Logical, Linear and Virtual Address.

Hi Everyone! Friends, could someone explain me the difference between Kernel Logical and Kernel Virtual Address? I'm reading Linux Device Drivers 3th, but I did not understand about that. I have a macro vision about Kernel Virtual Address (virtual address is used do hide the paging mechanism and physical memory, I think), and Linear is the address used in to evaluate to the physical (using page directory+page table+offset). But and the Kernel Logical Address? Why Logical Address is Virtual Address, but not all Virtual Address is a Logical Address? Regards. Atenciosamente, Gustavo da Silva