I was wondering. As I recall, there was a version or busybox you could install on the N900. If you havn't installed it give it a try and then see what uname - a gives.
Linux Nokia-N900-42-11 2.6.28.10maemo-omap1 #1 PREEMPT Tue Apr 13 10:48:47 EEST 2010 armv7l unknown
Linux Nokia-N900-42-11 2.6.28-omap1 #1 PREEMPT Fri Aug 6 11:50:00 EEST 2010 armv7l unknown
Linux Nokia-N900 2.6.28.10-power50 #1 PREEMPT Sun Mar 18 20:10:56 EET 2012 armv7l unknown
Linux Nokia-N900-51-1 2.6.28.10-power51 #1 PREEMPT Mon Jul 23 16:41:15 EEST 2012 armv7l GNU/Linux
Linux Nokia-N900 2.6.28.10-cssu3 #1 PREEMPT Sat Jul 28 18:05:05 EDT 2012 armv7l unknown
linux Nokia-N900 2.6.28.10-power52 #1 PREEMPT Sat Apr 6 11:59:23 UTC 2013 armv7l GNU/Linux
TimmyT Linux Nokia-N900 2.6.28-omap1 #1 PREEMPT Thu Apr 15 09:47:09 EEST 2010 armv7l unknown spark666 Linux Nokia-N900 2.6.28.10-power50 #1 PREEMPT Sun Mar 18 20:10:56 EET 2012 armv7l unknown DocScrutinizer Linux IroN900 2.6.28-omap1 #1 PREEMPT Fri Aug 6 11:50:00 EEST 2010 armv7l GNU/Linux Pali freemangordon, uname -a: Linux Pali-Nokia-N900 2.6.28.10-cssu1 #1 PREEMPT Sat May 26 09:16:14 EDT 2012 armv7l GNU/Linux HRH_H_Crab Linux OpenWrt 2.6.32.27 #5 Wed Dec 21 05:56:26 CET 2011 mips GNU/Linux DocScrutinizer05 Linux t900 2.6.28.10power46 #1 PREEMPT Sun Dec 12 03:11:24 EET 2010 armv7l unknown _Lena Linux Nokia-N900 2.6.28.10-bfs10 #1 PREEMPT Wed Jan 4 22:28:20 EET 2012 armv7l u neil it says: Linux Nokia-N900 2.6.28-omap1 #1 PREEMPT Sun Aug 8 09:50:47 BST 2010 armv7l unknown Satorin Linux Nokia-N900 2.6.28.10-cssu3 #1 PREEMPT Sat Jul 28 18:05:05 EDT 2012 armv71 unknown DocScrutinizer05 Linux IroN900 2.6.28-omap1 #1 PREEMPT Fri Aug 6 11:50:00 EEST 2010 armv7l GNU/Linux jurop uname -a gives Linux Nokia-N900-42-11 2.6.28.10-power53 #1 PREEMPT Wed Dec 10 13:52:39 UTC 2014 armv7l GNU/Linux