On Wed, Jun 17, 2009 at 2:55 PM, JohnQ <jqs@xxxxxxx> wrote:
Actually, thanks to hnaz on the kernelnewbies IRC channel, I have the solution. The issue is that the functions aren't exported unless your kernel module declares it's GPL. Once I added this:>>On Tue, May 05, 2009 at 02:42:18PM +0200, Moritz Horstmann wrote: >>> And this is what dmesg says when I try to load the dvb-core module on >>> the NAS: >>> >>> dvb_core: Unknown symbol class_destroy >>> dvb_core: Unknown symbol class_create >>> dvb_core: Unknown symbol class_device_create >>> dvb_core: Unknown symbol class_device_destroy >> >>These functions are not present in that kernel release. You can look in >>the git tree for what was done before they were present if you are >>really crazy enough to wish to backport something to a kernel release >>that is so many years old it's not even funny... >> >>Good luck, you will need it, >> >>greg k-hHi... I'd appreciate a bit of advice about this. I'm having the same trouble only with a 2.6.18 kernel which should have class_create, etc. Here's the kernel info...Linux 2.6.18-128.1.6.el5.centos.plus #1 SMP x86_64 x86_64 x86_64 GNU/LinuxI'm assuming something's not included in the kernel itself, so that when I do "insmod <mydriver.ko>" it fails with the messages below. The advice I'd like to get is this... what is missing from the kernel that needs to be included? I would have thought that "class_create" and the other device driver basics would have been fundamental and included by default in any kernel... so I'm confused on what to look for and how to determine if it's missing or not.Jun 16 18:11:14 vm01-08 kernel: SkaDriver: Unknown symbol class_destroy Jun 16 18:11:14 vm01-08 kernel: SkaDriver: Unknown symbol class_create Jun 16 18:11:14 vm01-08 kernel: SkaDriver: Unknown symbol class_device_create Jun 16 18:11:14 vm01-08 kernel: SkaDriver: Unknown symbol class_device_destroyAny advice appreciated... :)Thanks,John Q.
MODULE_LICENSE("GPL");
underneath the various includes, my kernel module loaded fine. Obviously, you have to be ok with declaring your code GPL.........
