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, 83 deletions

diff --git a/arch/tile/include/asm/kprobes.h b/arch/tile/include/asm/kprobes.h
deleted file mode 100644
index 4a8b1cadca24..000000000000
--- a/arch/tile/include/asm/kprobes.h
+++ /dev/null
@@ -1,83 +0,0 @@
-/*
- * arch/tile/include/asm/kprobes.h
- *
- * Copyright 2012 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.
- */
-
-#ifndef _ASM_TILE_KPROBES_H
-#define _ASM_TILE_KPROBES_H
-
-#include <asm-generic/kprobes.h>
-
-#ifdef CONFIG_KPROBES
-
-#include <linux/types.h>
-#include <linux/ptrace.h>
-#include <linux/percpu.h>
-#include <arch/opcode.h>
-
-#define __ARCH_WANT_KPROBES_INSN_SLOT
-#define MAX_INSN_SIZE			2
-
-#define kretprobe_blacklist_size 0
-
-typedef tile_bundle_bits kprobe_opcode_t;
-
-#define flush_insn_slot(p)						\
-	flush_icache_range((unsigned long)p->addr,			\
-			   (unsigned long)p->addr +			\
-			   (MAX_INSN_SIZE * sizeof(kprobe_opcode_t)))
-
-struct kprobe;
-
-/* Architecture specific copy of original instruction. */
-struct arch_specific_insn {
-	kprobe_opcode_t *insn;
-};
-
-struct prev_kprobe {
-	struct kprobe *kp;
-	unsigned long status;
-	unsigned long saved_pc;
-};
-
-#define MAX_JPROBES_STACK_SIZE 128
-#define MAX_JPROBES_STACK_ADDR \
-	(((unsigned long)current_thread_info()) + THREAD_SIZE - 32 \
-		- sizeof(struct pt_regs))
-
-#define MIN_JPROBES_STACK_SIZE(ADDR)					\
-	((((ADDR) + MAX_JPROBES_STACK_SIZE) > MAX_JPROBES_STACK_ADDR)	\
-		? MAX_JPROBES_STACK_ADDR - (ADDR)			\
-		: MAX_JPROBES_STACK_SIZE)
-
-/* per-cpu kprobe control block. */
-struct kprobe_ctlblk {
-	unsigned long kprobe_status;
-	unsigned long kprobe_saved_pc;
-	unsigned long jprobe_saved_sp;
-	struct prev_kprobe prev_kprobe;
-	struct pt_regs jprobe_saved_regs;
-	char jprobes_stack[MAX_JPROBES_STACK_SIZE];
-};
-
-extern tile_bundle_bits breakpoint2_insn;
-extern tile_bundle_bits breakpoint_insn;
-
-void arch_remove_kprobe(struct kprobe *);
-
-extern int kprobe_exceptions_notify(struct notifier_block *self,
-			     unsigned long val, void *data);
-
-#endif /* CONFIG_KPROBES */
-#endif /* _ASM_TILE_KPROBES_H */