cat /proc/kallsyms shows below output. Wat is the second column represents. I could see- D, d, t, T, r etc on the second coumn. 0000000000004000 D per_cpu__gdt_page 0000000000005000 d per_cpu__exception_stacks 000000000000b000 d per_cpu__idt_desc 000000000000b010 d per_cpu__xen_cr0_value 000000000000b018 D per_cpu__xen_vcpu 000000000000b020 D per_cpu__xen_vcpu_info 000000000000b060 d per_cpu__mc_buffer ffffffff81866397 t init_trace_printk ffffffff8186eb4b T printk_all_partitions ffffffff818bdbd8 t __setup_str_setup_early_printk ffffffff818f0c00 t __setup_setup_early_printk ffffffff818f1800 t __initcall_init_trace_printkearly ffffffff818f1bd8 t __initcall_init_trace_printk_function_export5 ffffffff81992fc0 b printk_buf ffffffffa01955a0 r __ksymtab_v4l_printk_ioctl [videodev] -- To unsubscribe from this list: send the line "unsubscribe linux-newbie" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.linux-learn.org/faqs