The prototype name is wrong, not the name called by the actual
implementation.  Noticed by David Miller.

Forgot to export it to modules :/

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 ;-/

- inline grab_cache_page() in pagemap.h, it's just a simple wrapper
  around find_or_create_page()
- rename (__)remove_inode_page to (__)remove_from_page_cache and
  move them from mm.h and swap.h to pagemap.h because they reverse
  add_to_page_cache and that's where they belong.

- __down_[read,write]_trylock, __downgrade_write implemented;
- __builtin_expect replaced with unlikely().

Set of small fixes:
- pcibios_init() must be int;
- fls() - ctlz on ev67, generic on others. This was required for
  something several kernel releases back, now it seems to be unused.
  Anyway, it shouldn't hurt, so included here.
- missing #includes, missing #if RTC_IRQ in drivers/char/rtc.c;
- define USER_HZ;
From Jeff Wiedemeier:
- rename alpha-specific config section 'General setup' to 'System setup'
  to avoid confusion with generic 'General setup';
- fix the 'bootpfile' build.

- osf_getrusage() updated for new utime/stime fields of the task_struct;
- compatibility wrappers for OSF/1 v4 readv/writev syscalls:
  forward port from 2.4.19.

Generic per-cpu areas; wrappers for SMP boot process.

This one is large mostly because of massive code deletion.
- cli, sti an so on go away;
- irq_smp.c goes to /dev/null; the only leftover (synchronize_irq)
  moved to irq.c;
- hardirq count field in the preemption counter extended to 12 bits -
  one more than required for wildfire.

From Jay Estabrook:
CIA rev 1 can't use DAC and windows 1,2 for SG.

Historically, assembly routines included libc header <alpha/regdef.h>
for OSF/1 register names. With the new kernel build system
it doesn't work anymore. Make our own copy in <include/asm>.

Hardware cpu_id to logical cpu mapping is gone.
Converted to cpu_online() etc.

- send_ipi_message() fix from Jeff Wiedemeier:
  The 2.5.30 IPI algorithm (with the to_whom == set test) incorrectly sends
  IPI messages to CPU 0 in a SMP system running with one processor. In this
  case to_whom is often 0 (cpu_present_mask & ~1UL << smp_processor_id()) which
  ends up triggering the to_whom == set case.
- migration IPI removed;

This starts a large set of alpha patches accumulated since 2.5.18 or
even earlier. All of this was reasonably well tested.
Thanks to Jeff Wiedemeier for SMP testing and fixes.

- sync up with (2.5.18?) pte/pfn/page/tlb etc. macros;
- asm-generic/tlb.h: loading unsigned long constant to unsigned int
  tlb->nr causes compiler warnings on 64 bit platforms.

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

- Treat BUG_ON() as ASSERT() not VERIFY(), i.e. do not use side effects
  inside BUG_ON(). (Adam J. Richter)
- Split logical OR expressions inside BUG_ON() into individual BUG_ON()
  calls for improved debugging. (Adam J. Richter)
- Add errors flag to the ntfs volume state, accessed via
  NVol{,Set,Clear}Errors(vol).
- Do not allow read-write remounts of read-only volumes with errors.
- Clarify comment for ntfs file operation sendfile which was added by
  Christoph Hellwig a while ago (just using generic_file_sendfile())
  to say that ntfs ->sendfile is only used for the case where the
  source data is on the ntfs partition and the destination is
  somewhere else, i.e. nothing we need to concern ourselves with.

  fix __FUNCTION__ usage, since its use as string literals is deprecated now.

into angband.namesys.com:/home/green/bk_work/reiser3-linux-2.5

 - trivial: cache file->f_dentry->d_inode; saves a few bytes of compiled
   size.
 - move expand_stack inside ARCH_STACK_GROWSUP, add an alternate
   implementation for PA-RISC.
 - partially fix the comment (mmap_sem is held for READ, not for WRITE).
   It still doesn't make sense, saying we don't need to take the spinlock
   right before we take it.  I expect one of the vm hackers will know
   what the right thing is.

Testing of course revealed some bugs introduced during the cleanups,
so these are fixed here with a couple of other small bits, like improved
debugging code.

into angband.namesys.com:/home/green/bk_work/reiser3-linux-2.5

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

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