us of scheduling
overhead on a TTY read or write call.

Signed-off-by: Ivo Sieben <meltedpianoman@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-10-24 11:37:02 -07:00
..
hvc TTY: hvcs: fix missing unlock on error in hvcs_initialize() 2012-10-24 11:37:02 -07:00
ipwireless Merge branch 'for-3.7' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq 2012-10-02 09:54:49 -07:00
serial x86: ce4100: allow second UART usage 2012-10-24 11:34:51 -07:00
vt TTY: vt, fix paste_selection ldisc handling 2012-10-22 16:50:53 -07:00
amiserial.c serial: add a new helper function 2012-09-05 13:28:35 -07:00
bfin_jtag_comm.c TTY: use tty_port_link_device 2012-08-13 16:50:19 -07:00
cyclades.c serial: add a new helper function 2012-09-05 13:28:35 -07:00
ehv_bytechan.c TTY: use tty_port_register_device 2012-08-13 16:50:19 -07:00
isicom.c serial: add a new helper function 2012-09-05 13:28:35 -07:00
Kconfig tty/serial: put (EXPERIMENTAL) marking back on N_GSM and SERIAL_IFX6X60 2012-09-18 17:17:56 +01:00
Makefile
moxa.c TTY: tty_alloc_driver() returns error pointers 2012-08-16 12:07:23 -07:00
moxa.h
mxser.c serial: add a new helper function 2012-09-05 13:28:35 -07:00
mxser.h
n_gsm.c tty: n_gsm: Fix incorrect debug display 2012-09-17 04:45:30 -07:00
n_hdlc.c
n_r3964.c tty: localise the lock 2012-08-10 12:55:47 -07:00
n_tracerouter.c
n_tracesink.c
n_tracesink.h
n_tty.c TTY: move tty buffers to tty_port 2012-10-22 16:58:28 -07:00
nozomi.c TTY: use tty_port_register_device 2012-08-13 16:50:19 -07:00
pty.c TTY: move tty buffers to tty_port 2012-10-22 16:58:28 -07:00
rocket_int.h
rocket.c TTY: use tty_port_register_device 2012-08-13 16:50:19 -07:00
rocket.h
synclink_gt.c serial: add a new helper function 2012-09-05 13:28:35 -07:00
synclink.c serial: add a new helper function 2012-09-05 13:28:35 -07:00
synclinkmp.c serial: add a new helper function 2012-09-05 13:28:35 -07:00
sysrq.c sparc64: Add global PMU register dumping via sysrq. 2012-10-16 09:34:01 -07:00
tty_audit.c TTY: audit, stop accessing tty->icount 2012-10-22 16:50:54 -07:00
tty_buffer.c TTY: Report warning when low_latency flag is wrongly used 2012-10-24 11:21:32 -07:00
tty_io.c TTY: move tty buffers to tty_port 2012-10-22 16:58:28 -07:00
tty_ioctl.c
tty_ldisc.c tty: Use raw spin lock to protect TTY ldisc administration 2012-10-24 11:37:02 -07:00
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: move tty buffers to tty_port 2012-10-22 16:58:28 -07:00