Today I attempted to submit a kernel source tree into CVS and was surprised when I found out that the …/drivers/sound/core/ was missing. Luckily, the fix was to simply include the -I ! parameter like so:
cvs import -I ! kernel/ INITIAL start
This parameter prevents CVS from ignoring folders like core. Here’s an excerpt from the cvs man page:
-I name Specify file names that should be ignored during import. You can use this option repeatedly. To avoid ignoring any files at all (even those ignored by default), specify `-I !'.