arch: remove tile port

The Tile architecture port was added by Chris Metcalf in 2010, and
maintained until early 2018 when he orphaned it due to his departure
from Mellanox, and nobody else stepped up to maintain it. The product
line is still around in the form of the BlueField SoC, but no longer
uses the Tile architecture.

There are also still products for sale with Tile-GX SoCs, notably the
Mikrotik CCR router family. The products all use old (linux-3.3) kernels
with lots of patches and won't be upgraded by their manufacturers. There
have been efforts to port both OpenWRT and Debian to these, but both
projects have stalled and are very unlikely to be continued in the future.

Given that we are reasonably sure that nobody is still using the port
with an upstream kernel any more, it seems better to remove it now while
the port is in a good shape than to let it bitrot for a few years first.

Cc: Chris Metcalf <chris.d.metcalf@gmail.com>
Cc: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
Link: http://www.mellanox.com/page/npu_multicore_overview
Link: https://jenkins.debian.net/view/rebootstrap/job/rebootstrap_tilegx_gcc7/
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

1 files changed, 0 insertions, 117 deletions

diff --git a/arch/tile/kernel/compat.c b/arch/tile/kernel/compat.c
deleted file mode 100644
index bdaf71d31a4a..000000000000
--- a/arch/tile/kernel/compat.c
+++ /dev/null
@@ -1,117 +0,0 @@
-/*
- * Copyright 2010 Tilera Corporation. All Rights Reserved.
- *
- *   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, version 2.
- *
- *   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, GOOD TITLE or
- *   NON INFRINGEMENT.  See the GNU General Public License for
- *   more details.
- */
-
-/* Adjust unistd.h to provide 32-bit numbers and functions. */
-#define __SYSCALL_COMPAT
-
-#include <linux/compat.h>
-#include <linux/syscalls.h>
-#include <linux/kdev_t.h>
-#include <linux/fs.h>
-#include <linux/fcntl.h>
-#include <linux/uaccess.h>
-#include <linux/signal.h>
-#include <asm/syscalls.h>
-#include <asm/byteorder.h>
-
-/*
- * Syscalls that take 64-bit numbers traditionally take them in 32-bit
- * "high" and "low" value parts on 32-bit architectures.
- * In principle, one could imagine passing some register arguments as
- * fully 64-bit on TILE-Gx in 32-bit mode, but it seems easier to
- * adopt the usual convention.
- */
-
-#ifdef __BIG_ENDIAN
-#define SYSCALL_PAIR(name) u32, name ## _hi, u32, name ## _lo
-#else
-#define SYSCALL_PAIR(name) u32, name ## _lo, u32, name ## _hi
-#endif
-
-COMPAT_SYSCALL_DEFINE4(truncate64, char __user *, filename, u32, dummy,
-		       SYSCALL_PAIR(length))
-{
-	return sys_truncate(filename, ((loff_t)length_hi << 32) | length_lo);
-}
-
-COMPAT_SYSCALL_DEFINE4(ftruncate64, unsigned int, fd, u32, dummy,
-		       SYSCALL_PAIR(length))
-{
-	return sys_ftruncate(fd, ((loff_t)length_hi << 32) | length_lo);
-}
-
-COMPAT_SYSCALL_DEFINE6(pread64, unsigned int, fd, char __user *, ubuf,
-		       size_t, count, u32, dummy, SYSCALL_PAIR(offset))
-{
-	return sys_pread64(fd, ubuf, count,
-			   ((loff_t)offset_hi << 32) | offset_lo);
-}
-
-COMPAT_SYSCALL_DEFINE6(pwrite64, unsigned int, fd, char __user *, ubuf,
-		       size_t, count, u32, dummy, SYSCALL_PAIR(offset))
-{
-	return sys_pwrite64(fd, ubuf, count,
-			    ((loff_t)offset_hi << 32) | offset_lo);
-}
-
-COMPAT_SYSCALL_DEFINE6(sync_file_range2, int, fd, unsigned int, flags,
-		       SYSCALL_PAIR(offset), SYSCALL_PAIR(nbytes))
-{
-	return sys_sync_file_range(fd, ((loff_t)offset_hi << 32) | offset_lo,
-				   ((loff_t)nbytes_hi << 32) | nbytes_lo,
-				   flags);
-}
-
-COMPAT_SYSCALL_DEFINE6(fallocate, int, fd, int, mode,
-		       SYSCALL_PAIR(offset), SYSCALL_PAIR(len))
-{
-	return sys_fallocate(fd, mode, ((loff_t)offset_hi << 32) | offset_lo,
-			     ((loff_t)len_hi << 32) | len_lo);
-}
-
-/*
- * Avoid bug in generic sys_llseek() that specifies offset_high and
- * offset_low as "unsigned long", thus making it possible to pass
- * a sign-extended high 32 bits in offset_low.
- * Note that we do not use SYSCALL_PAIR here since glibc passes the
- * high and low parts explicitly in that order.
- */
-COMPAT_SYSCALL_DEFINE5(llseek, unsigned int, fd, unsigned int, offset_high,
-		       unsigned int, offset_low, loff_t __user *, result,
-		       unsigned int, origin)
-{
-	return sys_llseek(fd, offset_high, offset_low, result, origin);
-}
-
-/* Provide the compat syscall number to call mapping. */
-#undef __SYSCALL
-#define __SYSCALL(nr, call) [nr] = (call),
-
-/* See comments in sys.c */
-#define compat_sys_fadvise64_64 sys32_fadvise64_64
-#define compat_sys_readahead sys32_readahead
-#define sys_llseek compat_sys_llseek
-
-/* Call the assembly trampolines where necessary. */
-#define compat_sys_rt_sigreturn _compat_sys_rt_sigreturn
-#define sys_clone _sys_clone
-
-/*
- * Note that we can't include <linux/unistd.h> here since the header
- * guard will defeat us; <asm/unistd.h> checks for __SYSCALL as well.
- */
-void *compat_sys_call_table[__NR_syscalls] = {
-	[0 ... __NR_syscalls-1] = sys_ni_syscall,
-#include <asm/unistd.h>
-};