/usr/src/linux-headers-4.10.0-26/drivers/pinctrl/ is in linux-headers-4.10.0-26 4.10.0-26.30~16.04.1.
This file is owned by root:root, with mode 0o755.
..
/usr/src/linux-headers-4.10.0-26/drivers/pinctrl/Kconfig
/usr/src/linux-headers-4.10.0-26/drivers/pinctrl/Makefile
/usr/src/linux-headers-4.10.0-26/drivers/pinctrl/aspeed/
/usr/src/linux-headers-4.10.0-26/drivers/pinctrl/aspeed/Kconfig
/usr/src/linux-headers-4.10.0-26/drivers/pinctrl/aspeed/Makefile
/usr/src/linux-headers-4.10.0-26/drivers/pinctrl/bcm/
/usr/src/linux-headers-4.10.0-26/drivers/pinctrl/bcm/Kconfig
/usr/src/linux-headers-4.10.0-26/drivers/pinctrl/bcm/Makefile
/usr/src/linux-headers-4.10.0-26/drivers/pinctrl/berlin/
/usr/src/linux-headers-4.10.0-26/drivers/pinctrl/berlin/Kconfig
/usr/src/linux-headers-4.10.0-26/drivers/pinctrl/berlin/Makefile
/usr/src/linux-headers-4.10.0-26/drivers/pinctrl/freescale/
/usr/src/linux-headers-4.10.0-26/drivers/pinctrl/freescale/Kconfig
/usr/src/linux-headers-4.10.0-26/drivers/pinctrl/freescale/Makefile
/usr/src/linux-headers-4.10.0-26/drivers/pinctrl/intel/
/usr/src/linux-headers-4.10.0-26/drivers/pinctrl/intel/Kconfig
/usr/src/linux-headers-4.10.0-26/drivers/pinctrl/intel/Makefile
/usr/src/linux-headers-4.10.0-26/drivers/pinctrl/mediatek/
/usr/src/linux-headers-4.10.0-26/drivers/pinctrl/mediatek/Kconfig
/usr/src/linux-headers-4.10.0-26/drivers/pinctrl/mediatek/Makefile
/usr/src/linux-headers-4.10.0-26/drivers/pinctrl/meson/
/usr/src/linux-headers-4.10.0-26/drivers/pinctrl/meson/Makefile
/usr/src/linux-headers-4.10.0-26/drivers/pinctrl/mvebu/
/usr/src/linux-headers-4.10.0-26/drivers/pinctrl/mvebu/Kconfig
/usr/src/linux-headers-4.10.0-26/drivers/pinctrl/mvebu/Makefile
/usr/src/linux-headers-4.10.0-26/drivers/pinctrl/nomadik/
/usr/src/linux-headers-4.10.0-26/drivers/pinctrl/nomadik/Kconfig
/usr/src/linux-headers-4.10.0-26/drivers/pinctrl/nomadik/Makefile
/usr/src/linux-headers-4.10.0-26/drivers/pinctrl/pxa/
/usr/src/linux-headers-4.10.0-26/drivers/pinctrl/pxa/Kconfig
/usr/src/linux-headers-4.10.0-26/drivers/pinctrl/pxa/Makefile
/usr/src/linux-headers-4.10.0-26/drivers/pinctrl/qcom/
/usr/src/linux-headers-4.10.0-26/drivers/pinctrl/qcom/Kconfig
/usr/src/linux-headers-4.10.0-26/drivers/pinctrl/qcom/Makefile
/usr/src/linux-headers-4.10.0-26/drivers/pinctrl/samsung/
/usr/src/linux-headers-4.10.0-26/drivers/pinctrl/samsung/Kconfig
/usr/src/linux-headers-4.10.0-26/drivers/pinctrl/samsung/Makefile
/usr/src/linux-headers-4.10.0-26/drivers/pinctrl/sh-pfc/
/usr/src/linux-headers-4.10.0-26/drivers/pinctrl/sh-pfc/Kconfig
/usr/src/linux-headers-4.10.0-26/drivers/pinctrl/sh-pfc/Makefile
/usr/src/linux-headers-4.10.0-26/drivers/pinctrl/sirf/
/usr/src/linux-headers-4.10.0-26/drivers/pinctrl/sirf/Makefile
/usr/src/linux-headers-4.10.0-26/drivers/pinctrl/spear/
/usr/src/linux-headers-4.10.0-26/drivers/pinctrl/spear/Kconfig
/usr/src/linux-headers-4.10.0-26/drivers/pinctrl/spear/Makefile
/usr/src/linux-headers-4.10.0-26/drivers/pinctrl/stm32/
/usr/src/linux-headers-4.10.0-26/drivers/pinctrl/stm32/Kconfig
/usr/src/linux-headers-4.10.0-26/drivers/pinctrl/stm32/Makefile
/usr/src/linux-headers-4.10.0-26/drivers/pinctrl/sunxi/
/usr/src/linux-headers-4.10.0-26/drivers/pinctrl/sunxi/Kconfig
/usr/src/linux-headers-4.10.0-26/drivers/pinctrl/sunxi/Makefile
/usr/src/linux-headers-4.10.0-26/drivers/pinctrl/tegra/
/usr/src/linux-headers-4.10.0-26/drivers/pinctrl/tegra/Kconfig
/usr/src/linux-headers-4.10.0-26/drivers/pinctrl/tegra/Makefile
/usr/src/linux-headers-4.10.0-26/drivers/pinctrl/uniphier/
/usr/src/linux-headers-4.10.0-26/drivers/pinctrl/uniphier/Kconfig
/usr/src/linux-headers-4.10.0-26/drivers/pinctrl/uniphier/Makefile
/usr/src/linux-headers-4.10.0-26/drivers/pinctrl/vt8500/
/usr/src/linux-headers-4.10.0-26/drivers/pinctrl/vt8500/Kconfig
/usr/src/linux-headers-4.10.0-26/drivers/pinctrl/vt8500/Makefile