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From: Bernd Petrovitsch <bernd@petrovitsch.priv.at>
To: "Irfan Ullah (울라 이르판)" <irfan@dke.khu.ac.kr>,
	kernelnewbies@kernelnewbies.org
Subject: Re: Kernel Module with multiple source files not initializing
Date: Sun, 27 Oct 2019 09:43:32 +0100
Message-ID: <eba9c990e8a43607cfe79aa64872640c3b16e038.camel@petrovitsch.priv.at> (raw)
In-Reply-To: <CA+mB8Oz1Hu82nk2vbinhpOQW8uasp7_b8CFNf2jNovqP==OH6A@mail.gmail.com>

Hi all!

On 25/10/2019 11:14, Irfan Ullah (울라 이르판) wrote:
> Dear All,
> I have developed a kernel module consists of one source file that sends
> and receives  message to the user space.  I have spitted the source code
> in two files, and now I  am trying to develop kernel module from these
> source files. After compiling and linking without any problems, I insmod
> the module but I didn’t see any of the printk() I wrote, in fact, the
> module can be inserted and removed, but it does nothing. Code is in the
> attached file zipped file.
> I tried many things , e.g.,  link <https://paguilar.org/?p=7>1, link2
> <https://www.linuxquestions.org/questions/linux-kernel-70/kernel-module-with-multiple-source-files-not-initializing-886190/>;,
> and link3
> <https://android.googlesource.com/kernel/msm/+/android-msm-dory-3.10-kitkat-wear/Documentation/kbuild/modules.txt> etc. 
> but nothings worked out. 
> I also used /nm/ to inspect the module, but, as expected, there was no> signs of "__init and __exit" functions can in the output.

To be exact, you are looking for the hello_init function.
Since "nm" doesn't show it, it's either not there or
"static".

[ for the nm-output see in the OPs mail ]
> Can you please help me: what's the problem/mistake I am doing?
> Thank you very much.

Get rid of the "static" for the hello_init and hello_exit function.

MfG,
	Bernd
-- 
Bernd Petrovitsch                  Email : bernd@petrovitsch.priv.at
                     LUGA : http://www.luga.at


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Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-10-25  9:14 Irfan Ullah (울라 이르판)
2019-10-25 16:15 ` Abu Rasheda
2019-10-27  7:11   ` Irfan Ullah (울라 이르판)
2019-10-27  8:43 ` Bernd Petrovitsch [this message]
2019-10-28  9:43   ` Irfan Ullah (울라 이르판)
2019-10-28 10:04     ` Bernd Petrovitsch
2019-10-29  8:30       ` Irfan Ullah (울라 이르판)
2019-11-05 16:52 ` Aruna Hewapathirane
2019-11-07  1:50   ` Irfan Ullah (울라 이르판)

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