into penguin.transmeta.com:/home/penguin/torvalds/repositories/kernel/linux

I missed one update of elv_add_request() in blk_insert_request(),
probably because of one too many hand edits...

Updates to ide-cd to be able to dma to any address (almost). The new
work-horse is cdrom_newpc_intr(). IMHO, it's much cleaner than the old
interrupt handlers, we can basically kill all three of them in the
future and just use this one. You had a lot of bugs in there :-)

If you want in-depth let me know, but I'm pretty beat right now and too
lazy to do the write up. Lots of cleanups, lots of fixes. pre-transform
is a prep function now.

Lots of stuff here... Basically we are using all that flashy
infrastructure I sent you to allow DMA for ATAPI at a 4-byte
granularity. So we can burns audio cds with zero-copy dma, and all that
cool stuff.

o Use bio_map_user(), fallback to kmalloc approach if it fails

o Use per-queue timeouts

o Check for right sg version, we can add old type support too later.

o Support SCSI_IOCTL_SEND_COMMAND old crap

o Check for size of command

o Make cdrom eject work

Etc...

o  Add sense_len to request, so scsi_ioctl knows how much sense data
   was transferred.

o Add sg_timeout and sg_reserved to queue, we can't have these global...

o And finally kill QUEUE_NR_REQUESTS, it hasn't been used in a while.

Various small bits that make SCSI work well with REQ_BLOCK_PC.

o Use ->errors as the scsi status byte for REQ_BLOCK_PC

o Always call end_io completion, even if 0 sectors, as long as the
  status is good. Otherwise we risk hanging this device if a
  REQ_BLOCK_PC user command didn't specify a transfer size for a command
  that did.

o Remove bouncing checks in scsi_merge for REQ_BLOCK_PC, bio_map_user()
  correctly bounces pages now.

o Decrement req->data_len, it's our residual data count.

o sr/sd: set right transfer and underflow size.

This adds bio_map_user and bio_unmap_user to aid drivers in mapping user
space memory into a bio suitable for block io.

into home.transmeta.com:/home/torvalds/v2.5/linux

into home.transmeta.com:/home/torvalds/v2.5/linux

Sometimes we don't even need a bio->bi_end_io, so make it optional. This
also encourages users to _use_ bio_endio()! I like that, since it means
they don't have to remember to decrement bi_size themselves.

Also clear bi_private in bio_init(), and switch to subsys_initcall().

Make merge_bvec_fn() return number of bytes we can accept at a given
offset, instead of a bool.

o Remove some ide compile warnings, old suspend stuff is not used at
  all, for instance.

o If elv_next_request() returns NULL, remember to clear hwgroup->busy
  if we don't have pending commands. This is important. If a queue
  prep function kills a request, we would before quit with hwgroup busy.
  This essentially froze the hwgroup.

o Don't do own list manipulation in ide_do_drive_cmd(). Use the new and
  great elv_add_request() functions

o Fix race on inspection of request after io completion by bumping the
  request reference count prior to ioscheduler insertion.

o Make ide-floppy understand a REQ_BLOCK_PC eject. More may follow, it's
  ATAPI after all.

o Clear hw before passing to ide_init_hwif_ports(). Fixes oops on
  non-pci controllers.

This adds an end_that_request_chunk() helper, that puts the core
functionality in __end_that_request_first().  This one deals in bytes.
end_that_request_first() does the 512 multiply, and then
end_that_request_chunk() can just use it directly.

This enables ide-cd to do proper dma in sizes that are not sector
aligned.  Some of the most important CD functions (ripping audio dma,
burning audio cds, burning raw cds) _require_ this or we will be in pio.
That stinks.  We simply cannot use pio for these, not on writers much
that are fast!

o Always use list_del_init() on request queuelist, this allows us to
  sanity check the integrity of the request on insertion and removal.
  So we can complain loudly instead of silently corrupting memory.

o Add references to requests. This is cheap, since we dont have to use
  an atomic variable for it (all puts are inside queue lock). We've had
  a bug in IDE for years where we want to inspect request state after
  io completion, but this is not possible to do race free right now.
  REQ_BLOCK_PC and sgio will need this too, for checking io residual
  etc. This is not just a theoretical race, I've seen it happen.

Cleanup the last_merge logic. There are two reasons for clearing
last_merge when we are dealing with integrity, and these are:

o Clear when handing the request to the driver, so we don't merge on
  a started request.

o Clear when a request is taken off the list. This cannot be done from
  the driver (above case would already have been hit), but it can
  happen
  when we merge two requests.

This makes it a lot nicer, it was always peculiar how we cleared in
put_request.

Make it possible for a device to specify the dma alignment restrictions
it has. This will be used by future infrastructure when mapping in user
pages, and allows us to dma to on ATAPI even though user address and
length is not sector size aligned.

Extend q->prep_rq_fn() to return one of three values:

 o BLKPREP_OK: request is good, return it
 o BLKPREP_KILL: request is bad, end it completely
 o BLKPREP_DEFER: request is good, but we can't take it now

We maintain compatability with old prep functions (if any, outside of
ide-cd). This change is needed or SCSI to use prep function for command
init, if sg table allocation fails we can just defer the request.

Add some missing bits, and make it generally a bit more useful outside
of REQ_PC requests.

Request insertion in the current tree is a mess. We have all sorts of
variants of *elv_add_request*, and it's not at all clear who does what
and with what locks (or not). This patch cleans it up to be:

o __elv_add_request(queue, request, at_end, plug)
      Core function, requires queue lock to be held

o elv_add_request(queue, request, at_end, plug)
      Like __elv_add_request(), but grabs queue lock

o __elv_add_request_pos(queue, request, position)
      Insert request at a given location, lock must be held

We must return -EIO if the command fails (the 5/20/00 sense check is
just helping return more sane info), not -EINVAL. Getting -EINVAL return
on an ioctl if a command fails is less than helpful for applications...

o Split blk_queue_bounce() into a slow and fast path. The fast path is
  inlined, only if we actually need to check the bio for possible
  bounces (and bounce) do we enter __blk_queue_bounce() slow path.

o Fix a nasty bug that could cause corruption for file systems not
  using PAGE_CACHE_SIZE blok size! We were not correctly setting the
  'to' bv_offset correctly.

o Add BIO_BOUNCE flag. Later patches will use this for debug checking.

Make deadline_merge() prefetch the next entry on the list.

wake_up_interruptible() and _sync() calls are reversed in pipe_read().

The attached patches only calls _sync if a schedule() call follows.

in struct pci_dev.

I found that functions in timer.c and rcupdate.c are calling
> tasklet_init() for all CPUs before APs start running.  For this to work,
the per-CPU pages must be allocated at BSP-initialization time.  The patch
below does that.

/proc/kcore is what you need, but it is broken on ia64 (and
has been since the dawn of time for access to region 5) because
it assumes that all kernel virtual addresses are above PAGE+AF8-OFFSET.
This isn't true on ia64, VMALLOC+AF8-START is smaller than PAGE+AF8-OFFSET.

Attached is a patch (applies to 2.4.19 and to 2.5.39) that fixes the
assumption.  After applying you'll be able to use:

        +ACM- gdb vmlinux /proc/kcore

and happily ask gdb to examine addresses in region 5.

(suggested by Peter Chubb)

into redhat.com:/home/jgarzik/repo/net-drivers-2.5