Re: compiling kernel module for UML

["Chetan Nanda" <chetannanda@xxxxxxxxx>]

On Tue, Sep 30, 2008 at 11:50 PM, arshad hussain <arshad.super@xxxxxxxxx> wrote:

On Tue, Sep 30, 2008 at 11:12 PM, Chetan Nanda <chetannanda@xxxxxxxxx> wrote:
> Hi All,
>
> I am trying my hands with User mode Linux.
> I am able to configure and kernel 2.6.24 under UML.
>
> Next It am trying to compile kernel module (so that modules can be insmod
> into running UML).
> But not able to compile my kernel module for UML.

Hoping you are not missing "ARCH=um" in your "Makefile".
You also need the linux source.

My Make file look like this:
##############
CC=gcc
ARCH=um
KERNELDIR=/root/Work/linux_src/linux-source-2.6.24
ARCHDIR=$(KERNELDIR)/arch/um
TTDIR=$(ARCHDIR)/kernel/tt
SKASDIR=$(ARCHDIR)/kernel/skas
CFLAGS= -DDEBUG -D__KERNEL__ -DMODULE -I$(KERNELDIR)/include -I$(ARCHDIR)/include  -I$(TTDIR)/include -I$(SKASDIR)/include -Wall -Wunused -Wuninitialized -g -O
ALL = hello_1.o

all: $(ALL)
################

But on compiling module using 'make' make command gives me following error:
                 from hello_1.c:7:
/root/Work/linux_src/linux-source-2.6.24/include/asm/thread_info.h: In function 'current_thread_info':
/root/Work/linux_src/linux-source-2.6.24/include/asm/thread_info.h:50: error: 'CONFIG_KERNEL_STACK_ORDER' undeclared (first use in this function)
/root/Work/linux_src/linux-source-2.6.24/include/asm/thread_info.h:50: error: (Each undeclared identifier is reported only once
/root/Work/linux_src/linux-source-2.6.24/include/asm/thread_info.h:50: error: for each function it appears in.)

Do I still missing something ?

Thanks,
Chetan Nanda

>
> Please point me into right direction.
>
> Thanks,
> Chetan Nanda
>
>