This patch was sent to OpenWrt via GitHub pull requests into the 21.02
version and in Turris Build it was included in commit
252a2443 ("patches/openwrt: 5.15:
Backport Linux modules: newer version")

This patch was only for Linux kernel 5.4, but we are using Linux kernel
5.10, so we can safely drop this.

Fixes: 44fe7446 ("patches/openwrt: Linux
kernel 5.15: refresh all patches")

Michal Hrusecky authored 2 years ago and Josef Schlehofer committed 2 years ago

We need FIT image support for netboot, but it is also in general quite a
handy feature.

And as well add missing Kernel option

This backports all relevant changes for Linux kernel 5.10 from OpenWrt
master branch and refreshes patches

this can cause fetch to fail on some systems because the build system
can not detect the checksum type with this trailing space

Josef Schlehofer authored 2 years ago and Michal Vasilek committed 2 years ago

Packages related to old ISDN4Linux was dropped in Linux kernel since
version 5.3, but they were still present in OpenWrt. [1] In recent
commits, where it was updated our Linux 5.15 support the commit from
OpenWrt master branch is included, thus we need to let users know about
this breaking change, because it does not make sense to postpone it or
even have it in distribution anymore.

[1] https://github.com/openwrt/openwrt/commit/db55dea5fc047190af188f07018e99b0c7a4bdde

This is connected to
https://gitlab.nic.cz/turris/os/build/-/raw/b70855d09775ef2c83eb60f8e120097da753d903/patches/openwrt/to-upstream/0102-gcc-ppc-expect-sf-ld-suffix-even-with-spe-enabled.patch
("patches/openwrt: gcc 8.4.0: mpc85xx SPE: expect '-sf' `ld` suffix even
with SPE enabled")

This was allowed because in OpenWrt 21.02 branch, there is now included
this commit [1].

[1]
https://github.com/openwrt/openwrt/commit/cbce6c6d9519ab86e11c9752910a4c72dd52cb58
("kernel: split kernel version to dedicated files")

This enables MLGRU for Linux 5.15

Difference in power consumption between ondemand and performance
governors is negligible (at least on our boards) while ondemand has
noticeable lag when starting transmissions. Performance was also default
governor in previously shipped kernel, so let's stick to it.