[openib-general] Reserved L_Key API

[Roland Dreier]

    Dror> Think of Tavor as a software friendly design. Use: start
    Dror> address = 0x0000000000000001 length = 0xffffffffffffffff pa
    Dror> = 1 And then you got all memory space mapped + protection
    Dror> violation if you try to access a NULL pointer :)

That's cute :) But I think 0x0 is more likely to be a valid DMA
address than 0xffffffffffffffff (I seem to remember this coming up
when pci_dma_mapping_error() was added to the kernel).

 - R.