Merge branch 'legacy-isa-delete' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux

Paul Gortmaker says:

====================
The Ethernet-HowTo was maintained for roughly 10 years, from 1993 to 2003.
Fortunately sane hardware probing and auto detection (via PCI and ISA/PnP)
largely made the document a relic of the past, hence it being abandoned
a decade ago.

However, there is one last useful thing that we can extract from the
effort made in maintaining that document.  We can use it to guide us
with respect to what rare, experimental and/or super ancient 10Mbit
ISA drivers don't make sense to maintain in-tree anymore.

Nobody will argue that ISA is obsolete.  Availability went away at about
the time Pentium3 motherboards moved from 500MHz Slot1/SECC processors
to the green 500MHz Socket 370 Pentium3 chips, at the turn of the century.

In theory, it is possible that someone could still be running one of these
12+ year old P3 machines and want 3.9+ bleeding edge kernels (but unlikely).
In light of the above (remote) possibility, we can defer the removal of some
ISA network drivers that were highly popular and well tested.  Typically
that means the stuff more from the mid to late '90s, some with ISA PnP
support, like the 3c509, the wd/SMC 8390 based stuff, PCnet/lance etc.

But a lot of other drivers, typically from the early 1990s were for rare
hardware, and experimental (to the point of requiring a cron job that would
do a test ping, and then ifconfig down/up and/or a rmmod/insmod!).  And
some of these drivers (znet, and lp486e to name two) are physically tied
to platforms with on motherboard ethernet -- of 486 machines that date
from the early 1990s and can only have single digit amounts of memory.

What I'd like to achieve here with this series, is to get rid of those old
drivers that are no longer being used.  In an earlier discussion where
I'd proposed deleting a single driver, Alan suggested we instead dump
all the historical stuff in one go, to make it "...immediately obvious
where the break point is..."[1] and that it was "perfectly reasonable it
(and a pile of other ISA cards) ought to be shown the door"[2].  So that
is the goal here - make a clear line in the sand where the really ancient
stuff finally gets kicked to the curb.

Two old parallel port drivers are considered for removal here as well,
since in early 386/486 ISA machines, the parallel port was typically found
with the UARTS on the multi-I/O ISA controller card.  These drivers also date
from the early 1990's; parallel ports are no longer found on modern boards,
and their performance was not even capable of 10% of 10Mbit bandwidth.

Allow me a preemptive justification against the inevitable comments from
well meaning bystanders who suggest "why not just leave all this alone?".
Dead drivers cost us all if they are left in tree.  If you think that
is false, then please first consider:

-every time you type "git status", you are checking to see if modifications
 have been made by you to all that dead code.

-every time you type "git grep <regex>" you are searching through files
 which contain that dead code that simply does not interest you.

-every time you build a "allyesconfig" and an "allmodconfig" (don't tell
 me you skip this step before submitting your changes to a maintainer),
 you waste CPU cycles building this dead code.

-every time there is a tree wide API change, or cleanup, or file relocation,
 we pay the cost of updating dead code, or moving dead code.

-daily regression tests (take linux-next as the most transparent
 example) spend time building (and possibly running) this dead code.

-hard working people who regularly run auditing tools looking for lurking
 bugs (sparse/coverity/smatch/coccinelle) are wasting time checking for,
 and fixing bugs in this dead code.

This last one is key.  Please take a look at the git history for the
files that are proposed for removal here.  Look at the git history for
any one of them ("git whatchanged --follow drivers/net/.../driver.c")
Mentally sort the changes into two bins -- (1) the robotic tree-wide
changes, and (2) the "look I found a real run-time bug while using this"
category.  You will see that category #2 is essentially empty.

Further to that, realize that drivers don't simply disappear.  We are
not operating in the binary-only distribution space like other OS.  All
these drivers remain in the git history forever.  If a person is an
enthusiast for extreme legacy hardware, they are probably already
customizing their kernel source and building it themselves to support
such systems.  Also keep in mind that they could still build the 3.8
kernel exactly as-is, and run it (or a 3.8.x stable variant of it) for
several more years if they were really determined to cling to these old
experimental ISA drivers for some reason.

In summary, I hope that folks can be pragmatic about this, and not
get swept up in nostalgia.  Ask yourself whether it is realistic to
expect a person would have a genuine use case where they would
need to build a 3.9+ modern kernel and install it on some legacy hardware
that has no option but to absolutely _require_ one of the drivers
that are deleted here.

The following series was created with --irreversible-delete for
ease of review (it skips showing the content of files that are
deleted); however the complete patches can be pulled as per below.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

4 files changed, 0 insertions, 345 deletions

diff --git a/Documentation/networking/00-INDEX b/Documentation/networking/00-INDEX
index 1abfff26f8a0..258d9b92c36f 100644
--- a/Documentation/networking/00-INDEX
+++ b/Documentation/networking/00-INDEX
@@ -52,8 +52,6 @@ de4x5.txt
         - the Digital EtherWORKS DE4?? and DE5?? PCI Ethernet driver
 decnet.txt
         - info on using the DECnet networking layer in Linux.
-depca.txt
-        - the Digital DEPCA/EtherWORKS DE1?? and DE2?? LANCE Ethernet driver
 dl2k.txt
         - README for D-Link DL2000-based Gigabit Ethernet Adapters (dl2k.ko).
 dm9000.txt
@@ -72,8 +70,6 @@ e1000e.txt
         - README for the Intel Gigabit Ethernet Driver (e1000e).
 eql.txt
         - serial IP load balancing
-ewrk3.txt
-        - the Digital EtherWORKS 3 DE203/4/5 Ethernet driver
 fib_trie.txt
         - Level Compressed Trie (LC-trie) notes: a structure for routing.
 filter.txt
diff --git a/Documentation/networking/DLINK.txt b/Documentation/networking/DLINK.txt
deleted file mode 100644
index 55d24433d151..000000000000
--- a/Documentation/networking/DLINK.txt
+++ /dev/null
@@ -1,203 +0,0 @@
-Released 1994-06-13
-
-
-        CONTENTS:
-
-        1. Introduction.
-        2. License.
-        3. Files in this release.
-        4. Installation.
-        5. Problems and tuning.
-        6. Using the drivers with earlier releases.
-        7. Acknowledgments.
-
-
-        1. INTRODUCTION.
-
-        This is a set of Ethernet drivers for the D-Link DE-600/DE-620
-        pocket adapters, for the parallel port on a Linux based machine.
-        Some adapter "clones" will also work.  Xircom is _not_ a clone...
-        These drivers _can_ be used as loadable modules,
-        and were developed for use on Linux 1.1.13 and above.
-        For use on Linux 1.0.X, or earlier releases, see below.
-
-        I have used these drivers for NFS, ftp, telnet and X-clients on
-        remote machines. Transmissions with ftp seems to work as
-        good as can be expected (i.e. > 80k bytes/sec) from a
-        parallel port...:-)  Receive speeds will be about 60-80% of this.
-        Depending on your machine, somewhat higher speeds can be achieved.
-
-        All comments/fixes to Bjorn Ekwall (bj0rn@blox.se).
-
-
-        2. LICENSE.
-
-        This program is free software; you can redistribute it
-        and/or modify it under the terms of the GNU General Public
-        License as published by the Free Software Foundation; either
-        version 2, or (at your option) any later version.
-
-        This program is distributed in the hope that it will be
-        useful, but WITHOUT ANY WARRANTY; without even the implied
-        warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
-        PURPOSE. See the GNU General Public License for more
-        details.
-
-        You should have received a copy of the GNU General Public
-        License along with this program; if not, write to the Free
-        Software Foundation, Inc., 675 Mass Ave, Cambridge, MA
-        02139, USA.
-
-
-        3. FILES IN THIS RELEASE.
-
-        README.DLINK  This file.
-        de600.c       The Source (may it be with You :-) for the DE-600
-        de620.c       ditto for the DE-620
-        de620.h       Macros for de620.c
-
-        If you are upgrading from the d-link tar release, there will
-        also be a "dlink-patches" file that will patch Linux 1.1.18:
-                linux/drivers/net/Makefile
-                linux/drivers/net/CONFIG
-                linux/drivers/net/MODULES
-                linux/drivers/net/Space.c
-                linux/config.in
-        Apply the patch by:
-        "cd /usr/src; patch -p0 < linux/drivers/net/dlink-patches"
-        The old source, "linux/drivers/net/d_link.c", can be removed.
-
-
-        4. INSTALLATION.
-
-        o Get the latest net binaries, according to current net.wisdom.
-
-        o Read the NET-2 and Ethernet HOWTOs and modify your setup.
-
-        o If your parallel port has a strange address or irq,
-          modify "linux/drivers/net/CONFIG" accordingly, or adjust
-          the parameters in the "tuning" section in the sources.
-
-        If you are going to use the drivers as loadable modules, do _not_
-        enable them while doing "make config", but instead make sure that
-        the drivers are included in "linux/drivers/net/MODULES".
-
-        If you are _not_ going to use the driver(s) as loadable modules,
-        but instead have them included in the kernel, remember to enable
-        the drivers while doing "make config".
-
-        o To include networking and DE600/DE620 support in your kernel:
-          # cd /linux
-          (as modules:)
-          #  make config (answer yes on CONFIG_NET and CONFIG_INET)
-          (else included in the kernel:)
-          #  make config (answer yes on CONFIG _NET, _INET and _DE600 or _DE620)
-          # make clean
-          # make zImage (or whatever magic you usually do)
-
-        o I use lilo to boot multiple kernels, so that I at least
-          can have one working kernel :-). If you do too, append
-          these lines to /etc/lilo/config:
-
-                image = /linux/zImage
-                label = newlinux
-                root = /dev/hda2 (or whatever YOU have...)
-
-          # /etc/lilo/install
-
-        o Do "sync" and reboot the new kernel with a D-Link
-          DE-600/DE-620 pocket adapter connected.
-
-        o The adapter can be configured with ifconfig eth?
-          where the actual number is decided by the kernel
-          when the drivers are initialized.
-
-
-        5. "PROBLEMS" AND TUNING,
-
-        o If you see error messages from the driver, and if the traffic
-          stops on the adapter, try to do "ifconfig" and "route" once
-          more, just as in "rc.inet1".  This should take care of most
-          problems, including effects from power loss, or adapters that
-          aren't connected to the printer port in some way or another.
-          You can somewhat change the behaviour by enabling/disabling
-          the macro  SHUTDOWN_WHEN_LOST  in the "tuning" section.
-          For the DE-600 there is another macro, CHECK_LOST_DE600,
-          that you might want to read about in the "tuning" section.
-
-        o Some machines have trouble handling the parallel port and
-          the adapter at high speed. If you experience problems:
-
-          DE-600:
-          - The adapter is not recognized at boot, i.e. an Ethernet
-            address of 00:80:c8:... is not shown, try to add another
-              "; SLOW_DOWN_IO"
-            at DE600_SLOW_DOWN in the "tuning" section. As a last resort,
-            uncomment: "#define REALLY_SLOW_IO" (see <asm/io.h> for hints).
-
-          - You experience "timeout" messages: first try to add another
-              "; SLOW_DOWN_IO"
-            at DE600_SLOW_DOWN in the "tuning" section, _then_ try to
-            increase the value (original value: 5) at
-            "if (tickssofar < 5)" near line 422.
-
-          DE-620:
-          - Your parallel port might be "sluggish".  To cater for
-            this, there are the macros LOWSPEED and READ_DELAY/WRITE_DELAY
-            in the "tuning" section. Your first step should be to enable
-            LOWSPEED, and after that you can "tune" the XXX_DELAY values.
-
-        o If the adapter _is_ recognized at boot but you get messages
-          about "Network Unreachable", then the problem is probably
-          _not_ with the driver.  Check your net configuration instead
-          (ifconfig and route) in "rc.inet1".
-
-        o There is some rudimentary support for debugging, look at
-          the source. Use "-DDE600_DEBUG=3" or "-DDE620_DEBUG=3"
-          when compiling, or include it in "linux/drivers/net/CONFIG".
-          IF YOU HAVE PROBLEMS YOU CAN'T SOLVE: PLEASE COMPILE THE DRIVER
-          WITH DEBUGGING ENABLED, AND SEND ME THE RESULTING OUTPUT!
-
-
-        6. USING THE DRIVERS WITH EARLIER RELEASES.
-
-        The later 1.1.X releases of the Linux kernel include some
-        changes in the networking layer (a.k.a. NET3). This affects
-        these drivers in a few places.  The hints that follow are
-        _not_ tested by me, since I don't have the disk space to keep
-        all releases on-line.
-        Known needed changes to date:
-        - release patchfile: some patches will fail, but they should
-          be easy to apply "by hand", since they are trivial.
-          (Space.c: d_link_init() is now called de600_probe())
-        - de600.c: change  "mark_bh(NET_BH)" to  "mark_bh(INET_BH)".
-        - de620.c: (maybe) change the code around "netif_rx(skb);" to be
-                   similar to the code around "dev_rint(...)" in de600.c
-
-
-        7. ACKNOWLEDGMENTS.
-
-        These drivers wouldn't have been done without the base
-        (and support) from Ross Biro, and D-Link Systems Inc.
-        The driver relies upon GPL-ed source from D-Link Systems Inc.
-        and from Russel Nelson at Crynwr Software <nelson@crynwr.com>.
-
-        Additional input also from:
-        Donald Becker <becker@super.org>, Alan Cox <A.Cox@swansea.ac.uk>
-        and Fred N. van Kempen <waltje@uWalt.NL.Mugnet.ORG>
-
-        DE-600 alpha release primary victim^H^H^H^H^H^Htester:
-        - Erik Proper <erikp@cs.kun.nl>.
-        Good input also from several users, most notably
-        - Mark Burton <markb@ordern.demon.co.uk>.
-
-        DE-620 alpha release victims^H^H^H^H^H^H^Htesters:
-        - J. Joshua Kopper <kopper@rtsg.mot.com>
-        - Olav Kvittem <Olav.Kvittem@uninett.no>
-        - Germano Caronni <caronni@nessie.cs.id.ethz.ch>
-        - Jeremy Fitzhardinge <jeremy@suite.sw.oz.au>
-
-
-        Happy hacking!
-
-        Bjorn Ekwall == bj0rn@blox.se
diff --git a/Documentation/networking/depca.txt b/Documentation/networking/depca.txt
deleted file mode 100644
index 24c6b26e5658..000000000000
--- a/Documentation/networking/depca.txt
+++ /dev/null
@@ -1,92 +0,0 @@
-
-DE10x
-=====
-
-Memory Addresses:
-
-        SW1     SW2     SW3     SW4
-64K     on      on      on      on      d0000   dbfff
-        off     on      on      on      c0000   cbfff
-        off     off     on      on      e0000   ebfff
-
-32K     on      on      off     on      d8000   dbfff
-        off     on      off     on      c8000   cbfff
-        off     off     off     on      e8000   ebfff
-
-DBR ROM on      on                      dc000   dffff
-        off     on                      cc000   cffff
-        off     off                     ec000   effff
-
-Note  that the 2K  mode   is set  by   SW3/SW4  on/off or  off/off.  Address
-assignment is through the RBSA register.
-
-I/O Address:
-        SW5
-0x300   on
-0x200   off
-
-Remote Boot:
-        SW6
-Disable on
-Enable  off
-
-Remote Boot Timeout:
-        SW7
-2.5min  on
-30s     off
-
-IRQ:
-        SW8     SW9     SW10    SW11    SW12
-2       on      off     off     off     off
-3       off     on      off     off     off
-4       off     off     on      off     off
-5       off     off     off     on      off
-7       off     off     off     off     on
-
-DE20x
-=====
-
-Memory Size:
-
-        SW3     SW4
-64K     on      on
-32K     off     on
-2K      on      off
-2K      off     off
-
-Start Addresses:
-
-        SW1     SW2     SW3     SW4
-64K     on      on      on      on      c0000   cffff
-        on      off     on      on      d0000   dffff
-        off     on      on      on      e0000   effff
-
-32K     on      on      off     off     c8000   cffff
-        on      off     off     off     d8000   dffff
-        off     on      off     off     e8000   effff
-
-Illegal off     off      -       -        -       -
-
-I/O Address:
-        SW5
-0x300   on
-0x200   off
-
-Remote Boot:
-        SW6
-Disable on
-Enable  off
-
-Remote Boot Timeout:
-        SW7
-2.5min  on
-30s     off
-
-IRQ:
-        SW8     SW9     SW10    SW11    SW12
-5       on      off     off     off     off
-9       off     on      off     off     off
-10      off     off     on      off     off
-11      off     off     off     on      off
-15      off     off     off     off     on
-
diff --git a/Documentation/networking/ewrk3.txt b/Documentation/networking/ewrk3.txt
deleted file mode 100644
index 90e9e5f16e6b..000000000000
--- a/Documentation/networking/ewrk3.txt
+++ /dev/null
@@ -1,46 +0,0 @@
-The EtherWORKS 3  driver in this distribution is  designed to  work with all
-kernels   >  1.1.33   (approx)  and  includes  tools   in  the  'ewrk3tools'
-subdirectory   to  allow  set   up of   the   card,  similar  to  the  MSDOS
-'NICSETUP.EXE' tools provided on  the DOS drivers  disk (type 'make' in that
-subdirectory to make the tools).
-
-The supported  cards are DE203,  DE204 and DE205.  All   other cards are NOT
-supported - refer to 'depca.c' for running the LANCE based network cards and
-'de4x5.c'  for the  DIGITAL   Semiconductor PCI  chip  based  adapters  from
-Digital.
-
-The ability to load  this driver as a  loadable module has been included and
-used extensively  during the driver  development (to save those  long reboot
-sequences). To utilise this ability, you have to do 8 things:
-
-    0) have a copy of the loadable modules code installed on your system.
-    1) copy ewrk3.c from the  /linux/drivers/net directory to your favourite
-    temporary directory.
-    2) edit the  source code near  line 1898 to reflect  the I/O address and
-    IRQ you're using.
-    3) compile  ewrk3.c, but include -DMODULE in  the command line to ensure
-    that the correct bits are compiled (see end of source code).
-    4) if you are wanting to add a new  card, goto 5. Otherwise, recompile a
-    kernel with the ewrk3 configuration turned off and reboot.
-    5) insmod ewrk3.o
-          [Alan Cox: Changed this so you can insmod ewrk3.o irq=x io=y]
-          [Adam Kropelin: Multiple cards now supported by irq=x1,x2 io=y1,y2]
-    6) run the net startup bits for your new eth?? interface manually 
-    (usually /etc/rc.inet[12] at boot time). 
-    7) enjoy!
-
-    Note that autoprobing is not allowed in loadable modules - the system is
-    already up and running and you're messing with interrupts.
-
-    To unload a module, turn off the associated interface 
-    'ifconfig eth?? down' then 'rmmod ewrk3'.
-
-The performance we've  achieved so far  has been measured through the 'ttcp'
-tool   at 975kB/s.  This  measures  the  total  TCP  stack performance which
-includes the   card,  so don't  expect   to get   much nearer  the  1.25MB/s
-theoretical Ethernet rate.
-
-
-Enjoy!
-
-Dave