hi,
I was trying the procfs.c program in Chapter 4 of
LKMPG. It compiled but with a lot of warnings. Then
when we tried it to insert using insmod it gave me
this error:
#insmod procfs.o
procfs.o: unresolved symbol proc_register
procfs.o: unresolved symbol proc_unregister
#
I am using kernel:2.4.9
gcc: 2.96
Actuallt the warnings that i got suring compilation
are really huge. They are :
------------
# gcc -D__KERNEL__ -DMODULE -DLINUX -Wall
-I/usr/src/linux/include -O2 -c procfs.c
In file included from
/usr/src/linux/include/linux/fs.h:19,
from
/usr/src/linux/include/linux/capability.h:17,
from
/usr/src/linux/include/linux/binfmts.h:5,
from
/usr/src/linux/include/linux/sched.h:9,
from
/usr/src/linux/include/linux/mm.h:4,
from
/usr/src/linux/include/linux/slab.h:14,
from
/usr/src/linux/include/linux/proc_fs.h:5,
from procfs.c:15:
/usr/src/linux/include/linux/dcache.h: In function
`dget':
/usr/src/linux/include/linux/dcache.h:244: warning:
implicit declaration of function
`printk_Rsmp_1b7d4074'
procfs.c: In function `module_output':
procfs.c:54: warning: implicit declaration of function
`sprintf_Rsmp_3c2c5af5'
procfs.c: At top level:
procfs.c:123: warning: initialization from
incompatible pointer type
procfs.c:124: warning: initialization from
incompatible pointer type
procfs.c:129: warning: initialization from
incompatible pointer type
procfs.c:133: warning: initialization from
incompatible pointer type
procfs.c:139: warning: initialization from
incompatible pointer type
procfs.c:156: warning: excess elements in struct
initializer
procfs.c:156: warning: (near initialization for
`Inode_Ops_4_Our_Proc_File')
procfs.c: In function `init_module':
procfs.c:175: warning: implicit declaration of
function `proc_register'
procfs.c: In function `cleanup_module':
procfs.c:183: warning: implicit declaration of
function `proc_unregister'
#
-------------
The lines 123 - 129 are :
----snip-----
static struct file_operations File_Ops_4_Our_Proc_File
=
{
NULL,
module_output,
module_input,
NULL,
NULL,
NULL,
NULL,
module_open,
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,2,0)
NULL,
#endif
module_close,
};
---- snip ------
this program segment is giving me the incompatible
pointer type warnings.
What should I do to correct all these errors.
TIA
Karthik
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