Hi Prasad, The running kernel version has to EXACTLY match with the kernel source tree that you are compiling your module against. This includes the EXTRA_VERSION information in the makefile. For e.g, a running "2.6.9-5.EL" (Redhat) kernel won't be able to load a module compiled against 2.6.9. Also, I think (but I'm not sure) that the compiler must be the same that was used in compiling the kernel. Can somebody please confirm this? Thanks, Rajat -----Original Message----- From: kernelnewbies-bounce@xxxxxxxxxxxx [mailto:kernelnewbies-bounce@xxxxxxxxxxxx]On Behalf Of prasad hegde Sent: Thursday, July 05, 2007 7:05 AM To: kernelnewbies Subject: problem with registering net_dev Hi, I am a newbie trying to learn working of network device. I was trying a stripped down version of snull.c example in ldd3 I am not able to load the module. dmesg says net_drive: disagrees about version of symbol alloc_netdev net_drive: Unknown symbol alloc_netdev Even though I am running 2.6.20 and my code is also compiled against 2.6.20, they both are different kernels. Is this a problem, I dont think so. My relevant code snippet is int snull_init_module(void) { int result, i, ret = -ENOMEM; /* Allocate the devices */ snull_devs[0] = alloc_netdev(sizeof(struct snull_priv), "sn%d", snull_init); snull_devs[1] = alloc_netdev(sizeof(struct snull_priv), "sn%d", snull_init); if (snull_devs[0] == NULL || snull_devs[1] == NULL) goto out; out: if (ret) return ret; } void snull_init(struct net_device *dev ) { return; } module_init(snull_init_module); Any help or pointers are appreciated. Thanks Prasad. -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx Please read the FAQ at http://kernelnewbies.org/FAQ
