problem compiling kernel module

fbarsoba · 04-19-2006, 07:19 AM

Hi,

I am really stuck with this thing.. For couple of days i have been trying to compile a kernel module. I have been following the info in http://www.faqs.org/docs/kernel/x204.html. But no success... i recompiled the latest kernel version, and i think i trying to compile the module against the source code for that kernel.. however, strange errors appear.

Please any help will be appreciated.

Here's the error:

Code:

[fbarsoba@localhost ~]$ cd workspace/kernel_tests/
[fbarsoba@localhost kernel_tests]$ make
gcc -O2 -DMODULE -D__KERNEL__ -W -Wall -Wstrict-prototypes -Wmissing-prototypes -isystem /lib/modules/`uname -r`/build/include   -c -o hello-1.o hello-1.c
In file included from /lib/modules/2.6.16.7/build/include/linux/spinlock.h:87,
                 from /lib/modules/2.6.16.7/build/include/linux/capability.h:45,                 from /lib/modules/2.6.16.7/build/include/linux/sched.h:7,
                 from /lib/modules/2.6.16.7/build/include/linux/module.h:10,
                 from hello-1.c:3:
/lib/modules/2.6.16.7/build/include/asm/spinlock.h: In function ‘__raw_spin_lock’:
/lib/modules/2.6.16.7/build/include/asm/spinlock.h:42: error: expected ‘:’ or ‘)’ before ‘KBUILD_BASENAME’
/lib/modules/2.6.16.7/build/include/asm/spinlock.h: In function ‘__raw_read_lock’:
/lib/modules/2.6.16.7/build/include/asm/spinlock.h:96: error: expected ‘:’ or ‘)’ before ‘KBUILD_BASENAME’
/lib/modules/2.6.16.7/build/include/asm/spinlock.h:96: error: expected expression before ‘else’
/lib/modules/2.6.16.7/build/include/asm/spinlock.h: In function ‘__raw_write_lock’:
/lib/modules/2.6.16.7/build/include/asm/spinlock.h:101: error: expected ‘:’ or ‘)’ before ‘KBUILD_BASENAME’
/lib/modules/2.6.16.7/build/include/asm/spinlock.h:101: error: expected expression before ‘else’
In file included from /lib/modules/2.6.16.7/build/include/linux/sched.h:20,
                 from /lib/modules/2.6.16.7/build/include/linux/module.h:10,
                 from hello-1.c:3:
/lib/modules/2.6.16.7/build/include/asm/semaphore.h: In function ‘down’:
/lib/modules/2.6.16.7/build/include/asm/semaphore.h:112: error: expected ‘:’ or ‘)’ before ‘KBUILD_BASENAME’
/lib/modules/2.6.16.7/build/include/asm/semaphore.h: In function ‘down_interruptible’:
/lib/modules/2.6.16.7/build/include/asm/semaphore.h:137: error: expected ‘:’ or ‘)’ before ‘KBUILD_BASENAME’
/lib/modules/2.6.16.7/build/include/asm/semaphore.h: In function ‘down_trylock’:/lib/modules/2.6.16.7/build/include/asm/semaphore.h:161: error: expected ‘:’ or ‘)’ before ‘KBUILD_BASENAME’
/lib/modules/2.6.16.7/build/include/asm/semaphore.h: In function ‘up’:
/lib/modules/2.6.16.7/build/include/asm/semaphore.h:184: error: expected ‘:’ or ‘)’ before ‘KBUILD_BASENAME’
make: *** [hello-1.o] Error 1

And here are the files:

Code:

/*  hello-1.c - The simplest kernel module.
 */
#include <linux/module.h>  /* Needed by all modules */
#include <linux/kernel.h>  /* Needed for KERN_ALERT */


int init_module(void)
{
   printk("<1>Hello world 1.\n");

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


void cleanup_module(void)
{
  printk(KERN_ALERT "Goodbye world 1.\n");
}

Code:

TARGET  := hello-1
WARN    := -W -Wall -Wstrict-prototypes -Wmissing-prototypes
INCLUDE := -isystem /lib/modules/`uname -r`/build/include
CFLAGS  := -O2 -DMODULE -D__KERNEL__ ${WARN} ${INCLUDE}
CC              := gcc

${TARGET}.o:    ${TARGET}.c

.PHONY: clean

clean:
        rm -rf {TARGET}.o

Hexstatic · 04-20-2006, 10:42 AM

Hi,

I might be wrong but it looks like you're trying to build an old style (2.4 series) module with a 2.6 series kernel, things have changed with 2.6 series for modules, so that code won't work anymore.

There's a hello world module tutorial for 2.6 over here:

http://lwn.net/Articles/driver-porting/

It mentions 2.5 kernels but don't worry about it, i've just tried it with 2.6.16 and it works.

--Hexstatic

fbarsoba · 04-20-2006, 10:55 AM

Yup. That was the problem.. thanks a lot!

Fernando