AuxXxilium/linux_dsm_epyc7002
1
0
Fork 0
mirror of https://github.com/AuxXxilium/linux_dsm_epyc7002.git synced 2024-12-16 02:26:57 +07:00
Code Issues Actions Packages Projects Releases Wiki Activity
1efba35afa
linux_dsm_epyc7002/drivers/gpio
History
Christophe Leroy 1efba35afa gpio: sysfs: avoid using kstrtol() in 'value' attribute write 
A 'perf record' on an app continuously writing in the 'value'
attribute show that most of the time is spent in kstrtol()

--17.99%--value_store
          |
          |--10.17%--kstrtoint
          |          |
          |          |--8.82%--kstrtoll
          |
          |--2.50%--gpiod_set_value_cansleep
          |
          |--1.82%--u16_gpio_set
          |
          |--1.46%--value_store

The normal case is to write 0 or 1 in the attribute, therefore
this patch avoids the call to kstrtol() in the most common cases

Then 'perf record' shows

--7.21%--value_store
          |
          |--2.69%--u16_gpio_set
          |
          |--1.47%--value_store
          |
          |--1.08%--gpiod_set_value_cansleep
          |
          |--0.60%--mutex_lock
          |
           --0.58%--mutex_unlock

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-12-20 10:34:58 +01:00
..
devres.c gpio: devres: Improve kerneldoc 2017-08-14 15:01:13 +02:00
gpio-74x164.c gpio: 74x164: Introduce 'enable-gpios' property 2017-08-14 16:24:02 +02:00
gpio-74xx-mmio.c gpio: 74xx-mmio: Use devm_gpiochip_add_data() for gpio registration 2016-02-23 20:19:42 +05:30
gpio-104-dio-48e.c gpio: Move irqdomain into struct gpio_irq_chip 2017-11-08 14:06:21 +01:00
gpio-104-idi-48.c gpio: Move irqdomain into struct gpio_irq_chip 2017-11-08 14:06:21 +01:00
gpio-104-idio-16.c gpio: Move irqdomain into struct gpio_irq_chip 2017-11-08 14:06:21 +01:00
gpio-adnp.c gpio: Move irqdomain into struct gpio_irq_chip 2017-11-08 14:06:21 +01:00
gpio-adp5520.c gpio: adp5520: Use devm_gpiochip_add_data() for gpio registration 2016-02-23 20:34:06 +05:30
gpio-adp5588.c gpio: adp5588: move header file out of I2C realm 2017-05-29 13:36:45 +02:00
gpio-altera-a10sr.c gpio: altera-a10sr: constify gpio_chip structure 2017-08-14 15:01:12 +02:00
gpio-altera.c gpio: Move irqdomain into struct gpio_irq_chip 2017-11-08 14:06:21 +01:00
gpio-amd8111.c gpio: amd8111: Use devm_request_region 2016-02-16 00:19:52 +01:00
gpio-amdpt.c gpio: amdpt: Add a new ACPI HID 2016-03-30 10:38:51 +02:00
gpio-arizona.c gpio: arizona: Add support for GPIOs that need to be maintained 2017-05-29 11:09:01 +02:00
gpio-aspeed.c gpio: aspeed: Add support for reset tolerance 2017-12-02 22:42:34 +01:00
gpio-ath79.c gpio: ath79: add missing MODULE_DESCRIPTION/LICENSE 2017-12-02 22:42:22 +01:00
gpio-bcm-kona.c gpio: bcm-kona: make use of raw_spinlock variants 2017-03-16 21:52:07 +01:00
gpio-bd9571mwv.c gpio: Add ROHM BD9571MWV-M PMIC GPIO driver 2017-04-28 09:47:46 +02:00
gpio-brcmstb.c gpio: brcmstb: implement suspend/resume/shutdown 2017-10-31 10:51:40 +01:00
gpio-bt8xx.c gpio: bt8xx: use gpiochip data pointer 2016-01-05 11:21:03 +01:00
gpio-clps711x.c gpio: clps711x: Remove board support 2016-06-08 10:49:58 +02:00
gpio-crystalcove.c gpio: Move irqdomain into struct gpio_irq_chip 2017-11-08 14:06:21 +01:00
gpio-cs5535.c gpio: cs5535: Use devm_gpiochip_add_data() for gpio registration 2016-02-23 20:35:28 +05:30
gpio-da9052.c gpio: constify gpio_chip structures 2016-09-13 10:35:56 +02:00
gpio-da9055.c gpio: constify gpio_chip structures 2016-09-13 10:35:56 +02:00
gpio-davinci.c gpio: davinci: Handle the return value of davinci_gpio_irq_setup function 2017-08-14 15:03:39 +02:00
gpio-dln2.c gpio: Move irqdomain into struct gpio_irq_chip 2017-11-08 14:06:21 +01:00
gpio-dwapb.c gpio: dwapb: fix bgpio usage 2017-10-25 11:25:10 +02:00
gpio-em.c pinctrl/gpio: Unify namespace for cross-calls 2017-09-22 11:02:10 +02:00
gpio-ep93xx.c pinctrl / gpio: Introduce .set_config() callback for GPIO chips 2017-01-26 15:27:37 +01:00
gpio-etraxfs.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
gpio-exar.c gpio: exar: Use correct property prefix and document bindings 2017-08-01 13:43:55 +02:00
gpio-f7188x.c gpio: f7188x: Add a missing break 2017-04-28 10:09:16 +02:00
gpio-ftgpio010.c gpio: ftgpio010: Fix platform_get_irq's error checking 2017-12-02 22:42:35 +01:00
gpio-ge.c gpio: Convert to using %pOF instead of full_name 2017-08-14 15:01:12 +02:00
gpio-gpio-mm.c Annotate hardware config module parameters in drivers/gpio/ 2017-04-20 12:02:32 +01:00
gpio-grgpio.c gpio: grgpio: Do not use gc->pin2mask() 2017-10-25 11:25:38 +02:00
gpio-htc-egpio.c gpio: htc-egpio: read output value from cache 2016-11-13 11:50:22 +01:00
gpio-ich.c gpio: ich: Use devm_request_region 2016-02-16 00:19:53 +01:00
gpio-ingenic.c gpio: Move irqdomain into struct gpio_irq_chip 2017-11-08 14:06:21 +01:00
gpio-intel-mid.c gpio: Move irqdomain into struct gpio_irq_chip 2017-11-08 14:06:21 +01:00
gpio-iop.c gpio: iop: add missing MODULE_DESCRIPTION/AUTHOR/LICENSE 2017-12-02 22:42:21 +01:00
gpio-it87.c gpio: it87: fix mojibake in module metadata 2017-12-02 22:42:32 +01:00
gpio-janz-ttl.c gpio: janz-ttl: Use devm_gpiochip_add_data() for gpio registration 2016-02-23 20:35:33 +05:30
gpio-kempld.c gpio: kempld: Use devm_gpiochip_add_data() for gpio registration 2016-02-23 20:35:34 +05:30
gpio-ks8695.c gpio: ks8695: remove irq_to_gpio function 2016-02-19 00:20:30 +01:00
gpio-loongson1.c gpio: loongson1: fix bgpio usage 2017-10-25 11:25:38 +02:00
gpio-loongson.c gpio: convert remaining users to gpiochip_add_data() 2016-01-05 11:21:20 +01:00
gpio-lp873x.c pinctrl / gpio: Introduce .set_config() callback for GPIO chips 2017-01-26 15:27:37 +01:00
gpio-lp3943.c Revert "gpio: lp3943: Drop pin_used and lp3943_gpio_request/lp3943_gpio_free" 2016-03-09 22:00:27 +07:00
gpio-lp87565.c gpio: lp87565: Set proper output level and direction for direction_output 2017-07-31 15:26:57 +02:00
gpio-lpc18xx.c gpio: constify gpio_chip structures 2016-09-13 10:35:56 +02:00
gpio-lpc32xx.c gpio: lpc32xx: remove unused platform data file 2016-09-12 14:23:37 +02:00
gpio-lynxpoint.c gpio: Move irqdomain into struct gpio_irq_chip 2017-11-08 14:06:21 +01:00
gpio-max730x.c gpio: max730x: set gpiochip data pointer before using it 2016-08-10 15:40:44 +02:00
gpio-max732x.c gpio: max732x: Remove duplicate NULL check 2017-11-29 13:25:23 +01:00
gpio-max3191x.c gpio: Add driver for Maxim MAX3191x industrial serializer 2017-10-19 22:40:07 +02:00
gpio-max7300.c gpio: Drop owner assignment from i2c_driver 2015-11-30 09:31:00 +01:00
gpio-max7301.c spi: Drop owner assignment from spi_drivers 2015-10-28 10:30:17 +09:00
gpio-max77620.c gpio: max77620: Make regmap_irq_chip const 2017-08-14 16:06:24 +02:00
gpio-mb86s7x.c gpio: mb86s70: Revert "Return error if requesting an already assigned gpio" 2017-10-31 13:13:34 +01:00
gpio-mc9s08dz60.c gpio: mc9s08dz60: make explicitly non-modular 2016-03-31 15:02:09 +02:00
gpio-mc33880.c gpio: mc33880: use gpiochip data pointer 2016-01-05 11:21:07 +01:00
gpio-menz127.c pinctrl / gpio: Introduce .set_config() callback for GPIO chips 2017-01-26 15:27:37 +01:00
gpio-merrifield.c gpio: Move irqdomain into struct gpio_irq_chip 2017-11-08 14:06:21 +01:00
gpio-ml-ioh.c gpio: ml-ioh: use devres for irq generic chip 2017-08-21 00:06:35 +02:00
gpio-mm-lantiq.c gpio: update my email address 2016-12-30 09:18:10 +01:00
gpio-mmio.c gpio-mmio: Use the new .get_multiple() callback 2017-10-30 08:35:32 +01:00
gpio-mockup.c gpio: mockup: fix a return value check 2017-12-08 15:34:15 +01:00
gpio-mpc8xxx.c gpio: mpc8xxx: Do not reverse bits using bgpio 2017-10-25 11:25:40 +02:00
gpio-mpc5200.c gpio: Include linux/gpio.h instead of asm/gpio.h 2016-02-16 00:20:03 +01:00
gpio-msic.c gpio: msic: fix error return code in platform_msic_gpio_probe() 2017-08-14 15:03:38 +02:00
gpio-mvebu.c gpio: mvebu: Fix cause computation in irq handler 2017-08-14 15:00:43 +02:00
gpio-mxc.c gpio: mxc: use devres for irq generic chip 2017-08-21 00:09:33 +02:00
gpio-mxs.c gpio: mxs: use devres for irq generic chip 2017-08-21 00:10:00 +02:00
gpio-octeon.c gpio: octeon: Constify octeon_gpio_match table 2016-03-30 10:38:51 +02:00
gpio-omap.c gpio: omap: initialize gpioirq chip as part of gpiochip_add_data 2017-11-30 10:54:16 +01:00
gpio-palmas.c gpio: palmas: fix implicit assumption module.h is present 2016-09-15 13:57:43 +02:00
gpio-pca953x.c gpio: Move irqdomain into struct gpio_irq_chip 2017-11-08 14:06:21 +01:00
gpio-pcf857x.c gpio: Move irqdomain into struct gpio_irq_chip 2017-11-08 14:06:21 +01:00
gpio-pch.c gpio: pch: use devres for irq generic chip 2017-08-21 00:08:52 +02:00
gpio-pci-idio-16.c gpio: Move irqdomain into struct gpio_irq_chip 2017-11-08 14:06:21 +01:00
gpio-pisosr.c gpio: constify gpio_chip structures 2016-09-13 10:35:56 +02:00
gpio-pl061.c gpio: Move irqdomain into struct gpio_irq_chip 2017-11-08 14:06:21 +01:00
gpio-pxa.c gpio: pxa: Use library functions 2017-10-07 00:01:08 +02:00
gpio-rc5t583.c gpio: rc5t583: make explicitly non-modular 2016-04-05 17:02:35 +02:00
gpio-rcar.c Merge branch 'gpio-irqchip-rework' of /home/linus/linux-gpio into devel 2017-11-09 09:38:42 +01:00
gpio-rdc321x.c gpio: remove redundant owner assignments of drivers 2016-06-07 09:35:16 +02:00
gpio-reg.c gpio: Move irqdomain into struct gpio_irq_chip 2017-11-08 14:06:21 +01:00
gpio-sa1100.c gpio: sa1100: implement get_direction method 2017-03-24 14:04:37 +01:00
gpio-sch311x.c gpio: remove redundant owner assignments of drivers 2016-06-07 09:35:16 +02:00
gpio-sch.c gpio: constify gpio_chip structures 2016-09-13 10:35:56 +02:00
gpio-sodaville.c gpio: sodaville: use resource management for irqs 2017-03-15 11:16:36 +01:00
gpio-spear-spics.c gpio: spear-spics: drop unused MODULE_ tags from non-modular code 2016-08-23 11:23:41 +02:00
gpio-sta2x11.c gpio: sta2x11: use devres for irq generic chip 2017-08-21 00:06:04 +02:00
gpio-stmpe.c gpio: gpio-stmpe: make various char arrays static const, shrinks object size 2017-12-02 22:42:33 +01:00
gpio-stp-xway.c gpio: update my email address 2016-12-30 09:18:10 +01:00
gpio-syscon.c gpio: syscon: Change the compatibility string 2016-06-08 10:48:17 +02:00
gpio-tb10x.c gpio: tb10x: Handle return value of devm_kasprintf 2017-09-21 14:14:17 +02:00
gpio-tc3589x.c gpio: Move irqdomain into struct gpio_irq_chip 2017-11-08 14:06:21 +01:00
gpio-tegra186.c gpio: tegra186: Remove tegra186_gpio_lock_class 2017-11-13 11:43:10 +01:00
gpio-tegra.c pinctrl/gpio: Unify namespace for cross-calls 2017-09-22 11:02:10 +02:00
gpio-thunderx.c gpio: thunderx: remove unused .map() hook from irq_domain_ops 2017-09-22 15:31:55 +02:00
gpio-timberdale.c gpio: timberdale: make it explicitly non-modular 2016-05-11 13:49:11 +02:00
gpio-tpic2810.c gpio: constify gpio_chip structures 2016-09-13 10:35:56 +02:00
gpio-tps6586x.c gpio: remove redundant owner assignments of drivers 2016-06-07 09:35:16 +02:00
gpio-tps65086.c gpio: constify gpio_chip structures 2016-09-13 10:35:56 +02:00
gpio-tps65218.c pinctrl / gpio: Introduce .set_config() callback for GPIO chips 2017-01-26 15:27:37 +01:00
gpio-tps65910.c gpio: remove redundant owner assignments of drivers 2016-06-07 09:35:16 +02:00
gpio-tps65912.c gpio: constify gpio_chip structures 2016-09-13 10:35:56 +02:00
gpio-tps68470.c gpio: Add support for TPS68470 GPIOs 2017-08-14 15:37:38 +02:00
gpio-ts4800.c gpio: ts4800: Fix module autoload 2016-10-21 14:55:07 +02:00
gpio-ts4900.c gpio: constify gpio_chip structures 2016-09-13 10:35:56 +02:00
gpio-ts5500.c gpio: ts5500: Use devm_gpiochip_add_data() for gpio registration 2016-02-23 20:35:49 +05:30
gpio-twl4030.c mfd: twl: Move header file out of I2C realm 2017-09-04 14:41:02 +01:00
gpio-twl6040.c gpio: twl6040: remove unneeded forward declaration 2017-08-23 10:20:16 +02:00
gpio-tz1090-pdc.c gpio: tz1090-pdc: use gpiochip data pointer 2016-01-05 11:21:16 +01:00
gpio-tz1090.c pinctrl/gpio: Unify namespace for cross-calls 2017-09-22 11:02:10 +02:00
gpio-ucb1400.c gpio: ucb1400: Use devm_gpiochip_add_data() for gpio registration 2016-02-23 20:35:50 +05:30
gpio-uniphier.c This is the bulk of GPIO changes for the v4.15 kernel cycle: 2017-11-14 17:23:44 -08:00
gpio-vf610.c gpio: Move irqdomain into struct gpio_irq_chip 2017-11-08 14:06:21 +01:00
gpio-viperboard.c gpio: remove redundant owner assignments of drivers 2016-06-07 09:35:16 +02:00
gpio-vr41xx.c gpio: convert remaining users to gpiochip_add_data() 2016-01-05 11:21:20 +01:00
gpio-vx855.c pinctrl / gpio: Introduce .set_config() callback for GPIO chips 2017-01-26 15:27:37 +01:00
gpio-wcove.c gpio: Move irqdomain into struct gpio_irq_chip 2017-11-08 14:06:21 +01:00
gpio-wm831x.c gpio: wm831x: Add basic device tree support 2017-03-23 11:45:55 +00:00
gpio-wm8350.c gpio: constify gpio_chip structures 2016-09-13 10:35:56 +02:00
gpio-wm8994.c pinctrl / gpio: Introduce .set_config() callback for GPIO chips 2017-01-26 15:27:37 +01:00
gpio-ws16c48.c gpio: Move irqdomain into struct gpio_irq_chip 2017-11-08 14:06:21 +01:00
gpio-xgene-sb.c This is the bulk of GPIO changes for the v4.15 kernel cycle: 2017-11-14 17:23:44 -08:00
gpio-xgene.c gpio: xgene: mark PM functions as __maybe_unused 2017-03-06 14:35:22 +01:00
gpio-xilinx.c gpio: Convert to using %pOF instead of full_name 2017-08-14 15:01:12 +02:00
gpio-xlp.c gpio: Move irqdomain into struct gpio_irq_chip 2017-11-08 14:06:21 +01:00
gpio-xra1403.c gpio: xra1403: Add EXAR XRA1403 SPI GPIO expander driver 2017-05-22 17:48:41 +02:00
gpio-xtensa.c gpio: convert remaining users to gpiochip_add_data() 2016-01-05 11:21:20 +01:00
gpio-zevio.c gpio: zevio: make gpio_chip const 2017-08-23 09:21:54 +02:00
gpio-zx.c gpio: Move irqdomain into struct gpio_irq_chip 2017-11-08 14:06:21 +01:00
gpio-zynq.c gpio: Move irqdomain into struct gpio_irq_chip 2017-11-08 14:06:21 +01:00
gpiolib-acpi.c gpiolib: acpi: Introduce NO_RESTRICTION quirk 2017-11-30 10:53:52 +01:00
gpiolib-devprop.c gpio: gpiolib-devprop: Check chip->parent pointer before dereferencing 2016-10-25 20:23:19 +02:00
gpiolib-legacy.c Revert "gpiolib: Split GPIO flags parsing and GPIO configuration" 2016-07-04 16:51:29 +02:00
gpiolib-of.c gpio: gpiolib: Generalise state persistence beyond sleep 2017-12-02 22:42:34 +01:00
gpiolib-sysfs.c gpio: sysfs: avoid using kstrtol() in 'value' attribute write 2017-12-20 10:34:58 +01:00
gpiolib.c gpiolib: use kstrdup_const() for gpio_device label 2017-12-20 09:16:39 +01:00
gpiolib.h gpiolib: constify label in gpio_device 2017-12-20 09:01:50 +01:00
Kconfig pinctrl: move gpio-axp209 to pinctrl 2017-12-07 10:05:30 +01:00
Makefile pinctrl: move gpio-axp209 to pinctrl 2017-12-07 10:05:30 +01:00