2.5.20 seems to be incapable of executing binaries in a ramdisk-based
root filesystem.  The ramdisk in question is an ext2fs, with a 1K
block size loaded via the compressed ramdisk loader in do_mounts().

It appears that, in the case of a 1K block sized filesystem, we attempt
to read two 512-byte sectors into a BIO vector.  The first one is copied
into the first 512 bytes.  The second sector, however, is copied over
the first 512 bytes.  Obviously not what we really want.

Rev. 2, slightly cleaned up:

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

Noted by Alexey Vyskubov

- Make sure proper pci id is passed to probe()
- make sure pci_dev->driver is set and reset on driver registration/unregistration
- call remove_driver to force unload of driver on unregistration

driver_unbind was called when drv->refcount == 0.
It would call driver_for_each_dev to do the unbinding
The first thing that would do was get_device, which...
BUG()'d if drv->refcount == 0. 
Duh. 

- make sure drv->devices is initialized on registration (from Peter Osterlund)
- add remove_driver for forcing removal of driver

There was a potential race with the module unload code. When a pci driver was unloaded, it would call pci_unregister_driver, which would simply call put_driver.
If the driver's refcount wasn't 0, it wouldn't unbind it from devices, but the module unload would still continue. 
If something tried to access the driver later (since everyone thinks its still there), Bad Things would happen. 
This fixes it until there can be tighter integration between the device model and module unload code.

Here's followup patch that makes it work. Notice freeze_processes() --
if you don't do that you risk data corruption.

This cleans up swsusp in 2.5.20. Killed sysrq-D support (it is too
much trouble to support suspending from interrupt), kill unused
define, fix compile-time warnings (thanks to Adam).

I created arch/i386/suspend.c not to clash with ACPI people so much in
future. (More stuff is going to move into it in the future, to clean
up functions that really do not belong to the headers.)

This patch merges in all the currently outstanding bluesmoke bits from
2.5-dj to 2.5.20, it also has the pleasant side effect of fixing the
compilation. Test compiled with and without MCE.

  Here's that patch again (MIME this time, so tabs don't get
  lost by my silly gui mailer); applies cleanly against against 2.4.19-pre8.
  Nobody commented on it last time I posted it, and it does
  make compiling gcc easier, so I guess that makes it trivial patch
  monkey fodder.  Or am I making a silly mistake?

  Most /proc/slabinfo cache_names are in the format:
  cache_name.  There are a couple with spaces in the
  name, which is inconsistent and requires a special case
  when scripting.

  Changes "fasync cache" and "file lock cache" to have
  the usual underscore.

  inactive_list and active_list are global, yet they are repeatedly
  initialized using INIT_LIST_HEAD() in free_area_init_core(). This
  patch is originally due to Christoph Hellwig, and by some reports
  has been implementated before in 2.4-based trees by Andrea Arcangeli.

  The memlist_* macros serve as nothing but an insulation layer from the
  Linux-native generic list operations. This patch removes them in favor
  of using generic list operations directly.

  This comment, describing how to optimize for gcc-2.2.2, is so outdated
  it should be removed. It's also quite doubtful it should ever have been
  placed in this file at all (perhaps something under Documentation/ ?).
  This patch removes it.

  memclass is too large to be a #define; it overflows 80 columns and does
  not make use of facilities available only to macros.

  This patch convert memclass() to be an inline function.

  I found this one while trying to straighten out bootstrap ordering
  issues elsewhere.

  There appears to be a duplicate declaration of rq in sched_init().
  This removes the nested declaration and otherwise leaves things alone.

  The comment describing the usage of zone_table[] assumes the existence
  of an unsigned char page->zone field from the original implementation
  of page->zone size reduction. This patch corrects the comment to
  accurately describe the lookup mechanism used by page_zone() and also
  to mention explicitly the sole user of the table, page_zone().

Playing with arch stuff does this to you.

Rusty Russell <rusty@rustcorp.com.au>: Oh, I feel so violated...:
  <sniff>

  This patch against 2.5.19 gets rid of some bogus casts in ide-cd.c
  In my opinion the casts as is are bugs waiting to happen.

  I found that 'max' pointer is not updated in proc_dointvec_minmax()
  and proc_doulongvec_minmax(), when I write smaller values than min to
  /proc/sys entry (and val<*min++ check becomes true.)
  This may lead to min/max checking of values with bogus maximum.

  Unrelated to my first dcache patch, this is something more crucial
  and should be applied first.

  fs/dcache.c:
   - handle d_alloc() returning NULL.

  Attached is a really trivial patch that changes an "unknown" PCI_DEVICE_ID
  0x3112 to PCI_DEVICE_ID_VIA_8361 in drivers/pci/quirks.c .

  It applies cleanly to 2.5.18 and 2.4.19-pre8.

  There is more of this janitorial work to come (eg General setup). I'm just
  piecemealing it

  [ Made applicable with -p1 by Rusty ]

  nlma fixes a call to netlink_broadcast with GFP_KERNEL ( passed to
  skb_clone ) while we are in_interrupt() ( catched by a BUG() in
  slab.c:1109 ).

  Missing include of asm_io.h in mm_bootmem.c:
  Submitted this trivial patch on May 14, but nothing has happened yet.
  Perhaps better chance if you took care of it.

  It's needed by phys_to_virt() but it happens to work on i386 etc.
  since dma.h includes io.h for that arch.

The following has been vetted with davem w.r.t. the change to
KM_SKB_DATA. Apologies for the bug...

include/asm-*/kmap_types.h:
   Replace the unused km_type slot KM_SKB_DATA with
   KM_SKB_SUNRPC_DATA.

net/sunrpc/xdr.c:
   Replace the use of KM_USER0 with KM_SKB_SUNRPC_DATA for copying
   data from an skb into the page cache when in the sk->data_ready()
   callback.

Fix queue plug locking.

This fixes two shift warnings on 64 bit archs.

  oom-loop fixes error handling after a netlink failure - it does not do a
  cleanup and it makes every next call to ip_fw_check to detect a
  loop and drop the packet.

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

Looks like sys_sysinfo has not been touched in years.  Among other
things, it uses a global cli() for protection; I switched it to an
existing rwlock.  I also pulled it out of info.c and stuck it in timer.c
(I choose timer.c because it shares dependencies there already).

The details:

        - move sys_sysinfo to kernel/timer.c from kernel/info.c:
          why one small syscall got its own file is beyond me.

        - delete kernel/info.c

        - stop the global cli!  now grab a read_lock on xtime_lock.
          this is safe as we moved the write_unlock on xtime_lock
          down one line to cover the calculating of avenrun.

        - trivial code cleanup

The attached patch cleans up some per-CPU code in arch/i386/kernel/smp.c
that could be problematic under preemption.

The first I solve with the new get_cpu interface, for the second two I
explicitly disable preemption.  I also changed 1 to 1UL in the shift to
properly match the type.

Might as well make it explicit...

Patch is against 2.5.20, please apply.

	Robert Love

Resend of trivial bits from my scheduler tree...:

        - shift cpu by 1UL not 1 to match type
        - clarify various comments
        - remove the barrier from preempt_schedule.  This was here
          because I used to check need_resched before returning from
          preempt_schedule but we do not now (although should).  The
          barrier insured need_resched and preempt_count were in sync
          now and after an interrupt that could occur.

I started looking into a couple FIXMEs in kernel/capability.c and I
ended up with a fairly largish patch (although not quite so many changes
to object code).

First, it is unsafe to touch task->cap_* while not holding
task_capability_lock.  The most notable occurrence of this is sys_access
which saves the current cap_* values, changes them, does its business,
then restores them.  In between all this they can change and then be
restored to old values.  Unfortunately we cannot just grab the lock here
since the function can sleep - I marked this with a FIXME for now.

Second, I formalized the locking rules with task_capability_lock.  I
declared the lock in include/linux/capability.h so other code can grab
it.

Finally, there is a whole boatload of code cleanup:

        - remove conditional locking/unlocking - that is just gross
        - don't pointlessly grab the read_lock twice
        - add/remove/edit comments
        - change some types (int -> pid_t, etc)
        - static inline two small functions that are called only
          once each
        - remove two FIXMEs
        - general code cleanup for readability and performance

TODO:

        - fix sys_access and other cap_* accesses
        - do something about the annoying oddball 5-space indentation
          in kernel/capability.c !!

Patch is against 2.5.20, please apply.

        Robert Love

This patch removes the whole wq_lock_t abstraction, forcing the behavior
to be that of a standard spinlock and changes all the wq_lock code in
the tree appropriately.

Removes lots of code - always a Good Thing to me.  New behavior is same
as previous behavior (USE_RW_WAIT_QUEUE_SPINLOCK unset).

 - Remove last parameter from ide_dump_status. This information is now
   permanently present in device->staus field, so there is not need to pass it
   around.

 - Patch for DVD read through ide-scsi. There is the possibility that we can get
   request structures passed down, which don't have the queue field set.
   At lest on the BIO code path this seems to be something worth further
   investigation. Found by Adam J. Richter. (Jens?)

 - Revert my change to the hostdata handling. I did get it wrong about the way
   host structures are allocated by the generic SCSI layer. It plays
   tricks there.

 - piix driver updates by Vojtech Pavlik.

 - We have a ata_out_regfile, so we should have ata_in_regfile too.

Fix namespace clash with proc stuff an compilation warnings.