- Missing parentheses around macro arg in __pte_offest()

- struct page_state needs to be cacheline aligned (the first seven
  fields should be in the same cacheline)

blk_run_queues() places queues onto a local list without locking.  But
interrupt-time activity in scsi_lib.c will replug these queues, which
involves accessing that list which blk_run_queues() is walking.

Net effect: list corruption and an oops.  Very hard to reproduce...

So hold the lock while blk_run_queues() is walking the local list.

The patch was acked by Jens.  It also uninlines a few largeish
functions and adds a couple of WARN_ON()s in code which worried me.

Cset exclude: davej@codemonkey.org.uk|ChangeSet|20021126023731|33210

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

Cset exclude: alan@lxorguk.ukuu.org.uk|ChangeSet|20021126021252|43411

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

into samba.org:/home/paulus/kernel/for-linus-ppc

Otherwise a UDMA CD-ROM is correctly set up and then panics the kernel 8(
The UDMA rule is on disks not on CD

into tetrachloride.(none):/home/davej/src/watchdog

More fall-out from the -ac merge.

do_ide_setup_pci_device() is returning an uninitialised
ata_index_t causing an oops at bootup.

into nuts.ninka.net:/home/davem/src/BK/sparc-2.5

him either. Tssk, tssk.

From 2.4

Makes the code simpler..

from 2.4

As per CodingStyle