How to compile the first LINUX module hello. C (centos5.3)

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After reading the book, I did it step by step according to the method described in the book, but failed. 555
Actually, the author of the book does not consider the details.
Create a directory
[Liu @ Liu-desktop hellomod] $ mddir hellomod
[Liu @ Liu-desktop hellomod] $ CD hellomod
[Liu @ Liu-desktop hellomod] $ VI hellomod. c

/***************** Hellomod. c *******************************/
# Include <Linux/module. h> // header files required by all modules
# Include <Linux/init. h> // init & Exit macros
Module_license ("GPL ");
Static int _ init hello_init (void)
{
Printk ("Hello China init/N ");
Return 0;
}

Static void _ exit hello_exit (void)
{
Printk ("Hello China Exit/N ");
}

Module_init (hello_init );
Module_exit (hello_exit );

/***************** Hellomod. c *******************************/

1. Download the Linux 2.6 kernel at www.kernel.org and decompress it to the/usr/src/linux26 directory.
[Root @ Liu-desktop linux26] # ls
Arch credits drivers init kernel makefile readme Security
Block crypto fs ipc lib mm reporting-bugs sound
Copying documentation include kbuild maintainers net scripts USR
----------------------------------------------
Write a MAKEFILE file:
The content is as follows:
OBJ-M: = hellomod. o
------------------------------------------------
[Liu @ Liu-desktop hellomod] $ make-C/usr/src/linux26/subdirs = $ PWD modules
Make: Entering directory '/usr/src/linux26'

Error: Kernel configuration is invalid.
Include/Linux/Autoconf. h or include/config/auto. conf are missing.
Run 'make oldconfig & make prepare' on Kernel SRC to fix it.

Warning: Symbol version dump/usr/src/linux26/module. symvers
Is missing; modules will have no dependencies and modversions.

CC [m]/home/Liu/test/hellomod. o
PC3: Error: Include/Linux/Autoconf. h: no such file or directory
In a file that contains include/Linux/posix_types.h: 47,
From include/Linux/types. h: 14,
From include/Linux/prefetch. h: 13,
From include/Linux/list. h: 8,
From include/Linux/module. h: 9,
From/home/Liu/test/hellomod. C: 1:
/Usr/lib/GCC/i486-linux-gnu/4.1.3/include/ASM/posix_types.h: 13: 22: Error: features. h: no such file or directory
/Usr/lib/GCC/i486-linux-gnu/4.1.3/include/ASM/posix_types.h: 14: 35: Error: No include path available for searching ASM/posix_types.h
...............................

Solution:

[Liu @ Liu-desktop hellomod] # Make oldconfig
[Liu @ Liu-desktop hellomod] # Make prepare

Now, try:
[Liu @ Liu-desktop hellomod] $ make-C/usr/src/linux26/subdirs = $ PWD modules
Still wrong:
Make: Entering directory '/usr/src/linux26'

Warning: Symbol version dump/usr/src/linux26/module. symvers
Is missing; modules will have no dependencies and modversions.

CC [m]/home/Liu/test/hellomod. o
Building modules, stage 2.
Modpost 1 modules
/Bin/sh: scripts/MoD/modpost: not found
Make [1]: *** [_ modpost] Error 127
Make: *** [modules] Error 2
Make: Leaving directory '/usr/src/linux26'

Did you see it? I am prompted that there is no scripts/MoD/modpost, so let's compile it.
[Root @ Liu-desktop linux26] # Make scripts
Hostcc scripts/genksyms. o
Shipped scripts/genksyms/lex. c
Shipped scripts/genksyms/parse. h
Shipped scripts/genksyms/keywords. c
Hostcc scripts/genksyms/lex. o
Shipped scripts/genksyms/parse. c
Hostcc scripts/genksyms/parse. o
Hostld scripts/genksyms
CC scripts/MoD/empty. o
Hostcc scripts/MoD/mk_elfconfig
Mkelf scripts/MoD/elfconfig. h
Hostcc scripts/MoD/file2alias. o
Hostcc scripts/MoD/modpost. o
Hostcc scripts/MoD/sumversion. o
Hostld scripts/MoD/modpost
Hostcc scripts/kallsyms
Hostcc scripts/conmakehash

OK.
[Liu @ Liu-desktop hellomod] $ make-C/usr/src/linux26/subdirs = $ PWD modules
Make: Entering directory '/usr/src/linux26'

Warning: Symbol version dump/usr/src/linux26/module. symvers
Is missing; modules will have no dependencies and modversions.

Building modules, stage 2.
Modpost 1 modules
CC/home/Liu/test/hellomod. Mod. o
LD [m]/home/Liu/test/hellomod. Ko
Make: Leaving directory '/usr/src/linux26'
[Liu @ Liu-desktop hellomod] $ ls
Hellomod. c hellomod. Ko hellomod. Mod. c hellomod. Mod. O hellomod. O makefile module. symvers

[Root @ Liu-desktop linux26] # insmod hellomod. Ko

[Root @ Liu-desktop linux26] # lsmod | grep hellomod
Lsmod | grep hellomod

[Root @ Liu-desktop linux26] # rmmod hellomod

Note: If the following error occurs, the kernel version 99% is incorrect, that is, the version magic is incorrect. <! -- @ Page {margin: 2 cm} p {margin-bottom: 0.21} -->

Insmod: Error inserting 'hellomod. Ko ':-1 invalid module format

In this case, you use sudo tail/var/log/messages
You should see a prompt similar to the following in the last line:
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Dec 19 13:42:29 localhost kernel: hellomod: Version magic '2. 6.24.2SMP mod_unload 686 4 kstacks 'should be '2. 6.27.7-134. fc10.i686SMP mod_unload 686 4 kstacks'

What should we do? The simplest way is to modify makefie in the source directory.
Set
Change the value of line 1-4 of the makefile to the same value as the current kernel.
Version = 2
Patchlevel = 6
Sublevel = 24
Extraversion =. 2
Name = err metey! A heury beelge-A ret!

How can we determine the value of your current kernel?

VI/lib/modules/'uname-R'/build/makefile
Do you know now?