Undo stupid commit made 3 months ago :
"Fix redefinition of macro comedi_rt_task_context_t".
It wasn't being redefined, it was being defined for RTLinux.
From: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Frank Mori Hess <fmhess@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>