Teach usb/storage/sddr09.c how to return less than a full page of sense
data.

In sd.c we call MODE SENSE (6) in order to find out whether the
device is write protected. The info we need is in byte 2, the
header of the MODE SENSE answer, but in the request we have to
specify (i) what page(s) we want, and (ii) how many bytes we want.

Long ago we asked for 12 bytes from page 1 (Daniel Roche, 1.3.35).
Matthew Dharm made this 8 bytes from page 3F (all pages), patch-2.4.0-test8.
In patch-2.4.10 the 8 was increased to 255.

I found on the one hand devices that only react to page 0
(the vendor page), and return an error for page 3F.
And on the other hand devices that are unable to handle requests
for more bytes than they actually have.

So, it seems that the cautious way to ask for MODE SENSE data is
to first ask for the header only, see how much is available,
and then ask for everything.

The patch below first separates out the MODE SENSE call,
and then tries it three times: on all pages (3F), only the first
four bytes; on the vendor page (0), only the first four bytes;
on all pages (3F), 255 bytes.

This should be at least as robust as our current code.
I tried it on 8 SCSI devices (of which 2 fail under 2.5.33)
and found no problems.

A patch from Martin Bligh which cleans up the open-coded uses of
mem_map for ia32.  Basically it replaces

mem_map + pagenr

with

pfn_to_page(pagenr)

in lots of places.  Because mem_map[] doesn't work like that with
discontigmem.

It also fixes a bug in bad_range, that happens to work for contig mem
systems, but is incorrect.  Tested both with and without discontigmem
support.

 - All the support macros which assume a linear mem_map[] have been
   wrapped in !CONFIG_DISCONTIGMEM.  pfn_to_page, page_to_pfn,
   page_to_phys, pmd_page, kern_addr_valid.

 - Move some initialsation macros into setup.h so they can be used in
   the i386 discontig.c (INITRD_START, INITRD_SIZE).

 - Alternate version of the bootmem allocator

 - add i386 discontig support and numaq support.

 - Pull the middle out of one_highpage_init() so that the i386 NUMA
   patch can call it on a per-page basis.

 - Move a few lines out of mem_init() into the new
   set_max_mapnr_init(), which the i386 NUMA code requires.

This restructures setup_arch() for i386 to make it easier to include the
i386 numa changes (for CONFIG_DISCONTIGMEM) I've been working on.  It
also makes setup_arch() easier to read.  A version of this patch is the
in 2.4 aa tree.

This does not depend on the other patches I'm submitting today, but my
discontigmem patch does depend on this one.

I've tested this patch on the following configurations: UP, SMP, SMP
PAE, multiquad, multiquad PAE.

I've had ia32-discontigmem under test for a month, uneventfully.  Possibly
because I don't have a machine to test it on....

A major part of this work is a general move to convert the low-level
memory management to consistently use pageframe numbers.  It's a bit
schizo at present..

This patch was written by Martin Bligh.  A version of this patch is in
the 2.4 aa tree.

It changes the unsigned longs node_start_paddr and zone_start_paddr to
page frame numbers.  This is necessary because a PAE address is 36 bits
and cannot be represented in an unsigned long.

 - The per-node physical memory start address node_start_paddr becomes
   a pfn, node_start_pfn.

 - The per-zone physical memory start address zone_start_paddr becomes
   a pfn, zone_start_pfn.

 - free_area_init_node() takes a pfn rather than a physical address.

Patricia has tested this patch on the following configurations: UP,
SMP, SMP PAE, multiquad, multiquad PAE, multiquad DISCONTIGMEM,
multiquad DISCONTIGMEM PAE.

The rmap locking inlines are causing some header file
dependency/ordering problems - move them out of page-flags.h and into
their own header file.

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

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

This adds IBM thinkpads to a list of mainboards that should not be
scanned by i2c sensors during detection phase.

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

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

OK, Linus, you are right... there are enough instances of this we are
not going to find them all (although I suspect Andrew's slab.c fixes
will cover most of the cases).  Further, I think we can should actually
purposely call preempt_schedule() in certain cases after interrupt
reenable to check for reschedules...

Let's just make it a rule "no preemption if interrupts are off" and
enforce that.

This fixes various instances of the interrupt flag variable not being
the proper `unsigned long', most notably kernel/softirq.c ...

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

This is a cleanup of the sigio/sigurg code.

Summary:
  o Removed sk->proc, SIGURG now sent via vfs, credentials checked
    during delivery.
  o SIOCSPGRP etc. ioctls use vfs, and work now for SIGIO as well
    as SIGURG.
  o Removed socket fcntl code.
  o Consolidate lsm file_set_fowner() hooks.
  o Fixed fowner race.
  o Fixed associated mainline memory leak in fcntl_dirnotify().

Kill duplicate declaration of pci_lock

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

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

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

contortions instead of just calling "end_that_request_first()" with
the proper sector count.

This was _bad_. Major floppy corruption, and possibly the reason
for other block device corruption for any driver that generated
partial results for a block device request.

ptrace.h needs struct task_struct, so we need to include <linux/sched.h>.

Christoph Hellwig:

bools don't have depencies, only dep_bools do.  Use three-space indents.

Fix various Makefiles to really list the objects which use EXPORT_SYMBOL.

Patch by "Lightweight Patch Manager".

#define __NO_VERSION__ has been unnecessary for a long time, so here it
goes...

(Rusty Russell)

(by Rusty Russell)

Based on work done by Solar Designer for 2.2

Defining CONFIG_DEVFS_FS in two different places does not work correctly.
Nobody objected on linux-ia64, so I just removed the statements
unconditionally enabling devfs on IA64/SNI.

Pointed out by Greg Banks.