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linux/drivers
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Ivo Sieben 98001214c0 tty: Use raw spin lock to protect the TTY read section 
The "normal" spin lock that guards the N_TTY line discipline read section
is replaced by a raw spin lock.

On a PREEMP_RT system this prevents unwanted scheduling overhead when data is
read at the same time as data is being received: while RX IRQ threaded handling
is busy a TTY read call is performed from a RT priority > threaded IRQ priority.
The read call tries to take the read section spin lock (held by the threaded
IRQ) which blocks and causes a context switch to/from the threaded IRQ handler
until the spin lock is unlocked.

Signed-off-by: Ivo Sieben <meltedpianoman@gmail.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-02-04 15:05:04 -08:00
..
accessibility
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acpi
ACPI: Check MSR valid bit before using P-state frequencies
2013-01-22 13:37:21 +01:00
amba
Drivers: amba: remove __dev* attributes.
2013-01-03 15:57:02 -08:00
ata
[libata] replace sata_settings with devslp_timing
2013-01-14 13:29:15 -05:00
atm
Drivers: atm: remove __dev* attributes.
2013-01-03 15:57:04 -08:00
auxdisplay
Drivers: misc: remove __dev* attributes.
2013-01-03 15:57:16 -08:00
base
Merge remote-tracking branch 'regmap/fix/debugfs' into tmp
2013-01-24 19:04:16 +08:00
bcma
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
2013-01-08 07:31:49 -08:00
block
Merge tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux
2013-01-20 16:44:28 -08:00
bluetooth
tty: Added a CONFIG_TTY option to allow removal of TTY
2013-01-18 16:15:27 -08:00
bus
Drivers: misc: remove __dev* attributes.
2013-01-03 15:57:16 -08:00
cdrom
Drivers: misc: remove __dev* attributes.
2013-01-03 15:57:16 -08:00
char
TTY: synclink: Convert + to | for bit operations
2013-01-30 00:09:58 -05:00
clk
Merge tag 'mvebu_fixes_for_v3.8-rc5' of git://git.infradead.org/users/jcooper/linux into fixes
2013-01-23 20:30:52 -08:00
clocksource
Drivers: clocksource: remove __dev* attributes.
2013-01-03 15:57:15 -08:00
connector
Drivers: misc: remove __dev* attributes.
2013-01-03 15:57:16 -08:00
cpufreq
cpufreq: Add module aliases for acpi-cpufreq
2013-01-22 22:33:46 +01:00
cpuidle
cpuidle: remove the power_specified field in the driver
2013-01-15 14:18:04 +01:00
crypto
Drivers: crypto: remove __dev* attributes.
2013-01-03 15:57:02 -08:00
dca
…
devfreq
PM / devfreq: exynos4_bus: honor RCU lock usage
2013-01-22 13:28:40 +01:00
dio
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dma
Merge branch 'fixes' of git://git.infradead.org/users/vkoul/slave-dma
2013-01-24 10:17:49 -08:00
edac
Merge tag 'edac_fixes_for_3.8' of git://git.kernel.org/pub/scm/linux/kernel/git/bp/bp
2013-01-09 08:43:56 -08:00
eisa
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extcon
…
firewire
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
2012-12-13 12:00:02 -08:00
firmware
Drivers: misc: remove __dev* attributes.
2013-01-03 15:57:16 -08:00
gpio
gpio: mvebu: Don't free chip label memory
2013-01-17 12:27:08 +01:00
gpu
ttm: on move memory failure don't leave a node dangling
2013-01-21 13:45:23 +10:00
hid
Drivers: misc: remove __dev* attributes.
2013-01-03 15:57:16 -08:00
hsi
Drivers: misc: remove __dev* attributes.
2013-01-03 15:57:16 -08:00
hv
Drivers: hv: balloon: Fix a memory leak
2013-01-17 11:58:00 -08:00
hwmon
hwmon: (vexpress) Fix build error seen if CONFIG_OF_DEVICE is not set
2013-01-09 21:47:22 -08:00
hwspinlock
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i2c
Merge 3.8-rc5 into tty-next
2013-01-25 13:27:36 -08:00
ide
Drivers: ide: remove __dev* attributes.
2013-01-03 15:57:03 -08:00
idle
intel_idle: Don't register CPU notifier if we are not running.
2013-01-18 13:43:43 +01:00
iio
Merge tag 'staging-3.8-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging
2013-01-14 09:08:38 -08:00
infiniband
Drivers: infinband: remove __dev* attributes.
2013-01-03 15:57:15 -08:00
input
tty: Added a CONFIG_TTY option to allow removal of TTY
2013-01-18 16:15:27 -08:00
iommu
Drivers: iommu: remove __dev* attributes.
2013-01-03 15:57:14 -08:00
ipack
tty: Added a CONFIG_TTY option to allow removal of TTY
2013-01-18 16:15:27 -08:00
irqchip
Merge tag 'dt2' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
2012-12-14 14:42:53 -08:00
isdn
tty: Added a CONFIG_TTY option to allow removal of TTY
2013-01-18 16:15:27 -08:00
leds
leds: leds-gpio: set devm_gpio_request_one() flags param correctly
2013-01-02 17:58:41 -08:00
lguest
tty: Added a CONFIG_TTY option to allow removal of TTY
2013-01-18 16:15:27 -08:00
macintosh
Drivers: macintosh: remove __dev* attributes.
2013-01-03 15:57:14 -08:00
md
Merge tag 'dm-3.8-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/agk/linux-dm
2012-12-21 17:08:06 -08:00
media
Merge 3.8-rc5 into tty-next
2013-01-25 13:27:36 -08:00
memory
Drivers: memory: remove __dev* attributes.
2013-01-03 15:57:14 -08:00
memstick
…
message
Drivers: message: remove __dev* attributes.
2013-01-03 15:57:14 -08:00
mfd
mfd: vexpress-sysreg: Don't skip initialization on probe
2013-01-24 12:19:23 +00:00
misc
Merge 3.8-rc5 into tty-next
2013-01-25 13:27:36 -08:00
mmc
Merge 3.8-rc5 into tty-next
2013-01-25 13:27:36 -08:00
mtd
Drivers: mtd: remove __dev* attributes.
2013-01-03 15:57:03 -08:00
net
Merge 3.8-rc5 into tty-next
2013-01-25 13:27:36 -08:00
nfc
Drivers: misc: remove __dev* attributes.
2013-01-03 15:57:16 -08:00
nubus
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of
of: Fix export of of_find_matching_node_and_match()
2012-12-19 10:58:53 +00:00
oprofile
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parisc
Drivers: misc: remove __dev* attributes.
2013-01-03 15:57:16 -08:00
parport
serial/8250: Add suport for later SUNIX (TIMEDIA) boards.
2013-01-30 00:08:22 -05:00
pci
Merge tag '3.8-pci-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci
2013-01-22 16:36:23 -08:00
pcmcia
Merge tag 'headers' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
2012-12-12 11:45:16 -08:00
pinctrl
Merge tag 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
2013-01-08 18:53:56 -08:00
platform
asus-laptop: Fix potential invalid pointer dereference
2013-01-07 12:33:48 -05:00
pnp
PNP: Handle IORESOURCE_BITS in resource allocation
2013-01-03 13:10:53 +01:00
power
Merge tag 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
2013-01-08 18:53:56 -08:00
pps
tty: Added a CONFIG_TTY option to allow removal of TTY
2013-01-18 16:15:27 -08:00
ps3
Drivers: misc: remove __dev* attributes.
2013-01-03 15:57:16 -08:00
ptp
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next
2012-12-12 18:07:07 -08:00
pwm
Merge tag 'for-3.8-rc1' of git://gitorious.org/linux-pwm/linux-pwm
2012-12-19 08:19:07 -08:00
rapidio
Merge tag 'driver-core-3.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core
2012-12-11 13:13:55 -08:00
regulator
Merge remote-tracking branch 'regulator/fix/s5m8767' into tmp
2013-01-15 09:38:59 +09:00
remoteproc
Drivers: misc: remove __dev* attributes.
2013-01-03 15:57:16 -08:00
rpmsg
Drivers: misc: remove __dev* attributes.
2013-01-03 15:57:16 -08:00
rtc
drivers/rtc/rtc-da9055.c: fix cross-section reference
2013-01-11 14:54:54 -08:00
s390
Merge 3.8-rc5 into tty-next
2013-01-25 13:27:36 -08:00
sbus
Drivers: sbus: remove __dev* attributes.
2013-01-03 15:57:03 -08:00
scsi
Drivers: scsi: remove __dev* attributes.
2013-01-03 15:57:01 -08:00
sfi
…
sh
sh: clkfwk: bugfix: sh_clk_div_enable() care sh_clk_div_set_rate() if div6
2013-01-11 20:57:58 +09:00
sn
Drivers: misc: remove __dev* attributes.
2013-01-03 15:57:16 -08:00
spi
spi/sh-hspi: fix return value check in hspi_probe().
2012-12-19 15:11:41 +00:00
ssb
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
2013-01-08 07:31:49 -08:00
staging
Merge 3.8-rc5 into tty-next
2013-01-25 13:27:36 -08:00
target
iscsi-target: Fix CmdSN comparison (use cmd->cmd_sn instead of cmd->stat_sn)
2013-01-10 21:00:37 -08:00
tc
…
thermal
Drivers: thermal: remove __dev* attributes.
2013-01-03 15:57:02 -08:00
tty
tty: Use raw spin lock to protect the TTY read section
2013-02-04 15:05:04 -08:00
uio
Merge tag 'soc' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
2012-12-12 12:05:15 -08:00
usb
Merge 3.8-rc5 into tty-next
2013-01-25 13:27:36 -08:00
uwb
…
vfio
vfio-pci: Fix buffer overfill
2013-01-15 10:45:26 -07:00
vhost
Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending
2012-12-15 14:25:10 -08:00
video
Merge tag 'imx-fixes-3.8-3' of git://git.linaro.org/people/shawnguo/linux-2.6 into fixes
2013-01-23 20:35:02 -08:00
virt
Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc
2012-12-18 09:58:09 -08:00
virtio
Drivers: virtio: remove __dev* attributes.
2013-01-03 15:57:01 -08:00
vlynq
Drivers: vlynq: remove __dev* attributes.
2013-01-03 15:57:01 -08:00
vme
…
w1
Drivers: w1: remove last __devexit_p() instance
2013-01-03 15:57:01 -08:00
watchdog
watchdog: twl4030_wdt: add DT support
2013-01-02 12:07:05 +01:00
xen
Merge tag 'stable/for-linus-3.8-rc3-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen
2013-01-18 12:02:52 -08:00
zorro
Drivers: zorro: remove CONFIG_HOTPLUG usage
2013-01-03 15:57:01 -08:00
Kconfig
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Makefile
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