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, 88 deletions

diff --git a/arch/blackfin/kernel/sys_bfin.c b/arch/blackfin/kernel/sys_bfin.c
deleted file mode 100644
index d998383cb956..000000000000
--- a/arch/blackfin/kernel/sys_bfin.c
+++ /dev/null
@@ -1,88 +0,0 @@
-/*
- * contains various random system calls that have a non-standard
- * calling sequence on the Linux/Blackfin platform.
- *
- * Copyright 2004-2009 Analog Devices Inc.
- *
- * Licensed under the GPL-2 or later
- */
-
-#include <linux/spinlock.h>
-#include <linux/sem.h>
-#include <linux/msg.h>
-#include <linux/shm.h>
-#include <linux/syscalls.h>
-#include <linux/mman.h>
-#include <linux/file.h>
-#include <linux/fs.h>
-#include <linux/uaccess.h>
-#include <linux/ipc.h>
-#include <linux/unistd.h>
-
-#include <asm/cacheflush.h>
-#include <asm/dma.h>
-#include <asm/cachectl.h>
-#include <asm/ptrace.h>
-
-asmlinkage void *sys_sram_alloc(size_t size, unsigned long flags)
-{
-	return sram_alloc_with_lsl(size, flags);
-}
-
-asmlinkage int sys_sram_free(const void *addr)
-{
-	return sram_free_with_lsl(addr);
-}
-
-asmlinkage void *sys_dma_memcpy(void *dest, const void *src, size_t len)
-{
-	return safe_dma_memcpy(dest, src, len);
-}
-
-#if defined(CONFIG_FB) || defined(CONFIG_FB_MODULE)
-#include <linux/fb.h>
-#include <linux/export.h>
-unsigned long get_fb_unmapped_area(struct file *filp, unsigned long orig_addr,
-	unsigned long len, unsigned long pgoff, unsigned long flags)
-{
-	struct fb_info *info = filp->private_data;
-	return (unsigned long)info->screen_base;
-}
-EXPORT_SYMBOL(get_fb_unmapped_area);
-#endif
-
-/* Needed for legacy userspace atomic emulation */
-static DEFINE_SPINLOCK(bfin_spinlock_lock);
-
-#ifdef CONFIG_SYS_BFIN_SPINLOCK_L1
-__attribute__((l1_text))
-#endif
-asmlinkage int sys_bfin_spinlock(int *p)
-{
-	int ret, tmp = 0;
-
-	spin_lock(&bfin_spinlock_lock); /* This would also hold kernel preemption. */
-	ret = get_user(tmp, p);
-	if (likely(ret == 0)) {
-		if (unlikely(tmp))
-			ret = 1;
-		else
-			put_user(1, p);
-	}
-	spin_unlock(&bfin_spinlock_lock);
-
-	return ret;
-}
-
-SYSCALL_DEFINE3(cacheflush, unsigned long, addr, unsigned long, len, int, op)
-{
-	if (is_user_addr_valid(current, addr, len) != 0)
-		return -EINVAL;
-
-	if (op & DCACHE)
-		blackfin_dcache_flush_range(addr, addr + len);
-	if (op & ICACHE)
-		blackfin_icache_flush_range(addr, addr + len);
-
-	return 0;
-}