Hello Mohan,
I think you have to add the following 2 lines to your code
#define __KERNEL__
#define MODULE
remove <linux/sched.h>
It compiled in my machine(Linux 7.0)
regards
daniel.
"C.Mohanasundaram" wrote:
> Hi all,
>
> i was trying to write a kernel module and i got some compilation error when i
> included sched.h. so i wrote a simple module to test it. i got the same
> compilation error.I have given the code, makefile and also the dump of the
> error below. What is the mistake i m doing
> I m using RedHat 7.1 and my kernel version is 2.4.2-2 on an i686
>
> /*code*/
>
> #include <linux/kernel.h>
> #include <linux/module.h>
> #include <linux/sched.h>
>
> int init_module()
> {
> printk("Hello");
> }
>
> void cleanup_module()
> {
> printk("Bye");
> }
>
> #------------------------------------
> #makefile
> #------------------------------------
>
> KERNELDIR=/usr/src/linux-2.4.2
>
> testmod.o :
> gcc -DKERNEL -DMODULE -DLINUX -O2 -Wall -I$(KERNELDIR)/include -c testmod.c
>
> clean :
> rm -f *.o *~ core
>
> ######################
> #compilation error
> ######################
> In file included from /usr/src/linux-2.4.2/include/linux/sched.h:15,
> from testmod.c:3:
> /usr/src/linux-2.4.2/include/linux/timex.h:171: field `time' has incomplete
> type
> In file included from /usr/src/linux-2.4.2/include/linux/sched.h:80,
> from testmod.c:3:
> /usr/src/linux-2.4.2/include/linux/timer.h:21: field `vec' has incomplete type
> /usr/src/linux-2.4.2/include/linux/timer.h:26: field `vec' has incomplete type
> /usr/src/linux-2.4.2/include/linux/timer.h:52: field `list' has incomplete
> type
> /usr/src/linux-2.4.2/include/linux/timer.h: In function `timer_pending':
> /usr/src/linux-2.4.2/include/linux/timer.h:111: warning: control reaches end
> of non-void function
> testmod.c: In function `init_module':
> testmod.c:7: warning: implicit declaration of function `printk'
> testmod.c:8: warning: control reaches end of non-void function
> make: *** [testmod.o] Error 1
>
> thanks and regards,
> mohan
> -
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