Thanks to a swift response, my problem was solved--apparently I just needed to symlink /usr/include/asm to /usr/src/linux/include/asm-i386
Though I wonder what made me suddenly need the symlink, if I didn't have it before, or what made me lose it if I did have it before. (I notice I did already have an asm-i386 symlink pointing to the right place, just not an asm link.) -- Tom "Common sense is the collection of prejudices acquired by age eighteen." -Albert Einstein