Based on the existing documentation [1][2], I dare anyone to demonstrate that
we need to fine-tune these RCU parameters. The (performance) breakage potential
for doing so is immense, so let's just please put down this loaded footgun.
Disable CONFIG_RCU_EXPERT and its dependent symbols. Additionally, remove the
CONFIG_RCU_EXPERT symbol from the target kconfigs which contain it.
[1] https://www.kernel.org/doc/Documentation/RCU/Design/Data-Structures/Data-Structures.html
[2] https://lwn.net/Articles/777214/
Signed-off-by: Rui Salvaterra <rsalvaterra@gmail.com>
For the targets which enable ubifs, these symbols are already part of the
generic kconfigs. Drop them from the target kconfigs.
Signed-off-by: Rui Salvaterra <rsalvaterra@gmail.com>
Add 5.4 kernel version as a new testing kernel option.
Run-tested on Shuttle KD20, seems to work just as well as kernel 4.14.
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
Reboot the oxnas target based on Linux 4.14 by rebasing our support on
top of the now-existing upstream kernel support.
This commit brings oxnas support to the level of v4.17 having upstream
drivers for Ethernet, Serial and NAND flash.
Botch up OpenWrt's local drivers for EHCI, SATA and PCIe based on the
new platform code and device-tree.
Re-introduce base-files from old oxnas target which works for now but
needs further clean-up towards generic board support.
Functional issues:
* PCIe won't come up (hence no USB3 on Shuttle KD20)
* I2C bus of Akitio myCloud device is likely not to work (missing
debounce support in new pinctrl driver)
Code-style issues:
* plla/pllb needs further cleanup -- currently their users or writing
into the syscon regmap after acquireling the clk instead of using
defined clk_*_*() functions to setup multipliers and dividors.
* PCIe phy needs its own little driver.
* SATA driver is a monster and should be split into an mfd having
a raidctrl regmap, sata controller, sata ports and sata phy.
Tested on MitraStar STG-212 aka. Medion Akoya MD86xxx and Shuttle KD20.
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
