From mboxrd@z Thu Jan  1 00:00:00 1970
From: krinkin.m.u@gmail.com (Mike Krinkin)
Date: Mon, 25 Jul 2016 21:16:53 +0300
Subject: help please first module
In-Reply-To: <d70f32f4-0751-241b-98f6-2ac8a1da3a2e@gmail.com>
References: <d70f32f4-0751-241b-98f6-2ac8a1da3a2e@gmail.com>
Message-ID: <20160725181651.GA12152@gmail.com>
To: kernelnewbies@lists.kernelnewbies.org
List-Id: kernelnewbies.lists.kernelnewbies.org

On Mon, Jul 25, 2016 at 08:04:41PM +0200, hinawa wrote:
> hello i am starting to write modules and this code does not compile
> 
> hello.c:
> 
> /********************
> 
>   Modulo experimental
> 
> ********************/*

Probably, error is in the line above.

> 
> #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
> 
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