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bruge funktioner i kernemodul fra userspaceprogram



hejsa
vi har lavet et lille kernemodul (dvs. 4 stk faktisk) til brug i
forbindelse med "ip-agtige" realtime kommunikation via ARCnet
forbindelser.
I den forbindelse har vi også lavet en lille ala-socket implementation
til at få sende data rigtigt ind i protokollen. Denne socket ting havde
vi forventning om at man kunne tilgå fra userspace via en headerfil, som
man normalt kan. Desværre så får vi en undefined reference til
funktionerne i vores socket ting, selv om de er erklæret extern i
header filen fra modulet. 
Et eller andet har vi misset, men jeg kan simpelthen ikke gennemskue
hvad. 
Så mit spørgsmål er:
hvad skal der præcist til for at få et userspace program til at bruge
funktioner i et kernemodul? 
(gerne en checkliste eller link til noget lignende)



 
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