are you sure you are directed to RT PREEMPT KERNEL SOURCE ? On Wed, 2012-06-27 at 17:53 +0200, [email protected] wrote: > Hello, > > I'm trying to use the IgH EtherCAT Master on Ubuntu 12.04. I'm using > the 3.2.0 kernel with RT-Preempt patches from this PPA: > https://launchpad.net/~abogani/+archive/realtime. During compilation > of the kernel modules, I get the following warnings: > > Building modules, stage 2. > MODPOST 3 modules > WARNING: > "ecrt_slave_config_state" > [/home/hamelinp/devroot/ethercat-1.5.1-rt/examples/mini/ec_mini.ko] undefined! > WARNING: > "ecrt_slave_config_pdos" > [/home/hamelinp/devroot/ethercat-1.5.1-rt/examples/mini/ec_mini.ko] undefined! > WARNING: > "_raw_read_lock" > [/home/hamelinp/devroot/ethercat-1.5.1-rt/devices/ec_generic.ko] undefined! > WARNING: > "_raw_read_unlock" > [/home/hamelinp/devroot/ethercat-1.5.1-rt/devices/ec_generic.ko] undefined! > > CC /home/hamelinp/devroot/ethercat-1.5.1-rt/devices/ec_generic.mod.o > LD > [M] /home/hamelinp/devroot/ethercat-1.5.1-rt/devices/ec_generic.ko > > CC /home/hamelinp/devroot/ethercat-1.5.1-rt/examples/mini/ec_mini.mod.o > LD > [M] /home/hamelinp/devroot/ethercat-1.5.1-rt/examples/mini/ec_mini.ko > > CC /home/hamelinp/devroot/ethercat-1.5.1-rt/master/ec_master.mod.o > LD [M] /home/hamelinp/devroot/ethercat-1.5.1-rt/master/ec_master.ko > > > Indeed, when trying to load the module I get this error: > > FATAL: Error inserting ec_generic > (/lib/modules/3.2.0-23-realtime-pae/ethercat/devices/ec_generic.ko): > Unknown symbol in module, or unknown parameter (see dmesg) > > and in dmesg: > > [ 2487.244002] EtherCAT: Master driver 1.5.1 0f7a243b03e4 > [ 2487.244013] EtherCAT: 0 masters waiting for devices. > [ 2487.244114] ec_generic: Unknown symbol _raw_read_unlock (err 0) > [ 2487.244122] ec_generic: Unknown symbol _raw_read_lock (err 0) > > Using this command: > > cat /proc/kallsyms | grep raw_read_unlock > > I can confirm that these symbols are not available. However, I have a > 'rt_read_unlock' available in the symbols table. > > Any hint? > > Thank you, > > ------------------------------------ > Philippe Hamelin, ing., M. Ing > Chercheur / Researcher > > T: 450-652-8499 x2198 > F: 450-652-1316 > > Expertise robotique et civil > Institut de recherche d'Hydro-Québec (IREQ) > 1740, boul. Lionel-Boulet > Varennes (QC) J3X 1S1, Canada > >
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