Small, but tricky: fix for check_disk_change() deadlocks.
What we do is
	a) opening block device shifted from check_partition() to
	   grok_partitions(); check_partitions() takes opened
	   struct block_device.
	b) all callers of check_disk_change() fall in two groups -
	   ones that are called only from some ->open() and ones
	   that are _never_ called from ->open().  There is no
	   middle ground.  We split the thing in two functions -
	   check_disk_change() for the first class and full_check_....
	   for the second.  The former (ones inside ->open()) doesn't
	   touch partition tables but marks the bdev as "had been
	   invalidated".  In the end of do_open() we check if
	   bdev is marked and call wipe_partitions()/check_partition()
	   if it is - at that point bdev is fully set up and ready.
	c) ->bd_part_sem kludge is gone - we use ->bd_sem instead.
	   That is, do_open() on a partition grabs ->bd_sem on entire
	   disk and picks partition data while under it; do_open() on
	   entire disk rereads partition if needed before dropping
	   ->bd_sem (right before dropping it); BLKRRPART does
	   trylock on ->bd_sem and then checks ->bd_part_count -
	   same logics as before, except that we use ->bd_sem instead
	   of ->bd_part_sem.

That kills recursive open(), gives us the same exclusion rules as
we had and makes sure that actual IO (including rereading partition
tables) is done only when we are ready to do it.

It actually sounds a lot nastier than it is.  do_open() is a one sick
puppy right now, but we have everything in one place and _out_ of drivers
(and 20-odd equally sick puppies are gone from them, along with about
the same number of races).

Now we are almost ready to clean it up for good - all that remains to
do before that is to get the rest of drivers (cciss, DAC960, i2o and
a couple of ancients - xd and acsi) using per-disk gendisks.  Then
most of that crap will disappear.

BTW, the only generic ioctl remaining in the drivers is HDIO_GETGEO -
a lot of foo_ioctl() starts with if (cmd != HDIO_GETGEO) return -EINVAL; ;-)

ps2esdi.c switched to per-disk gendisks

cpqarray.c switched to per-disk gendisks

Big One.  Flushing/rereading partition tables is taken from
->revalidate() for partitioned devices; now it's done in the
caller (check_disk_change()).  BLKRRPART handling also moved
out of drivers - they are still allowed to override it (DAC960
and i2o are the only remaining ones), but common case is handled
in fs/block_dev.c.

Note: we are still only shifting stuff - bd_sem deadlocks in
check_disk_change() are still there.  However, now we have all
relevant code outside of drivers and that will allow to fix the
thing (see next patches).

->attach() for ide subdrivers explicitly calls register_disk()
instead of ata_revalidate() now; revalidate_drives() is gone -
it's not needed anymore (we _know_ that we'll read partition
table as soon as driver claims the drive; no need to mess with
bogus rereading).

->major_name for per-disk gendisks set to full name - i.e.
IDE gendisks have "hda", "hdb", etc. instead of "hd".
As the result, we kill a lot of crap in check.c::disk_name().
In particular, now we can afford ->minor_shift set to 0
for ide-cd (disk_name() was the only obstacle)

check_disk_change() converted to passing struct block_device.

Old variant is still needed for a couple of places; wrapper
is provided (__check_disk_change(kdev)).  do_open() logics
with setting ->bd_op sanitized - now we do that before calling
->open().

fix for embarrassing braino in /proc/partitions - size in kilobytes
is _half_ the size in secotrs, not twice that size...

Present both in 2.4 and 2.5 ;-/

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

Cset exclude: torvalds@home.transmeta.com|ChangeSet|20020801011106|51286

we are starting to split gendisks - now we can do that.  Done for
ide, sd, pd, hd and mfm

It's in transit - what we are aiming at is getting ->nr_real to 1 for
all gendisks.  Once that will be done we will be able to simplify a lot
stuff and remove ad-hackery.  First thing that will happen after that
is death of ->nr_real, obviouslye.  Then we
	(a) will merge ->major and ->first_minor into ->dev
	(b) strip one level of indirection from  ->driverfs_dev_arr, ->de_arr
and ->flags - they turn into single-element arrays and we will simply pull
the (only) element into struct gendisk.  Kills a lot of ad-hackery in splitup
code (fewer things to allocate).
	(c) replace ->major_name with ->disk_name; kills most of the crap in
disk_name(9) - it only has to care about adding partition number to the name.

now that gendisks don't have shared stuff (we used to set blk_size[]
from ->sizes) we can start splitting them into per-disk ones.

Step 1:
  we introduce a new field - ->first_minor (to be merged with ->major
  into dev_t of entire disk once all gendisks are split).  All arrays
  are assumed to start at that minor (i.e.  gd->part[minor] got replaced
  with gd->part[minor - gd->first_minor], etc.).  get_gendisk() is
  taught to pick the right gendisk if there are several with the same
  major.

kills use of blk_size[] for partitioned devices, removes ->sizes from
struct gendisk.

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

This patch corrects a comment on the 8139cp ethernet driver.

This removes the TLS clear operation.  I've left the flags mask and the
writable flag just so that we have the option to introduce extensions
without breaking the ABI.

this is a small patch for boardergo.c linux driver for isdn HYSDN cards to
    1) remove call to check_region using request_region instead
    2) check the status of call to request_region
    3) release allocated region resource in case of error.

I don't have this hardware so compilation checked only.

from Debian's kernel package

[ Typo fix, makes sense, please apply ]

Symbols CONFIG_HISAX_ENTERNOW_PCI and CONFIG_HISAX_AMD7930 depend on
CONFIG_EXPERIMENTAL but do not say so in their banners.

Symbol CONFIG_PPPOATM doesn't depend on CONFIG_EXPERIMENTAL but claims
to in its banner.

Somebody noticed on #kernelnewbies. In the error path, so this is
silly cleanup work...

Some CML1 rule contributors seem to think that the "bool" statement
takes a third argument which is the default value.  It doesn't.

into osdl.org:/home/mochel/src/kernel/devel/linux-2.5-driverfs-api

I am not sure if you are the actual maintainer for this, but your name
adorns the source :
  2.5.28 introduced video mode 1400x1050 twice into drivers/video/modedb.c
Both instances use indentical timings, so I guess it's a mistake.

Symbol CONFIG_EXT3_FS doesn't depend on CONFIG_EXPERIMENTAL but claims
to in its banner.

Quick fix for:
  smbiod.c:272: warning: deprecated use of label at end of compound statement

this is a small patch for baycom_ser_hdx.c  -- baycom ser12 halfduplex radio modem driver to
    1) remove call to check_region using request_region instead
    2) check the status of call to request_region
    3) release allocated region resource in case of error.

I don't have this hardware so compilation checked only.

They are harmless mostly and can happen in normal use. (from -rh)

Silence bitop on non-long argument warnings.

To make spinlock debugging work with -funsigned-char the i386 version
of spin_is_locked() needs to cast to signed char explicitly instead of
just char.  XFS needed -funsigned-char (and currently still has it),
but it doesn't evert hurt.

Here are patches for designated initializers in kernel/*.

(Included in 2.4)

Silence bitop on non-long argument warnings.

[ Not just silence warnings, but fix portability bug ]