Merge tag 'arch-removal' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic

Pul removal of obsolete architecture ports from Arnd Bergmann:
 "This removes the entire architecture code for blackfin, cris, frv,
  m32r, metag, mn10300, score, and tile, including the associated device
  drivers.

  I have been working with the (former) maintainers for each one to
  ensure that my interpretation was right and the code is definitely
  unused in mainline kernels. Many had fond memories of working on the
  respective ports to start with and getting them included in upstream,
  but also saw no point in keeping the port alive without any users.

  In the end, it seems that while the eight architectures are extremely
  different, they all suffered the same fate: There was one company in
  charge of an SoC line, a CPU microarchitecture and a software
  ecosystem, which was more costly than licensing newer off-the-shelf
  CPU cores from a third party (typically ARM, MIPS, or RISC-V). It
  seems that all the SoC product lines are still around, but have not
  used the custom CPU architectures for several years at this point. In
  contrast, CPU instruction sets that remain popular and have actively
  maintained kernel ports tend to all be used across multiple licensees.

  [ See the new nds32 port merged in the previous commit for the next
    generation of "one company in charge of an SoC line, a CPU
    microarchitecture and a software ecosystem"   - Linus ]

  The removal came out of a discussion that is now documented at
  https://lwn.net/Articles/748074/. Unlike the original plans, I'm not
  marking any ports as deprecated but remove them all at once after I
  made sure that they are all unused. Some architectures (notably tile,
  mn10300, and blackfin) are still being shipped in products with old
  kernels, but those products will never be updated to newer kernel
  releases.

  After this series, we still have a few architectures without mainline
  gcc support:

   - unicore32 and hexagon both have very outdated gcc releases, but the
     maintainers promised to work on providing something newer. At least
     in case of hexagon, this will only be llvm, not gcc.

   - openrisc, risc-v and nds32 are still in the process of finishing
     their support or getting it added to mainline gcc in the first
     place. They all have patched gcc-7.3 ports that work to some
     degree, but complete upstream support won't happen before gcc-8.1.
     Csky posted their first kernel patch set last week, their situation
     will be similar

  [ Palmer Dabbelt points out that RISC-V support is in mainline gcc
    since gcc-7, although gcc-7.3.0 is the recommended minimum  - Linus ]"

This really says it all:

 2498 files changed, 95 insertions(+), 467668 deletions(-)

* tag 'arch-removal' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic: (74 commits)
  MAINTAINERS: UNICORE32: Change email account
  staging: iio: remove iio-trig-bfin-timer driver
  tty: hvc: remove tile driver
  tty: remove bfin_jtag_comm and hvc_bfin_jtag drivers
  serial: remove tile uart driver
  serial: remove m32r_sio driver
  serial: remove blackfin drivers
  serial: remove cris/etrax uart drivers
  usb: Remove Blackfin references in USB support
  usb: isp1362: remove blackfin arch glue
  usb: musb: remove blackfin port
  usb: host: remove tilegx platform glue
  pwm: remove pwm-bfin driver
  i2c: remove bfin-twi driver
  spi: remove blackfin related host drivers
  watchdog: remove bfin_wdt driver
  can: remove bfin_can driver
  mmc: remove bfin_sdh driver
  input: misc: remove blackfin rotary driver
  input: keyboard: remove bf54x driver
  ...

1 files changed, 0 insertions, 157 deletions

diff --git a/arch/mn10300/lib/do_csum.S b/arch/mn10300/lib/do_csum.S
deleted file mode 100644
index 1d27bba0cd8f..000000000000
--- a/arch/mn10300/lib/do_csum.S
+++ /dev/null
@@ -1,157 +0,0 @@
-/* Optimised simple memory checksum
- *
- * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
- * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public Licence
- * as published by the Free Software Foundation; either version
- * 2 of the Licence, or (at your option) any later version.
- */
-#include <asm/cache.h>
-
-	.section .text
-	.balign	L1_CACHE_BYTES
-
-###############################################################################
-#
-# unsigned int do_csum(const unsigned char *buff, int len)
-#
-###############################################################################
-	.globl	do_csum
-	.type	do_csum,@function
-do_csum:
-	movm	[d2,d3],(sp)
-	mov	d1,d2				# count
-	mov	d0,a0				# buff
-	mov	a0,a1
-	clr	d1				# accumulator
-
-	cmp	+0,d2
-	ble	do_csum_done			# check for zero length or negative
-
-	# 4-byte align the buffer pointer
-	btst	+3,a0
-	beq	do_csum_now_4b_aligned
-
-	btst	+1,a0
-	beq	do_csum_addr_not_odd
-	movbu	(a0),d0
-	inc	a0
-	asl	+8,d0
-	add	d0,d1
-	add	-1,d2
-
-do_csum_addr_not_odd:
-	cmp	+2,d2
-	bcs	do_csum_fewer_than_4
-	btst	+2,a0
-	beq	do_csum_now_4b_aligned
-	movhu	(a0+),d0
-	add	d0,d1
-	add	-2,d2
-	cmp	+4,d2
-	bcs	do_csum_fewer_than_4
-
-do_csum_now_4b_aligned:
-	# we want to checksum as much as we can in chunks of 32 bytes
-	cmp	+31,d2
-	bls	do_csum_remainder		# 4-byte aligned remainder
-
-	add	-32,d2
-	mov	+32,d3
-
-do_csum_loop:
-	mov	(a0+),d0
-	mov	(a0+),e0
-	mov	(a0+),e1
-	mov	(a0+),e3
-	add	d0,d1
-	addc	e0,d1
-	addc	e1,d1
-	addc	e3,d1
-	mov	(a0+),d0
-	mov	(a0+),e0
-	mov	(a0+),e1
-	mov	(a0+),e3
-	addc	d0,d1
-	addc	e0,d1
-	addc	e1,d1
-	addc	e3,d1
-	addc	+0,d1
-
-	sub	d3,d2
-	bcc	do_csum_loop
-
-	add	d3,d2
-	beq	do_csum_done
-
-do_csum_remainder:
-	# cut 16-31 bytes down to 0-15
-	cmp	+16,d2
-	bcs	do_csum_fewer_than_16
-	mov	(a0+),d0
-	mov	(a0+),e0
-	mov	(a0+),e1
-	mov	(a0+),e3
-	add	d0,d1
-	addc	e0,d1
-	addc	e1,d1
-	addc	e3,d1
-	addc	+0,d1
-	add	-16,d2
-	beq	do_csum_done
-
-do_csum_fewer_than_16:
-	# copy the remaining whole words
-	cmp	+4,d2
-	bcs	do_csum_fewer_than_4
-	cmp	+8,d2
-	bcs	do_csum_one_word
-	cmp	+12,d2
-	bcs	do_csum_two_words
-	mov	(a0+),d0
-	add	d0,d1
-	addc	+0,d1
-do_csum_two_words:
-	mov	(a0+),d0
-	add	d0,d1
-	addc	+0,d1
-do_csum_one_word:
-	mov	(a0+),d0
-	add	d0,d1
-	addc	+0,d1
-
-do_csum_fewer_than_4:
-	and	+3,d2
-	beq	do_csum_done
-	xor_cmp	d0,d0,+2,d2
-	bcs	do_csum_fewer_than_2
-	movhu	(a0+),d0
-	and	+1,d2
-	beq	do_csum_add_last_bit
-do_csum_fewer_than_2:
-	movbu	(a0),d3
-	add	d3,d0
-do_csum_add_last_bit:
-	add	d0,d1
-	addc	+0,d1
-
-do_csum_done:
-	# compress the checksum down to 16 bits
-	mov	+0xffff0000,d0
-	and	d1,d0
-	asl	+16,d1
-	add	d1,d0
-	addc	+0xffff,d0
-	lsr	+16,d0
-
-	# flip the halves of the word result if the buffer was oddly aligned
-	and	+1,a1
-	beq	do_csum_not_oddly_aligned
-	swaph	d0,d0				# exchange bits 15:8 with 7:0
-
-do_csum_not_oddly_aligned:
-	ret	[d2,d3],8
-
-	.size	do_csum, .-do_csum