> >   Does coccinelle need driver to be compiled as a module? As hdm_dim2 
> driver 
> > is not but sm750fb driver is compiled as a module. Does coccinelle 
> require 
> > executable file to work? 
>
> No, it just looks at the source code.  It doesn't care about modules, etc.

    
    Then it is strange, as I tried again with different drivers, few of 
them work and few others don't.
    
    Drivers compiled as module and got output : iio and sm750fb
    Drivers not compiled as module but still got output: lustre and greybus
    Drivers not compiled as module and no output: most (all drivers) and 
netlogic


> Could you try the original experiment again?  Maybe the problem is somehow 
> resolved. 
>
>     Same output.
    
   spatch --sp-file ret.cocci --no-includes  
~/git/kernels/staging/drivers/staging/most/hdm-dim2/dim2_sysfs.c  > ret.out 
   init_defs_builtins: /usr/lib64/coccinelle/standard.h
   HANDLING: 
   
/home/varsha/git/kernels/staging/drivers/staging/most/hdm-dim2/dim2_sysfs.c

   Thanks,
   Varsha