packet, to work around the problem whereby small TX rings get backed
up because we haven't yet poll()ed for TX completions.

Added redundant call to get_memmap() in int13_boot() immediately
before jumping to boot sector, to assist in debugging.

main tree yet, but reserving the error numbers now avoids problems later).

to construct DHCP packets suitable for Infiniband.

the assert message's file and line number gives some clue as to the
real location of the problem.

Added similar assertions to list.h.

the TCP window to compensate.

crash the machine.

tracking down a bug that turned out to be a free_iob() used where I
needed a netdev_tx_complete().  This left the freed I/O buffer on the
net device's TX list, with bad, bad consequences later.

Also fixed the bug in question.

the assert message's file and line number gives some clue as to the
real location of the problem.

Added similar assertions to list.h.