arch: remove blackfin port

The Analog Devices Blackfin port was added in 2007 and was rather
active for a while, but all work on it has come to a standstill
over time, as Analog have changed their product line-up.

Aaron Wu confirmed that the architecture port is no longer relevant,
and multiple people suggested removing blackfin independently because
of some of its oddities like a non-working SMP port, and the amount of
duplication between the chip variants, which cause extra work when
doing cross-architecture changes.

Link: https://docs.blackfin.uclinux.org/
Acked-by: Aaron Wu <Aaron.Wu@analog.com>
Acked-by: Bryan Wu <cooloney@gmail.com>
Cc: Steven Miao <realmz6@gmail.com>
Cc: Mike Frysinger <vapier@chromium.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

1 files changed, 0 insertions, 42 deletions

diff --git a/arch/blackfin/include/asm/ptrace.h b/arch/blackfin/include/asm/ptrace.h
deleted file mode 100644
index c00491594b46..000000000000
--- a/arch/blackfin/include/asm/ptrace.h
+++ /dev/null
@@ -1,42 +0,0 @@
-/*
- * Copyright 2004-2008 Analog Devices Inc.
- *
- * Licensed under the GPL-2 or later.
- */
-#ifndef _BFIN_PTRACE_H
-#define _BFIN_PTRACE_H
-
-#include <uapi/asm/ptrace.h>
-
-#ifndef __ASSEMBLY__
-
-/* user_mode returns true if only one bit is set in IPEND, other than the
-   master interrupt enable.  */
-#define user_mode(regs) (!(((regs)->ipend & ~0x10) & (((regs)->ipend & ~0x10) - 1)))
-
-#define arch_has_single_step()	(1)
-/* common code demands this function */
-#define ptrace_disable(child) user_disable_single_step(child)
-#define current_user_stack_pointer() rdusp()
-
-extern int is_user_addr_valid(struct task_struct *child,
-			      unsigned long start, unsigned long len);
-
-/*
- * Get the address of the live pt_regs for the specified task.
- * These are saved onto the top kernel stack when the process
- * is not running.
- *
- * Note: if a user thread is execve'd from kernel space, the
- * kernel stack will not be empty on entry to the kernel, so
- * ptracing these tasks will fail.
- */
-#define task_pt_regs(task) \
-	(struct pt_regs *) \
-	    ((unsigned long)task_stack_page(task) + \
-	     (THREAD_SIZE - sizeof(struct pt_regs)))
-
-#include <asm-generic/ptrace.h>
-
-#endif				/* __ASSEMBLY__ */
-#endif				/* _BFIN_PTRACE_H */