Target Hardware - Broadcom(MIPS core) processor Toolchain - Mips Toolchain for cross compiling Host - X86 PC Developed USB function driver(kernel module) for the above target board and then when i tried to insmod the module, I am getting the following errors. Unresolved Symbols atomic_sub atomic_sub_return atmoic_add atomic_add_return _go_disp Where I am going wrong? Welcome any solutions for the above TIA Narendra -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/