doubts regarding EXPORT_SYMBOL & other questions

[rbharath007]

Hi,

I am working on linux for OMAP 1510. I am writing a driver that will call routines present in the sound driver (specifically ones in omap-audio.c). the function I want to call are audio_write and audio_read.

Now.

1)Do I need to include the header file (with function declarations ) of the driver (omap-audio.c), which has the EXPORT_SYMBOL code, in order to call the exported function? omap-audio.c does not have a header file ?

2) I am trying to compile my driver module and I am getting a weird error.

The error is as follows

----------------------------------------------------------------------
In file included from /home/bharat/linux-2.4.20_mvlcee30/include/linux/fs.h:215,
from sound_interface.c:4:
/home/bharat/linux-2.4.20_mvlcee30/include/asm/semaphore.h: In function `down':
/home/bharat/linux-2.4.20_mvlcee30/include/asm/semaphore.h:88: unknown register name `lr' in `asm'
/home/bharat/linux-2.4.20_mvlcee30/include/asm/semaphore.h:88: unknown register name `ip' in `asm'
/home/bharat/linux-2.4.20_mvlcee30/include/asm/semaphore.h: In function `down_interruptible':
/home/bharat/linux-2.4.20_mvlcee30/include/asm/semaphore.h:101: unknown register name `lr' in `asm'
/home/bharat/linux-2.4.20_mvlcee30/include/asm/semaphore.h:101: unknown register name `ip' in `asm'
/home/bharat/linux-2.4.20_mvlcee30/include/asm/semaphore.h: In function `down_trylock':
/home/bharat/linux-2.4.20_mvlcee30/include/asm/semaphore.h:110: unknown register name `lr' in `asm'
/home/bharat/linux-2.4.20_mvlcee30/include/asm/semaphore.h:110: unknown register name `ip' in `asm'
/home/bharat/linux-2.4.20_mvlcee30/include/asm/semaphore.h: In function `up':
/home/bharat/linux-2.4.20_mvlcee30/include/asm/semaphore.h:125: unknown register name `lr' in `asm'
/home/bharat/linux-2.4.20_mvlcee30/include/asm/semaphore.h:125: unknown register name `ip' in `asm'

-------------------------------------------------------------

I am including the following

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/config.h>
#include <linux/fs.h>
#include <linux/miscdevice.h>
#include <linux/poll.h>

if i change the order to include, lets say, poll.h first then the same error occurs because of a file included by poll.h instead of fs.h as shown in the error message.

Any ideas why this error message occurs.

[rbharath007]

I am working on Linux 2.4 and my make file is like this

KERNELDIR=/home/bharat/linux-2.4.20_mvlcee30


include $(KERNELDIR)/.config

CFLAGS = -D__KERNEL__ -DMODULE -I$(KERNELDIR)/include -I. -o -Wall

ifdef CONFIG_SMP
CFLAGS += -D__SMP__ -DSMP
endif

all: sound.o

sound.o: sound_interface.o
$(ld) -r $(CC) -o $(CFLAGS)

clean:
rm -f *.o *~ core