I tried your patch but with the latest build of 17.01.4 I get the same error message as in:
#23

If you only want shortcut-fe, you could use the patch in my repos under folder patch...
For 17.01: https://github.com/juppin/openwrt_custom_builds_17.01
For trunk (kernel 4.9): https://github.com/juppin/openwrt_custom_builds_trunk

Use the shortcut-fe patch:

cd openwrt-src
patch -p1 < ../666_shortcut-fe-X.patch
make menuconfig (select shortcut-fe and fast-classifier)
make defconfig
make download && make -j4

Ok thank you, what I am trying to accomplish is the latest 17.01 build (trunk) with the following packages:

• LuCI
• Mini UPnP
• SQM
• Shortcut-FE

I will test your patch.

I got a question about your patch, is it compatible with sqm?

Did you try gwlim's patch and test if there is a difference in throughput?

What I was reading in the thread in the LEDE forum is that gwlim's patch is also doing some mips optimization but the patch is not compatible with sqm.

Without sqm the throughput is almost the same over lan as with gwlim´s patchset.
SQM should work with shortcut-fe as it only bypass some network hooks related with iptables and not the full linux network stack. Therefore packages pass qdisc...

The patch file from my repo is only a copy of dissents not accepted pull request on lede-project...

I think shortcut-fe from gwlim and from dissent are almost the same...