If some fields are empty or look unusual you may have an old version.
Compare to the current minimal requirements in Documentation/Changes.
 
Linux mrtilaptop 2.6.38-gentoo-r6 #1 SMP PREEMPT Thu Aug 4 23:50:34 CEST 2011 x86_64 Intel(R) Core(TM) i7 CPU Q 740 @ 1.73GHz GenuineIntel GNU/Linux
 
Gnu C                  4.5.2
Gnu make               3.82
binutils               2.20.1.20100303
util-linux             2.19.1
mount                  support
module-init-tools      3.16
e2fsprogs              1.41.14
reiserfsprogs          3.6.21
reiser4progs           1.0.7
xfsprogs               3.1.5
PPP                    2.4.5
Linux C Library        2.13
Dynamic linker (ldd)   2.13
Procps                 3.2.8
Net-tools              1.60_p20110409135728
Kbd                    1.15.3wip
Sh-utils               8.12
wireless-tools         30
Modules Loaded         tun bluetooth snd_seq_oss snd_seq_midi_event snd_seq snd_seq_device snd_pcm_oss snd_mixer_oss nvidia snd_hda_codec_hdmi snd_hda_codec_realtek usbhid snd_hda_intel snd_hda_codec snd_hwdep snd_pcm usb_storage snd_timer asus_laptop video sparse_keymap snd backlight i2c_core snd_page_alloc rfkill processor thermal battery button ehci_hcd xhci_hcd usbcore sg thermal_sys ac atl1c pcspkr