From: Dominik Brodowski <linux@dominikbrodowski.de>

Use do_div on 32-bit archs in cpufreq_scale, and native "/" on 64-bit
archs.

From: Werner Almesberger <werner@almesberger.net>

When passing too many unrecognized boot command line options (which become
arguments or environment variables), the 2.6 kernel panics (unlike 2.4,
which just ignores the extra items).  Unfortunately, this happens before
the console is initialized, so all you get is a kernel that dies quickly,
for no apparent reason.

This is particularly irritating if using UML with
init=something wi th a lot of ar gu men t s

The patch below delays the panic until after console_init.

(akpm: I mainly added this in because we have other places where the
panic-later-on machinery is needed).

From: Adrian Bunk <bunk@fs.tum.de>

The patch below removes a kernel 2.2 #ifdef from fs/adfs/adfs.h .

Note that this #ifdef was only present in the header, the implementation
of adfs_bmap was already removed.

From: Ryan Boder <icanoop@bitwiser.org>

Explains how to compile external modules in
Documentation/kbuild/modules.txt.

From: Adrian Bunk <bunk@fs.tum.de>

The patch below removeskernel 2.2 #ifdef's from {i,}stallion.h .

From: Adrian Bunk <bunk@fs.tum.de>

The patch below removes two #ifdef's for kernel 2.0 from OSS.

From: Joe Korty <joe.korty@ccur.com>

Rename bitmap_snprintf() to bitmap_scnprintf() and cpumask_snprintf() to
cpumask_scnprintf(), as these functions now belong to the scnprintf family
of functions.

Andi notes that the

	smp_call_function(foo);
	foo();

in there is incorrect on preemptible kernels.

Fix that by using on_each_cpu(), which takes care of such things.

Also, remove the open-coded timer from here.  We have
schedule_delayed_work().

And remove the `timerset' variable, which doesn't do anything.

From: Andi Kleen <ak@suse.de>

For various reasons non fatal Machine Checks can happen on Athlons (e.g.
we have reports that laptops like to trigger them on suspend/resume)

They are not necessarily fatal and often only minor hardware glitches.

But what's annoying is that they're KERN_EMERG and pollute your console and
scare the user into writing confused kernel bug reports.

This patch just replaces the KERN_EMERGs with KERN_INFO for now.  Longer
term I think it would be better to log this stuff into a separate log.

From: "Maciej W. Rozycki" <macro@ds2.pg.gda.pl>

Fix up the 8259 ack handling for buggy SMM firmware.

See http://www.ussg.iu.edu/hypermail/linux/kernel/0203.2/0956.html

Apparently the embedded 8259A-compatible core is not fully functional.
This patch lets the I/O APIC-driven NMI watchdog to function correctly.
Credit to Ross Dickson for discovering this.

From: Joe Thornber <thornber@redhat.com>

I just noticed that bio_clone copies the BIO_SEG_VALID bit from the original
bio when it was set.  When we modify bi_idx or bi_vcnt afterwards the segment
counts are invalid and the bit must be dropped (though it is fairly unlikely
that it has already been set).  [Christophe Saout]

From: Joe Thornber <thornber@redhat.com>

Remove redundant spin lock in dec_pending()

From: Joe Thornber <thornber@redhat.com>

Add sanity check to dm_table_add_target() against zero length targets.
[Christophe Saout]

From: Joe Thornber <thornber@redhat.com>

For some reason dm_table_create() was allocating GFP_NOIO rather than
GFP_KERNEL.

From: Joe Thornber <thornber@redhat.com>

Tidy up the error path for alloc_dev()

From: Joe Thornber <thornber@redhat.com>

Make sure that we maintain ordering when deferring bios.

From: Joe Thornber <thornber@redhat.com>

Remove struct dm_deferred_io from dm.c.  [Christophe Saout]

From: Joe Thornber <thornber@redhat.com>

Move to_bytes() and to_sectors() into dm.h

From: Joe Thornber <thornber@redhat.com>

Export dm_vcalloc()

From: NeilBrown <neilb@cse.unsw.edu.au>

With this patch, md used two major numbers for arrays.

One Major is number 9 with name 'md' have unpartitioned md arrays, one per
minor number.

The other Major is allocated dynamically with name 'mdp' and had on array for
every 64 minors, allowing for upto 63 partitions.

The arrays under one major are completely separate from the arrays under the
other.

The preferred name for devices with the new major are of the form:

  /dev/md/d1p3  # partion 3 of device 1 - minor 67

When a paritioned md device is assembled, the partitions are not recognised
until after the whole-array device is opened again.  A future version of
mdadm will perform this open so that the need will be transparent.

From: NeilBrown <neilb@cse.unsw.edu.au>

Currently raid1 uses PAGE_SIZE read/write requests for resync, as it doesn't
know how to honour per-device restrictions.  This patch uses to bio_add_page
to honour those restrictions and ups the limit on request size to 64K.  This
has a measurable impact on rebuild speed (25M/s -> 60M/s)

From: NeilBrown <neilb@cse.unsw.edu.au>

For each resync request, we allocate a "r1_bio" which has a bio "master_bio"
attached that goes largely unused.  We also allocate a read_bio which is
used.  This patch removes the read_bio and just uses the master_bio instead.

This fixes a bug wherein bi_bdev of the master_bio wasn't being set, but was
being used.

We also introduce a new "sectors" field into the r1_bio as we can no-longer
rely in master_bio->bi_sectors.

From: NeilBrown <neilb@cse.unsw.edu.au>

next_r1 is never used, so it can just go.

read_bio isn't needed as we can easily use one of the pointers in the
write_bios array - write_bios[->read_disk].  So rename "write_bios" to "bios"
and store the pointer to the read bio in there.

From: NeilBrown <neilb@cse.unsw.edu.au>

The only time it is really needed is to differentiate a retry-on-fail from a
write-after-read-for-resync request to raid1d.  So we use a bit in 'state'
for that.

From: NeilBrown <neilb@cse.unsw.edu.au>

Instead of having a single end_request handler that must determine whether it
was a read or a write request, we have two separate handlers, which makes
each of them easier to follow.

From: NeilBrown <neilb@cse.unsw.edu.au>

The "START_ARRAY" ioctl depends on major/minor numbers (as stored in the raid
superblock) are stable over reboots, which is increasingly untrue.

There are better ways to start an array (e.g.  with mdadm) so we mark the
ioctl as deprecated for 2.6, and will remove it in 2.7.

From: NeilBrown <neilb@cse.unsw.edu.au>

From: Stephen Hemminger <shemminger@osdl.org>
Date: Fri, 12 Sep 2003 11:31:06 -0700

NFS won't build w/o CONFIG_PROC_FS.  Looks like typo's (or a C++
programmer) in stats.h

From: NeilBrown <neilb@cse.unsw.edu.au>

From: shemminger@osdl.org Sat Sep  6 09:19:50 2003
Date: Fri, 5 Sep 2003 16:19:30 -0700

Converts /proc/net/rpc/nfs and /proc/net/rpc/nfsd to use the simpler
seq_file interface.

From: NeilBrown <neilb@cse.unsw.edu.au>

There is no way to return an error from a cache init routine, so instead we
make sure to pre-allocate the memory needed, and free it after the lookup
if the lookup failed.

From: NeilBrown <neilb@cse.unsw.edu.au>

When adding a item to a sunrpc/svc cache that contains kmalloced data it is
usefully to move the malloced data out of the key object into the new cache
object rather than copying (as then we would need to cope with kmalloc
failure and such).  This means modifying the original.

If the kmalloced data forms part of the key, then we must not move the data
out until after the key isn't needed any more.  So this patch moves the
call to "INIT" on a new item (which fills in the key) to *after* the item
has been found (or not), and also makes sure we only call the HASH function
once.

Thanks to "J.  Bruce Fields" <bfields@fieldses.org>

also

 1/ remove unnecessary assignment
 2/ fix comments that lag behind implementation.

From: NeilBrown <neilb@cse.unsw.edu.au>

We currently call cache_put, which can schedule(), under a spin_lock.  This
patch moves that call outside the spinlock.

From: Valdis.Kletnieks@vt.edu

15 changes of #if to #ifdef and 2 places CONFIG_FOO should be
defined(CONFIG_FOO).  This gets rid of spurious warnings if you build with
"-Wundef" so you get a warning if you have a preprocessor command like:

#if CONFIG_ETRAX_DS1302_RSTBIT == 27

and you'll be told if it's substituting a zero rather than silent
weirdness and unexpected code generation.

From: Ralf Baechle <ralf@linux-mips.org>

Three new MIPS-specific serial drivers.  ip22.c is derived from the sparc
zilog driver; guess we should write a generic Zilog driver somewhen ...

From: Andi Kleen <ak@muc.de>

Some x86-64 users were complaining that coredumps >2GB don't work.

This will enable large coredump for everybody.  Apparently the 32bit
gdb/binutils cannot handle them, but I hear the binutils people are working
on fixing that.  I doubt it will harm people - unreadable coredumps are not
worse than no coredump and it won't make any difference in space usage if
you get a 1.99GB or a 2.5GB coredump.  So just enable it unconditionally.
If it should be really a problem for 32bit the rlimit defaults in
resource.h could be changed.

For file systems that don't support O_LARGEFILE you should just get an
truncated coredumps for big address spaces.

From: Andrey Borzenkov <arvidjaar@mail.ru>

- use struct nameidata in devfs_d_revalidate_wait to detect when it is
  called without i_sem hold; take i_sem on parent in this case.  This
  prevents both deadlock with devfs_lookup by allowing it to drop i_sem
  consistently and oops in d_instantiate by ensuring that it always runs
  protected

- remove dead code that deals with major number allocation.  The only
  remaining user was devfs itself and patch changes it to

- use register_chardev to get device number for internal /dev/.devfsd and
  /dev/.statd.

- remove dead auto allocation flag as well

- remove code that does module get on dev open - it is handled by fops_get.
   Use init_special_inode consistently

- get rid of struct cdev_type and bdev_type - both have just single dev_t
  now

From: Juergen Quade <quade@hsnr.de>

Lots of places in the kernel are using [v]snprintf wrongly: they assume it
returns the number of characters copied.  It doesn't.  It returns the
number of characters which _would_ have been copied had the buffer not been
filled up.

So create new functions vscnprintf() and scnprintf() which have the
expected (sane) semaptics, and migrate callers over to using them.

We need to hold i_sem while running i_size_write().  But that seems like a
lot of fuss and deadlock potential.  So just write the dang thing.

The NGROUPS changes broke it, and we're not sure how to fixit, and nobody
appears to be working on or testing intermezzo.

From: Tim Hockin <thockin@sun.com>,
      Neil Brown <neilb@cse.unsw.edu.au>,
      me

New groups infrastructure.  task->groups and task->ngroups are replaced by
task->group_info.  Group)info is a refcounted, dynamic struct with an array
of pages.  This allows for large numbers of groups.  The current limit of
32 groups has been raised to 64k groups.  It can be raised more by changing
the NGROUPS_MAX constant in limits.h

From: Rusty Russell <rusty@rustcorp.com.au>

Jeff Garzik disliked the bonding driver knowing it was called "bond0".
Remove that alias, and revert documentation.