Thread: make: Nothing to be done for `all'. while compiling my first hello world kernel modul

hi all,
might not correct category post thread couldnt find correct category question posting here.

1. following basic tutorial learn compile first hello-world kernel module.
========================
/*
first_mod.c
first kernel module.
*/

#include <linux/module.h> /* needed modules */
#include <linux/kernel.h> /* needed kern_info*/
int init_module(void)
{
printk(kern_info "hello world 1.\n");

/*
* non 0 return means init_module failed; module can't loaded.
*/
return 0;
}

void cleanup_module(void)
{
printk(kern_info "goodbye world 1.\n");
}

========================

, makefile:
=========================
obj-m += first_mod.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
=========================

when make gives me error:
sudipto@sudipto-thinkpad-t61p:~/kernel_workspace/development/module_development$ ll
total 16
drwxr-xr-x 2 sudipto sudipto 4096 2011-07-02 20:47 ./
drwxr-xr-x 4 sudipto sudipto 4096 2011-07-02 19:52 ../
-rw-r--r-- 1 sudipto sudipto 396 2011-07-02 20:13 first_mod.c
-rw-r--r-- 1 sudipto sudipto 173 2011-07-02 20:47 makefile
sudipto@sudipto-thinkpad-t61p:~/kernel_workspace/development/module_development$ make
make: nothing done `all'.
sudipto@sudipto-thinkpad-t61p:~/kernel_workspace/development/module_development$

heavily appreciated

2. please suggest correct forum post question

http://ubuntuforums.org/forumdisplay.php?f=44 might more appropriate.

Forum The Ubuntu Forum Community Ubuntu Official Flavours Support Networking & Wireless [SOLVED] make: Nothing to be done for `all'. while compiling my first hello world kernel modul

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