oss modules unknown symbols in 2.5.55

HI, sound ad modules in kernel 2.5.55 down not work anymore, because modules
cannot be loaded due to unknown symbols:

soundcore: Unknown symbol errno
i810_audio: Unknown symbol register_sound_mixer
soundcore: Unknown symbol errno
sound: Unknown symbol register_sound_dsp
v_midi: Unknown symbol midi_devs
soundcore: Unknown symbol errno
sound: Unknown symbol register_sound_dsp
opl3: Unknown symbol note_to_freq
soundcore: Unknown symbol errno
sound: Unknown symbol register_sound_dsp
mpu401: Unknown symbol do_midi_msg
soundcore: Unknown symbol errno
sound: Unknown symbol register_sound_dsp
uart401: Unknown symbol midi_devs
sound: Unknown symbol register_sound_dsp
opl3: Unknown symbol note_to_freq
soundcore: Unknown symbol errno

Hope this helps

Luigi

p.s.
yes, I know I should use alsa, but I like OSS...