hello i am starting to write modules and this code does not compile hello.c: /******************** Modulo experimental ********************/* #include <linux/init.h> #include <linux/module.h> #include <linux/kernel.h> MODULE_LICENSE("GPL"); MODULE_AUTHOR("Alberto Cerezo <ac90869@gmail.com>"); MODULE_DESCRIPTION("\"Hola Mundo\" Modulo experimental"); MODULE_VERSION("printk"); static int __init hola_init(void) { printk(KERN_INFO "Hola mundo\n"); return 0; } static void __exit hola_exit(void) { printk(KERN_INFO "Adios, me marcho\n"); } module_init(hola_init); module_exit(hola_exit); Makefile: obj-m += hello.o all: make -C /lib/modules/$(shell uname -r)/build M=${PWD} modules clean: make -C /lib/modules/$(shell uname -r)/build M=${PWD} clean error: In file included from /usr/src/linux-headers-4.6.0-1-common/include/linux/init.h:4:0, from /home/hinawa/Documentos/programasC/modulos/mod1/hello.c:9: /usr/src/linux-headers-4.6.0-1-common/include/linux/compiler.h:89:1: error: expected identifier or ‘(’ before ‘struct’ struct ftrace_branch_data { ^ make[4]: *** [/home/hinawa/Documentos/programasC/modulos/mod1/hello.o] Error 1 make[3]: *** [_module_/home/hinawa/Documentos/programasC/modulos/mod1] Error 2 make[2]: *** [sub-make] Error 2 make[1]: *** [all] Error 2 make: *** [all] Error 2 I do not get to find the error because the code appears to be correct ... thks