Patch from Petr Baudis <pasky@ucw.cz>

This patch (against 2.5.49) updates Documentation/kernel-parameters.txt
to the current state of kernel.  It was somehow abadonded lately, so I
did my best, but it's possible that I still missed some of the options
- thus, if you will notice your favourite boot option missing there,
please speak up.  Note also that I will probably send up another update
after few further kernel releases..

Also, I attempted to introduce some uniform format to the entries, I
added the format description where I was able to find it out and
decypher it, and I also added gross amount of external links to the
headers of the source files or to the README-like files, where the
options are described into more degree.  This way, hopefully this file
has a chance to be actually usable for the users ;-).

There are almost certainly some entries which I missed, it was really a
huge number and the main reason is that some of the boot options don't
use the __setup macro, which I grep'd for.

I hope the patch is ok, there should be no problems with it. Please apply.

Note that this is the fourth submission of the patch - I took the
opportunity and updated the patch from 2.5.48 to 2.5.49.  AFAIK mutt
shouldn't mangle the patch in any way, so it should apply cleanly to
your tree, Linus.

Patch from Dipankar Sarma <dipankar@gamebox.net>

This is a trivial cleanup removing two old unused macros from
kernel_stat.h that made no sense with the new per-CPU kstat.
Also included a few finicky coding style changes. Please apply.

Patch from Ravikiran G Thirumalai <kiran@in.ibm.com>

Allows the kernel profiler to use a shift value of zero for
high-resolution profiling.

So instead of overloading a shift of zero to mean "not profiling", use
a separate flag for that.

This means that anyone who is currently using "profile=0" to disable
profiling has accidentally turned profiling on, so I added a printk.

- 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