Hi, I have a 405 based custom board (STB04xxxx), and I've been using the 2.4.17-mvl21 kernel that came with mvista preview kit.
I wrote a gpio driver that gives userland apps to control gpio ports. (no, i didn't use the IBM OCP gpio driver) It simply ioremaps the gpio's physical address and read and write registers by calling in_be32, out_be32. is this something i shouldn't do? anyways, it worked well with 2.4.17 kernel. however, with the kernel version 2.4.21-pre4, it oops on calling in_be32 or out_be32. the same once happened with the kernel 2.4.2 that also came with the monta vista preview kit. right before the kernel oops, it gives a message, "Data machine check in kernel mode", which i didn't see before. and NIP is at ">>NIP; c300a0a4 <[gpio_driver-dbg]__module_license+38/13c>" after examining the output of ksymoops. i don't know why it's at "__module_license" not only that this driver doens't work, also a couple of other drivers (not all) don't work (causing oops) anymore after the kernel is upgraded to 2.4.21-pre4 from 2.4.17. it's funny that other drivers that failed to be insmoded are failed at __module_license.. hmmm, i'm clueless as to why this happens.. can someone help me with this? your help would be greatly appreciated. thanks in advance. Q-ha Park ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
