A four day bug
I just finished finding a four day bug. It sounds simple in retrospect, but oh the wrong paths I have trod and wild codes I have explored.
If, like me, you run Debian on tiny routers, like WRTSL54GS or other
Broadcom units from Linksys, you probably use an OpenWRT kernel and a
Debian root. Somewhere between 2.6.25 and 2.6.28 the OpenWRT people
chopped the FPU emulator out of their Linux tree. Sadly for Debian
people this causes any program you try to run, like init, to hang in
an infinite loop.
The solution is now enshrined over at https://dev.openwrt.org/ticket/5774 where it talks about the invisible kernel config option: MIPS_FPU_EMU.
Addendum: Oh yeah, you are going to want to go into
drivers/usb/host/ehci-ssb.c and pull the static off
of ssb_ehci_attach and ssb_ehci_detach if you want USB 2.0 built
into the kernel.