Peter Hurley 2c5dc4641c n_tty: Eliminate receive_room() from consumer/exclusive paths ... The input worker never reschedules itself; it only processes input until either there is no more input or the read buffer is full. So the reader is responsible for restarting the input worker only if the read buffer was previously full (no_room == 1) _and_ space is now available to process more input because the reader has consumed data from the read buffer. However, computing the actual space available is not required to determine if the reader has consumed data from the read buffer. This condition is evaluated in 5 situations, each of which the space avail is already known: 1. n_tty_flush_buffer() - the read buffer is empty; kick the worker 2. n_tty_set_termios() - no data has been consumed; do not kick the worker (although it may have kicked the reader so data _will be_ consumed) 3. n_tty_check_unthrottle - avail space > 3968; kick the worker 4. n_tty_read, before leaving - only kick the worker if the reader has moved the tail. This prevents unnecessarily kicking the worker when timeout-style reading is used. 5. n_tty_read, before sleeping - although it is possible for the read buffer to be full and input_available_p() to be false, this can only happen when the input worker is racing the reader, in which case the reader will have been woken and won't sleep. Rename n_tty_set_room() to n_tty_kick_worker() to reflect what the function actually does. Signed-off-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2015-02-02 10:11:26 -08:00
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accessibility	…
acpi	Merge branch 'for-rc' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux	2015-01-14 07:53:51 +13:00
amba	Char/Misc driver patches for 3.19-rc1	2014-12-14 16:43:47 -08:00
android	…
ata	More ACPI and power management updates for 3.19-rc1	2014-12-18 20:28:33 -08:00
atm	Driver core patches for 3.19-rc1	2014-12-14 16:10:09 -08:00
auxdisplay	…
base	Merge branches 'pm-domains', 'powercap' and 'pm-tools'	2014-12-29 21:24:00 +01:00
bcma	Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus	2014-12-11 17:56:37 -08:00
block	NVMe: Fix locking on abort handling	2015-01-08 09:02:23 -07:00
bluetooth	Merge branch 'for-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next	2014-12-15 13:23:09 -05:00
bus	drivers: bus: check cci device tree node status	2015-01-16 19:10:41 -08:00
cdrom	…
char	ipmi: Fix compile warning with tv_usec	2014-12-30 13:34:36 -06:00
clk	clk: fix possible null pointer dereference	2015-01-17 11:33:57 -08:00
clocksource	Fixes for 3.19	2014-12-30 15:27:20 +01:00
connector	…
coresight	…
cpufreq	Merge branches 'pm-cpufreq' and 'pm-cpuidle'	2014-12-29 21:23:41 +01:00
cpuidle	Merge branches 'pm-cpufreq' and 'pm-cpuidle'	2014-12-29 21:23:41 +01:00
crypto	Driver core patches for 3.19-rc1	2014-12-14 16:10:09 -08:00
dca	…
devfreq	…
dio	…
dma	dmaengine: dw: balance PM runtime calls	2015-01-13 23:07:58 +05:30
dma-buf	…
edac	Driver core patches for 3.19-rc1	2014-12-14 16:10:09 -08:00
eisa	…
extcon	Char/Misc driver patches for 3.19-rc1	2014-12-14 16:43:47 -08:00
firewire	firewire: sbp2: replace card lock by target lock	2014-12-10 20:53:21 +01:00
firmware	Driver core patches for 3.19-rc1	2014-12-14 16:10:09 -08:00
fmc	…
gpio	gpio: dln2: use bus_sync_unlock instead of scheduling work	2015-01-09 07:57:35 +01:00
gpu	Merge tag 'amdkfd-fixes-2015-01-06' of git://people.freedesktop.org/~gabbayo/linux into drm-fixes	2015-01-08 10:36:37 +10:00
hid	HID: roccat: potential out of bounds in pyra_sysfs_write_settings()	2015-01-09 14:41:01 +01:00
hsi	* misc. fixes in omap-ssi and nokia-modem drivers	2014-12-15 17:33:47 -08:00
hv	Char/Misc driver patches for 3.19-rc1	2014-12-14 16:43:47 -08:00
hwmon	Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux	2014-12-17 10:16:27 -08:00
hwspinlock	…
i2c	Merge branch 'i2c/for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux	2014-12-20 13:52:52 -08:00
ide	Driver core patches for 3.19-rc1	2014-12-14 16:10:09 -08:00
idle	…
iio	First round of IIO fixes for the 3.19 cycle.	2015-01-08 17:59:04 -08:00
infiniband	SCSI for-linus on 20141220	2014-12-20 13:42:57 -08:00
input	Revert "Input: atmel_mxt_ts - use deep sleep mode when stopped"	2014-12-31 12:59:34 -08:00
iommu	iommu/rockchip: Drop owner assignment from platform_drivers	2015-01-05 12:40:06 +01:00
ipack	…
irqchip	Merge branch 'irq-irqdomain-arm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2014-12-15 17:30:09 -08:00
isdn	isdn: fix NUL (\0 or \x00) specification in string	2015-01-12 15:31:35 -05:00
leds	leds: netxbig: fix oops at probe time	2015-01-13 13:49:01 -08:00
lguest	virtio: allow finalize_features to fail	2014-12-09 16:32:32 +02:00
macintosh	macintosh: therm_pm72: delete deprecated driver	2014-12-19 19:32:47 +01:00
mailbox	Driver core patches for 3.19-rc1	2014-12-14 16:10:09 -08:00
mcb	mcb: mcb-pci: Only remap the 1st 0x200 bytes of BAR 0	2015-01-09 15:46:37 -08:00
md	dm: fix missed error code if .end_io isn't implemented by target_type	2014-12-17 12:31:13 -05:00
media	More ACPI and power management updates for 3.19-rc1	2014-12-18 20:28:33 -08:00
memory	MTD updates for 3.19:	2014-12-17 09:59:26 -08:00
memstick	…
message	…
mfd	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input	2014-12-30 16:59:59 -08:00
misc	Char/Misc driver fixes for 3.19-rc5	2015-01-17 08:18:08 +13:00
mmc	mmc: sdhci: Set SDHCI_POWER_ON with external vmmc	2015-01-14 09:47:19 +01:00
mtd	MTD updates for 3.19:	2014-12-17 09:59:26 -08:00
net	tg3: Release tp->lock before invoking synchronize_irq()	2015-01-14 17:05:51 -05:00
nfc	More ACPI and power management updates for 3.19-rc1	2014-12-18 20:28:33 -08:00
ntb	…
nubus	…
of	ARM: SoC/iommu configuration for 3.19	2014-12-16 14:53:01 -08:00
oprofile	…
parisc	…
parport	Char/Misc driver patches for 3.19-rc1	2014-12-14 16:43:47 -08:00
pci	Merge branch 'x86-apic-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2014-12-19 14:02:02 -08:00
pcmcia	Char/Misc driver patches for 3.19-rc1	2014-12-14 16:43:47 -08:00
phy	phy: phy-ti-pipe3: fix inconsistent enumeration of PCIe gen2 cards	2014-12-23 15:44:32 +05:30
pinctrl	pinctrl: st: Add irq_disable hook to st_gpio_irqchip	2015-01-07 10:44:39 +01:00
platform	platform-drivers-x86 for 3.19	2014-12-18 20:24:55 -08:00
pnp	PNP: Allow console to override ACPI device sleep	2015-02-02 10:11:25 -08:00
power	More ACPI and power management updates for 3.19-rc1	2014-12-18 20:28:33 -08:00
powercap	powercap / RAPL: add IDs for future Xeon CPUs	2014-12-17 02:35:42 +01:00
pps	…
ps3	…
ptp	…
pwm	pwm: Changes for v3.19-rc1	2014-12-17 10:10:51 -08:00
rapidio	…
ras	…
regulator	regulator: Fix for v3.19	2014-12-29 13:24:38 -08:00
remoteproc	Driver core patches for 3.19-rc1	2014-12-14 16:10:09 -08:00
reset	reset: sunxi: fix spinlock initialization	2015-01-16 19:11:31 -08:00
rpmsg	…
rtc	Driver core patches for 3.19-rc1	2014-12-14 16:10:09 -08:00
s390	s390/zcrypt: kernel oops at insmod of the z90crypt device driver	2014-12-18 09:55:55 +01:00
sbus	…
scsi	scsi: ->queue_rq can't sleep	2015-01-09 15:43:01 +01:00
sfi	…
sh	drivers: sh / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM	2014-12-05 03:08:24 +01:00
sn	…
soc	Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux	2014-12-15 15:52:01 -08:00
spi	Merge remote-tracking branches 'spi/fix/img-spfi' and 'spi/fix/msiof' into spi-linus	2014-12-24 12:57:54 +00:00
spmi	…
ssb	Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus	2014-12-11 17:56:37 -08:00
staging	staging: vt6655: fix sparse warning: argument type	2015-01-12 19:49:47 -08:00
target	iscsi-target: Fix typos in enum cmd_flags_table	2015-01-09 15:25:58 -08:00
tc	…
thermal	Merge branch 'thermal-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux	2015-01-15 19:20:26 +13:00
thunderbolt	…
tty	n_tty: Eliminate receive_room() from consumer/exclusive paths	2015-02-02 10:11:26 -08:00
uio	Char/Misc driver patches for 3.19-rc1	2014-12-14 16:43:47 -08:00
usb	usb: fixes for v3.19-rc6	2015-01-14 16:27:23 -08:00
uwb	…
vfio	vfio-pci: Fix the check on pci device type in vfio_pci_probe()	2015-01-07 10:29:11 -07:00
vhost	Merge git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending	2015-01-13 15:23:26 +13:00
video	fbdev/broadsheetfb: fix memory leak	2015-01-13 15:13:45 +02:00
virt	…
virtio	virtio_pci: document why we defer kfree	2015-01-06 16:35:36 +02:00
vlynq	…
vme	…
w1	Char/Misc driver patches for 3.19-rc1	2014-12-14 16:43:47 -08:00
watchdog	watchdog: imx2_wdt: Fix the argument of watchdog_active()	2014-12-18 16:01:20 +01:00
xen	Merge remote-tracking branch 'scsi-queue/drivers-for-3.19' into for-linus	2014-12-18 05:56:29 -08:00
zorro	…
Kconfig	Staging patches for 3.19-rc1	2014-12-15 18:06:13 -08:00
Makefile	drivers: Move iommu/ before gpu/ in Makefile	2014-12-22 11:47:37 +02:00