pcmcia_get_{first,next}_region are tricky: they're used
only by ds.c, but to keep backwards compatibility proper
wrappers are needed (for the moment). However, match_region()
doesn't work without knowing about ds.c's handle, it seems...
but wait:

    while (list != NULL) {
        if (!(handle->Attributes & INFO_MTD_CLIENT) ||
            (strcmp(handle->dev_info, list->dev_info) == 0)) {
            *match = list->info;
            return CS_SUCCESS;
        }
        list = list->info.next;
    }

as ds.c's handle doesn't have INFO_MTD_CLIENT, the if always
succeeds -- allowing is to simplify it for ds.c. However, this
means we need special functions for ds.c. It's not too large,
fortunately.

Add a wrapper around pcmcia_access_configuration_register, and use
pccard_access_configuration_register in ds.c

Add a wrapper around pcmcia_get_status, and use pccard_get_status
in ds.c

pcmcia_reset_card doesn't need to know about the handle, but add a
wrapper for backwards compatibility anyways.

Add a wrapper around pcmcia_get_configuration_info, and
use pccard_get_configuration_info in ds.c

Change calling conventions to pcmcia_get_window, and use this
function directly in ds.c, but keep the existing wrappers
pcmcia_get_{first,next}_window in pcmcia_compat.c

Move the compatibility pcmcia_* functions which take a "handle" as
argument to a new file, pcmcia_compat.c, which is built into "ds"
a.k.a. "pcmcia.ko".  This makes sense as only 16-bit PCMCIA drivers
have a valid handle.

Add a wrapper around pcmcia_validate_cis, and use
pccard_validate_cis in ds.c

Rename the "internal" read_tuple to pccard_read_tuple, and
update it to better calling conventions.

Add a wrapper around pcmcia_parse_tuple, and use pccard_parse_tuple
in ds.c

Add a wrapping around pcmcia_get_tuple_data, and use
pccard_get_tuple_data wherever possible.

Add wrappings around pcmcia_get_{first,next}_tuple, and use the new
pccard_get_first,next_tuple calls wherever possible.

pcmcia_replace_cis doesn't need to know about the handle or a sub-
function, as the cis can only be replaced as a whole. Also, remove
bogus entries in cs_internal.h

pcmcia_adjust_resource_info is only called from ds.c and doesn't
need to know about a valid handle.

pcmcia_lookup_bus is only called from ds.c, and doesn't need to know
about a handle -- just about the struct pcmcia_socket.

After noting three things, namely
1.) CardBus cards work without ds a.k.a. pcmcia loaded,
2.) ds a.k.a pcmcia cannot be built as module if pcmcia_core is
    built in, and
3.) some commenting in drivers/pcmcia/Kconfig was obsolete
    [to use 32-bit cards, you don't need pcmcia-cs],
I wrote this patch which introduces more config options for fine-
grained tuning of what to built as what and what not to built. In
future, 16-bit-specific code in pcmcia_core may be surrounded by
CONFIG_PCMCIA. Also, I'll try to remove the dependency of
yenta_socket on cardbus.

Some parts of cs.c are not used by any PCMCIA socket or card driver
or the PCMCIA subsystem itself. Mark them CONFIG_PCMCIA_OBSOLETE.
Also, define pcmcia_get_window static as it was supposed to be.

Add a new CONFIG_PCMCIA_OBSOLETE option.

Remove both include/pcmcia/ftl.h and include/pcmcia/memory.h as they
are unused.

The rest of drivers/pcmcia/bulkmem.c is only used by code
relevant for 16-bit PCMCIA devices. So, link it with ds instead
of with cs. The newly created module pcmcia.ko contains a
MODULE_ALIAS() for the name "ds" so that backwards compatibility
is ensured.

Most of drivers/pcmcia/bulkmem.c is unused by the Linux kernel
PCMCIA subsystem and/or in-kernel PCMCIA device drivers. Remove
this unused code as well as references to it.

As Milton noticed, Anton actually broke the logic if the memory isn't
aligned in the first place.  Sorry about this mess for such a little
piece of code.  This _really_ fixes is it all
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

I found a couple of issues with reserve_mem:

- If we try and mem_reserve something of zero length, everything
  reserved after it would get ignored. This is because early_reserve_mem
  sees a zero length as a terminator.
- The code rounded the top down instead of up.
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

This patch adds proper ppc32 "iomap" interfaces.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

Nowadays, it's possible to build CONFIG_PPC_PMAC without CONFIG_PPC_PSERIES,
in which case, eeh will not be included in the build (and the eeh checks are
turned into no-ops). However, we then "lose" the iomap functions. This patch
moves them to a separate file.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

Fix bug identified by Badari Pulavarty <pbadari@us.ibm.com>

Local variable `handle' will become stale if ext3_direct_io_get_blocks()
closes off the current transaction and starts a new one.  This causes a BUG in
journal_stop().

So reacquire the handle from *current after performing the I/O.
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

Let's try the 2.4.x release methodology

into ppc970.osdl.org:/home/torvalds/v2.6/linux

Hoping you will accept this fix.  The bug can cause a crash upon hotplug
remove.  The bug involves unsafe traversal of a list while deleting list
members.  The fix uses list_for_each_safe() rather than
list_for_each().  Also threw in an initialization to get rid of a
compiler warning.
Signed-off-by: John Rose <johnrose@austin.ibm.com>
Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>

A bridge that has been set up by firmware to cover multiple PCI
buses but doesn't actually have anything connected behind some of
them caused us to use the incorrect maxmimum bus number span when
scanning the bridge chip.

Problem reported by Tim Saunders, with Russell King suggesting
the fix.

Make sure we order the writes to a newly created page
with the page table update that potentially exposes the
page to another CPU.

This is a no-op on any architecture where getting the
page table spinlock will already do the ordering (notably
x86), but other architectures can care.

Signed-off-by: Yoshinori Sato <ysato@users.sourceforge.jp>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

From: Lars Ellenberg <Lars.Ellenberg@linbit.com>

Add a memory barrier to the assembly checksum code - the code was copied
straight from the i386 one, and the patch resyncs the code with the
original.  I'll check if the original code can be included directly (i.e.
"#include") after 2.6.9.

Without this patch, every 2.6 UML release corrupts the checksum of every
UDP fragmented packet with size >= MTU (verified by various people, we all
agree on this issue; nobody reported "Works fine here").  The corrupted
packets are not accepted, thus blocking any kind of communication with
large-sized UDP packets.

In fact, I've even dissected the UML -> host traffic before and after this
patch with Ethereal - and it always reported an incorrect checksum for
fragmented UDP packets before and always correct after applying the patch.
Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade_spam@yahoo.it>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

Currently, ubd=sync is different from replacing ubd#= with ubd#s=.  This is
against Principle of Least Surprise, so remove this difference.

Also the current ubd=sync behaviour is completely useless: it is to make sure
that when the kernel has synched its I/O to the virtual disk, the host does
not invalidate this with his caching; this causes ReiserFS corruption.

But since actually we call end_request() only after the io_thread has done its
work, we never lie to the block layer.  Using O_SYNC as we do when replacing
ubd#= with ubd#s= is enough.
Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade_spam@yahoo.it>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

From: BlaisorBlade <blaisorblade_spam@yahoo.it>, Chris Wright <chrisw@osdl.org>

Avoid deadlocking onto the request lock in the UBD driver, i.e.  don't lock
the queue spinlock when called from the request function.

In detail:

Rename ubd_finish() to __ubd_finish() and remove ubd_io_lock from it.  Add
wrapper, ubd_finish(), which grabs lock before calling __ubd_finish().  Update
do_ubd_request to use the lock free __ubd_finish() to avoid deadlock.  Also,
apparently prepare_request is called with ubd_io_lock held, so remove locks
there.
Signed-off-by: Chris Wright <chrisw@osdl.org>
Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade_spam@yahoo.it>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

Some configuration options are known not to compile.  So then make them depend
on CONFIG_BROKEN.
Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade_spam@yahoo.it>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

Remove one more symlink when doing

make mrproper ARCH=um
Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade_spam@yahoo.it>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

Drop the usage of check_gcc and host-progs, and use their new names.  A
must-have :-).

Oh, and it will create lots of serious problems - it will give me your root
account!  Yes, you don't see the code in the patch, but it happens!  :-)))
Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade_spam@yahoo.it>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

Makes the UML build system work well even under parallel make (tested, so far,
even with -j50).  Please notice that it must be updated for every makefile
change.  Or better, every makefile change must use correct dependencies (and
they are easy to miss).
Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade_spam@yahoo.it>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>