[Linux-aus] create_proc_entry hangs the kernel

[Giriprasad Deviprasad]

Hi,





 The following program hangs the kernel, when the insmod on it, is run. Can any one provide ideas why :





#include <linux/module.h>       // for init_module()


#include <linux/proc_fs.h>      // for create_proc_info_entry()


#include <asm/io.h>             // for inb(), outb()





int my_func( char *buf, char **start, off_t off, int count, int *eof, void *data )


{


        return 0;


}





char modname[] = "cmos";


static int __init my_init( void )


{





        struct proc_dir_entry *pde, *tmp;


        tmp = kmalloc(sizeof(struct proc_dir_entry), GFP_KERNEL);


        pde= create_proc_entry(modname, S_IFDIR | S_IRUGO | S_IXUGO , tmp);





        pde->nlink = 1;


        pde->read_proc = my_func;


        if(pde)


                printk("proc_create sucessfull name = %s\n", pde->name);


        else


                printk("proc_create not so sucessfull. Exiting........... \n");


        return 0;


}





static void __exit my_exit(void )


{


        remove_proc_entry( modname, NULL );


        printk("Exiting ................\n");


}





module_init( my_init );


module_exit( my_exit );


MODULE_LICENSE("GPL");





Thanks,


Giriprasad






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