devices/rtdmnet.c : abuse RTDM api to allow sendmsg and recvmsg to be called indirectly from userland cobalt process ioctl, while rtdm_socket is created from a kernel thread.
#!/bin/bash
set -x
KERNELDIR=/data/kernel/linux-3.16.6
PREVER=3.14
KERNELVER=3.16
for f in $KERNELDIR/drivers/net/ethernet/intel/e1000e/*.[ch]; do
echo $f
b=$(basename $f)
o=${b/\./-$KERNELVER-orig.}
e=${b/\./-$KERNELVER-ethercat.}
cp -v $f $o
chmod 644 $o
cp -v $o $e
op=${b/\./-$PREVER-orig.}
ep=${b/\./-$PREVER-ethercat.}
diff -u $op $ep | patch -p1 $e
sed -i s/$PREVER-ethercat.h/$KERNELVER-ethercat.h/ $e
hg add $o $e
done