Ubuntu driver development environment

Ubuntu driver development environment-general Linux technology-Linux programming and kernel information. The following is a detailed description. The version I used is ubuntu8.04, and the kernel tree has been created.
The/usr/src directory has the following version directories:
Linux-headers-2.6.24-19
Linux-headers-2.6.24-19-generic, if not, need to go online to download.

// Hello. c
# Include
# Include
# Include

MODULE_LICENSE ("GPL ");
Static int init_routine (void)
{
Printk ("module init \ n ");
Return 0;
}
Void cleanup_routine (void)
{
Printk ("Cleanup module \ n ");
}
Module_init (init_routine );
Module_exit (cleanup_routine );

Below is the makfile

Obj-m: = hello. o

KERNELDIR? =/Lib/modules/$ (shell uname-r)/build
PWD: = $ (shell pwd)

All:
$ (MAKE)-C $ (KERNELDIR) M = $ (PWD)

Clean:
Rm-rf *. o *~ Core. depend. *. cmd *. ko *. mod. c. tmp_versions

Save the file and compile it. If
Sysu @ sysu-desktop :~ /Driver $ make
Makefile: 10: *** the Delimiter is missing (you mean to use TAB to replace 8 spaces ?). Stop. Or
Root @ sysu-desktop :~ /Driver # make
Make: nothing can be done as 'all '.
The error is because the Makefile format is incorrect. The spaces in front of $ (MAKE) and rm-rf *. o * are completed by a TAB key.

Root @ sysu-desktop :~ /Driver # make
Make-C/lib/modules/2.6.24-19-generic/build M =/home/sysu/driver
Make [1]: Entering directory '/usr/src/linux-headers-2.6.24-19-generic'
LD/home/sysu/driver/built-in.o
CC [M]/home/sysu/driver/hello. o
Building modules, stage 2.
MODPOST 1 modules
CC/home/sysu/driver/hello. mod. o
LD [M]/home/sysu/driver/hello. ko
Make [1]: Leaving directory '/usr/src/linux-headers-2.6.24-19-generic'

All right, compilation successful.
Test:

Load Module
Root @ sysu-desktop :~ /Driver # insmod hello. ko

View module
Root @ sysu-desktop :~ /Driver # lsmod
Module Size Used
Hello 2432 0
I915 32512 2
Drm 82452 3 i915
Rfcomm 41744 2

Delete A Module
Root @ sysu-desktop :~ /Driver # rmmod hello

View output
Root @ sysu-desktop :~ /Driver # tail dmesg
[2, 173.995486] netdev watchdog: eth0: transmit timed out
[173.995506] eth0: Transmit timed out, status 00000000, resetting...
[173.995510] Rx ring dd7e4000: 80000000 80000000 80000000 80000000 80000000 80000000 80000000 80000000 80000000 80000000 80000000 80000000
[173.995527] Tx ring dd7eb000: 80000000 80000000 80000000 0000 80000000
[2, 2722.659875] module init
[2, 2833.604333] Cleanup module

The first driver ends pulling.