Changes from 1.2.8 to 1.2.9

These changes are archived on ftp.crynwr.com:pub/kchanges and http://www.crynwr.com/kchanges. I cannot answer questions about Linux -- I merely summarize the kernel patches after reading them. I try to make them useful to everyone, but kernel hackers should take them with a grain of salt and read the patches themselves. The patch file is patch-1.2.9.gz

• Fix the hang-during-reboot bug only seen on some machines.
• Some dual-ide-controllers are horribly broken and can't handle concurrent use of both controllers. If you have a CMD-640 and use both controller interfaces, use the kernel command line "hda=serialize" to make the driver serialize the requests to the controllers. Otherwise the controller may get confused and do major filesystem damage.
• Cyclades distinguishes between cyclom-16Y and Cyclom-32Ye.
• Remove useless code from loopback driver that was an attempt to speed it up.
• Fix some debugging code in SCSI tape driver that would print spurious errors.
• The filesystem buffering works better if we wait for buffers to be read in reverse order.
• Oops, we missed a test for immutable files in the chmod/fchmod/chown/fchown calls.
• Ported start_bh_atomic() and end_bh_atomic() to all architectures.
• Catch a null pointer dereference in module code for registering symbols when a module is loaded.
• Remove the socket from the list before releasing it.
• Be sure to return the right error if a connection failed while a new one is being made.
• Fixed network driver calling to really be non-re-entrant within the drivers. Should fix a few more ne2000 probs.
• If the length of an IP header is less than the header claims it should be, drop it.
• Remove an invalid test for the multicast TTL that prohibited it from being set to zero.
• On Unix sockets, indicate that we need write permission.
• Make sure that genksyms is in /sbin before attempting to run it (when we make modules).
• IDE fixes:
  • add SINGLE_THREADED flag for use with dual-CMD i/f
  • ignore WRERR_STAT for non-write operations
  • added VLB_SYNC support for DC-2000A & others, (incl. some Promise chips), courtesy of Frank Gockel
  • convert VLB_32BIT and VLB_SYNC into runtime flags
  • add ioctls to get/set VLB flags (HDIO_[SG]ET_CHIPSET)
  • rename SINGLE_THREADED to SUPPORT_SERIALIZE,
  • add boot flag to "serialize" operation for CMD i/f
  • add optional support for DTC2278 interfaces, courtesy of andy@cercle.cts.com (Dyan Wile).
  • add boot flag to enable "dtc2278" probe
  • add probe to avoid EATA (SCSI) interfaces, courtesy of neuffer@goofy.zdv.uni-mainz.de.

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