few unimportant floating point instructions (i287 instructions that
are No-Ops on the i387, so "emulating" them is easy :^) and fixes a
silly bug when mmap'ing stuff write-only.  It also fixes a buggy lock
in the networking.

sbpcd (Sound Blaster Pro CD interface) driver.

Andries Brouwer cleans up and re-does keyboard driver diacritical handling.

Lots of new sound drivers.

Sysvfs added (Xenix, SystemV/386 and Coherent support).  Linux was
starting to have a lot of users move over..

MAP_ANONYMOUS flag added to mmap().

Loadable modules added.

Alan Cox is active in networking.

[original changelog below]

Linux 0.99.15 released: Codefreeze for 1.0

People who look into my directory on ftp.funet.fi will already have
noticed that the latest version of linux (0.99.15) is available, and I
assume it will be available on most other linux sites soon.  As
explained in a previous announcement, 0.99.15 is "it", in that this will
be the base for 1.0 after about a month of testing.  No further patches
are accepted until the 1.0 release, unless they obviously fix a serious
bug.

**** NOTE 1 ****

  For this code-freeze to be effective yet still potential bugs be
  found, testing is needed, along with good reports of errors and
  problems.  Thus, nobody should think "hey, the *real* release will be
  out in a month, let's wait for that", but instead think: "hey, I'd
  better test this one, so that the *real* release won't result in any
  ugly surprises for me".

  In short: test it out, preferably even more than you usually do.  Run
  "crashme" for the whole month if you have the CPU-power to spare,
  and/or just misuse your machine as badly as you can.  And if there are
  problems, report them to me (and the better the report, the more
  likely I am to be able to do something about it).

**** NOTE 2 ****

  Bumping the linux version number to 1.0 doesn't mean anything more
  than that: it's only a version number change.  More explicitly, it
  does *NOT* mean that linux will become commercial (the copyright will
  remain as-is), nor does it mean that development stops here, and that
  1.0 will be anything special in that respect.

  I'm also afraid that just changing the version number will not make
  potential bugs magically disappear: this has been amply proven by
  various software houses over the years.  This code-freeze is there in
  order to avoid most of the problems that people sometimes associate
  with "X.0 releases", and I hope that it will mean that we have a
  reasonably stable release that we can call 1.0 and one that I won't
  have to be ashamed of.

  Ok, enough said, I hope.  The pl15 release is hopefully good, but I'll
  continue to make ALPHA patches against it along the whole month as
  problems crop up.  The networking code has been much maligned, and is
  not perfect by far yet, but it's getting its act together thanks to
  various developers and testers.  And as wiser men than I have said (or
  if they haven't, they should have):

      "There is life after 1.0"

  Any rumors that the world is coming to an end just because I'm about to
  release a 1.0-version are greatly exaggerated.  I think.

                    Linus

----------
Things that remained the same between 0.99.14 and 0.99.15:

- I again forgot to update the README before uploading the release.  In
  pl14, I talked about pl13, while the all new and improved README has
  now caught up with pl14.  Remind me to buy a new brain one of these
  days.

Changes between versions 0.99.14 and 0.99.15:

 - improved Pentium detection.  Some of you may have had linux report
   your 4086DX2 as a pentium machine, but the new kernel will tell you
   the sad truth.  Whee.
 - Network driver updates by Donald Becker.  New drivers added, old ones
   updated.
 - FPU emulation updates by Bill Metzenthen.  Various minor errors and
   misfeatures fixed (mostly error handling).
 - Support for the SoubdBlaster Pro CD-ROM driver added by Eberhard
   Moenkeberg.
 - extended support for keyboard re-definition, along with font
   re-programming (Eugene Crosser, Andries Brouwer et al).
 - tty handling fixes: true canonical mode with most features supported
   by Julian Cowley.  This may make your canonical mode behave funnily
   if you happen to use old and broken programs that happened to work
   with the old and broken behaviour (this includes at least some
   'getty' programs).
 - serial driver changes and tty fixes by Theodore Ts'o.
 - SCSI fixes by Drew Eckhardt, Eric Youngdale, Rik Faith, Kai Mdkisara
   et al.
 - Updated sound card driver to version 2.4 (Hannu Savolainen)
 - COFF binary loading support (but you will still need the experimental
   iBCS2 patches to run non-linux i386 COFF binaries) by Al Longyear.
 - Upgraded ext2fs filesystem routines (0.4a -> 0.4b), with new
   features.  Read the fs/ext2/CHANGES file for details.  Remy Card and
   Stephen Tweedie.  Get a new fsck that knows about the new features.
 - pipe behaviour fixed in the presense of multiple writers (now
   actually conforms to POSIX specs about atomic writes).  Much of the
   code by Florian Coosmann.
 - minix filesystem extended to support the clean flag: get a new fsck
   that knows about it.
 - System V filesystem (support for Xenix, Coherent and SysV
   filesystems) by Doug Evans, Paul Monday, Pascal Haible and Bruno
   Haible.
 - loadable modules (various authors, don't remember original author of
   the "modules" code).
 - Lots of networking fixes by various people: Alan Cox, Charles
   Hedrick, me and various other people.  Non-byte-aligned networks
   work, and the networking code should be much stabler in general.

 + various bugfixes and enhacements here and there (mcd driver update by
   Jon Tombs, atixlmouse fix by Chris Colohan, /dev/full by XXX etc etc)

All in all, the patches come out to 1.5MB uncompressed (about 400kB
gzip-9'd), so there is little or no idea to make patches to plain pl14
available.  Incremental patches and ALPHA-releases can be found on
ftp.funet.fi: pub/OS/Linux/PEOPLE/Linus/ALPHA-pl14.

hopefully make linux 1.0 a reality.  The plan has been discussed a bit
with various developers already, and is already late, but is still in
effect otherwise.

In short, the next version of linux (0.99.15) will be a "full-featured"
release, and only obvious bug-fixes to existing features will be applied
before calling it 1.0.  If this means that your favourite feature or
networking version won't make it, don't despair: there is life even
after beta (and it's probably not worth mailing me about it any more:
I've seen quite a few favourite features already ;-).

In fact, 1.0 has little "real meaning", as far as development goes, but
should be taken as an indication that it can be used for real work
(which has been true for some time, depending on your definition of
"real work").  Development won't stop or even slow down: some of it has
even been shelved pending a 1.0 already.

Calling it 1.0 will not necessarily make all bugs go away (quite the
opposite, judging by some other programs), but I hope it will be a
reasonably stable release.  In order to accomplish this, the code-freeze
after 0.99.15 will be about a month, and I hope people will test out
that kernel heavily, instead of waiting for "the real release" so that
any potential bugs can be found and fixed.

As to where we are now: as of this moment, the latest release is the 'r'
version of pl14 (aka "ALPHA-pl14r").  I've made ALPHA releases available
on ftp.funet.fi almost daily, and expect a final pl15 within a few more
days.  Testing out the ALPHA releases is not discouraged either if you
like recompiling kernels every day or two..

And finally: we also try to create a "credits" file that mentions the
developers of the kernel and essential linux utilities.  The credit file
compilator is jmartin@opus.starlab.csc.com (John A. Martin), and if you
feel you have cause to be mentioned in it, please contact him.

            Linus

Original Changelog:

CHANGES since 0.99 patchlevel 13:

 - new kernel source layout: drivers separated
 - lots of networking bugs fixed, and new network card drivers (Alan Cox,
   Donald Becker &co)
 - sound driver added to the default source distribution (Hannu
   Savolainen)
 - updated SCSI driver code (Eric Youngdale, Drew Eckhardt &co)
 - readonly OS/2 filesystem support (HPFS) added (Chris Smith)
 - NTP support (Philip Gladstone, Torsten Duwe, ??)
 - fixed 16MB swap-area limit
 - lots of minor cleanups, buxfixes etc.

We get enable_irq()/disable_irq()

The C++ experiment is not going well.  Get rid of the 'extern "C"', but
replace it with an "asmlinkage" #define that allows us to experiment.

ELF binary support it a notable change.

Original ChangeLog:

 - the bad memory management one-liner bug in pl12 is naturally fixed.
 - compiled with plain C by default instead of C++
 - ELF binary support (Eric Youngdale)
 - Quickport mouse support (and some changes to the PS/2 mouse driver)
   by Johan Myreen and co)
 - core file name change ("core" -> "core.xxxx" where xxxx is the name
   of the program that dumped code).  Idea from ???.  Also, core-files
   now correctly truncate any existing core file before being written.
 - some mmap() fixes: better error returns, and handling of non-fixed
   maps for /dev/mem etc.
 - one kludgy way to fix the wrong arp packets that have plagued net-2d
   (resulting in arp packets that had the first four bytes of the
   ethernet address as the IP address).
 - I fixed the mount-point handling of 'rename()' and 'unlink()/rmdir()'
   so that they should now work and/or give appropriate error messages.
   An early version of this patch was already sent to the KERNEL
   channel, which fixed the rename problem but not a similar bug with
   unlink.
 - packet mode fixes by Charles Hedrick.  Sadly, these are likely to
   break old telnet/rlogin binaries, but it had to be done in order to
   communicate correctly with the rest of the world.
 - FPU emulator patches from Bill Metzenthen.  The fprem1 insn should be
   correct now (not that anybody seems to have seen the incorrect
   behaviour..)
 - a few fixes for SCSI (Drew and Eric)
 - signal.c changes to handle multiple segments (for Wine) correctly.
 - updated drivers from Donald Becker: 3c509 and AT1500 drivers, but
   also some other drivers have been edited, and some networking fixes.

I hate to put out patches this soon after a release, but there is one
potentially major problem in pl12 which is very simple to fix..  I'm
including patches: both in plain ascii and as a uuencoded gzip file
(it's the same patch - the uuencoded one is in case there is any
newsserver that messes up whitespace).

The main patch is just the change from __get_free_page(GFP_BUFFER) into
get_free_page(GFP_KERNEL), and the two minor patches just add checks
that actually enforce the read-only nature of current file mmap'ings so
that any program that tries to do a write mapping at least will be told
that it won't work.

I'd suggest anybody compiling pl12 should add at least the file_table.c
patch: thanks to Alexandre Julliard for noticing this one.

            Linus

CDU31A and MCD CD-ROM drivers.  Ahh, the bad old days of every sound
card manufacturer having their own CD interface.

Much nicer keymaps for keyboards.

Many more network drivers by Donald Becker for the improving NET-2 code.

Eric Youngdale makes executables and libraries use the new mmap()
functionality.  The old special-cased sharing goes away.  Hurray! This
also means that mmap gets a lot more testing.  It also means that NFS
has to be fixed to allow mmaps. Done.

"sys_modify_ldt()" appears, the extended DOS emulators want it.

Still using C++ to compile the kernel.

Original changelog:

 - The memory manager cleanup has continued, and seems to be mostly
   ready, as proven by the ease of adding mmap() over NFS with the new
   routines.  So yes, the pl12 kernel will demand-load your binaries
   over NFS, sharing code and clean data, as well as running shared
   libraries over NFS.  Memory management by Eric and me, while the NFS
   mmap code was written by Jon Tombs,

 - ** IMPORTANT **: The keyboard driver has been enhanced even further,
   and almost everything is completely re-mappable.  This means that
   there is a new version of 'loadkeys' and 'dumpkeys' that you must use
   with this kernel or you'll have problems.  The default keyboard is
   still the US mapping, but if you want to create your own mappings
   you'll have to load them with the new binaries.  Get the 'kbd.tar.gz'
   archive from the same place you get the kernel.

   The new keymappings allow things like function key string changes,
   remapping of the control keys, and freedom to remap any of the normal
   keyboard functions: including special features like rebooting,
   console switching etc.  The keyboard remapping code has been done
   mostly by Risto Kankkunen (Risto.Kankkunen@Helsinki.FI).

 - updated network drivers by Donald Becker

 - updated serial drivers - tytso@Athena.mit.edu

 - updated 387 emulation (Bill Metzenthen).  The updated emulator code
   has more exact trigonometric functions and improved exception
   handling.  It now behaves very much like a real 486, with only small
   changes (greater accuracy, slightly different denormal NaN handling
   etc - hard to detect the differences even if you are looking for
   them).

 - network timer fixes by Florian La Roche (much cleaned up net/inet/timer.c
   and some bad race-conditions fixed).

 - Scsi code updates by Eric Youngdale and others

 - Sony CDU-31A CDROM driver by Corey Minyard added to the standard
   kernel distribution.

 - The Mitsumi CDROM driver is now part of the standard kernel.  Driver
   by Martin Harriss with patches by stud11@cc4.kuleuven.ac.be (yes, he
   probably has a real name, but no, I haven't found it) and Jon Tombs.

 - various other minor patches (preliminary ldt support etc)

There is at least one known problem with 0.99pl11 - it's very minor and
will not lead to any real problems, but it's also very easy to fix,
so...

The problem is a one-liner oversight in kernel/fork.c (thanks to TjL for
noticing the symptoms - they aren't easy to see), which is fixed by the
following patch:

In fact, it's probably easiest to "apply" this patch by hand: just
change the "p->tss.fs = KERNEL_DS" in fork.c to "p->tss.fs = USER_DS"
and you should be fine.

            Linus

Real file mmap with page sharing in the VM code.  We don't do writable
shared mappings (and we won't do them for a _long_ time yet), but this
is a big step forward!

Note in the COPYING file that the GPL only covers the kernel, not user
programs. People were starting to find Linux more and more interesting..

Improved configure script.

Use nicer "save_flags()/cli()/restore_flags()" macros instead of
hardcoding the inline assembly.  Clean up other inline assembly usage
too.

Trying to compile the kernel with C++ compiler.  It will be a failed
experiment.

Original ChangeLog:

 - The keyboard is dynamically changeable (this is true of pl10 as
   well), and you need to get the "keytables.tar.z" archive to set the
   keyboard to suit your taske unless you want to live with the default
   US keymaps.

   Use the "loadkeys map/xxx.map" command to load the keyboard map: you
   can edit the maps to suit yourself if you can't find a suitable one.
   The syntax of the keyboard maps should be obvious after looking at
   the examples.

 - The memory manager has been cleaned up substantially, and mmap()
   works for MAP_PRIVATE.  MAP_SHARED is still not supported for
   anything else than /dev/mem, but even so it actually is usable for a
   lot of applications.  The shared library routines have been rewritten
   to use mmap() instead of the old hardcoded behaviour.

 - The kernel is now compiled with C++ instead of plain C.  Very few
   actual C++ features are used, but even so C++ allows for more
   type-checking and type-safe linkage.

 - The filesystem routines have been cleaned up for multiple block
   sizes.  None of the filesystems use it yet, but people are working on
   it.

 - named pipes and normal pipes should hopefully have the right select()
   semantics in the presense/absense of writers.

 - QIC-02 tape driver by Hennus Bergman

 - selection patches in the default kernel

 - fixed a bug in the pty code which led to busy waiting in some
   circumstances instead of sleeping.

 - Compressed SLIP support (Charles Hedrick). See net/inet/CONFIG

 - the 'clear_bit()' function was changed to return the previous setting
   of the bit instead of the old "error-code".  This makes use of the
   bit operations more logical.

 - udelay() function for short delays (busy-waiting) added.  Used
   currently only by the QIC driver.

 - fork() and sheduler changes to make task switches happen only from
   kernel mode to kernel mode.  Cleaner and more portable than the old
   code which counted on being able to task-switch directly into user
   mode.

 - debugging malloc code.