"expected specifier-qualifier-list" ERROR while adding a new system call
 

Hi,

I have tried to add a new system call. I am using Fedora linux 6 ..Kernel 2.6.18.2
I followed the document http://nd.edu/~ablaich/system_call_i...n_a_blaich.txt to add a new system call.

During compilation I got the following error. I have place my system call code in ~/ipc/ which is also as follows. Does any body has idea about this error.
___________________________________________________________
In file included from include/linux/shm.h:4,
from ipc/mycall.c:2:
include/linux/ipc.h:59: error: expected specifier-qualifier-list before ‘spinlock_t’
ipc/mycall.c:3:21: error: inttypes.h: No such file or directory
make[1]: *** [ipc/mycall.o] Error 1
make: *** [ipc] Error 2
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/*System call code*/

#include<linux/linkage.h>
#include<linux/shm.h>
#include<linux/types.h>


asmlinkage long sys_mycall(int i)
{
return i+10;
}_____________________________________________