Merge tag 'metag_remove_2' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/jhogan/metag into asm-generic

Remove metag architecture

These patches remove the metag architecture and tightly dependent
drivers from the kernel. With the 4.16 kernel the ancient gcc 4.2.4
based metag toolchain we have been using is hitting compiler bugs, so
now seems a good time to drop it altogether.

* tag 'metag_remove_2' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/jhogan/metag:
  i2c: img-scb: Drop METAG dependency
  media: img-ir: Drop METAG dependency
  watchdog: imgpdc: Drop METAG dependency
  MAINTAINERS/CREDITS: Drop METAG ARCHITECTURE
  tty: Remove metag DA TTY and console driver
  clocksource: Remove metag generic timer driver
  irqchip: Remove metag irqchip drivers
  Drop a bunch of metag references
  docs: Remove remaining references to metag
  docs: Remove metag docs
  metag: Remove arch/metag/

Signed-off-by: Arnd Bergmann <arnd@arndb.de>

1 files changed, 0 insertions, 187 deletions

diff --git a/arch/metag/kernel/stacktrace.c b/arch/metag/kernel/stacktrace.c
deleted file mode 100644
index 09d67b7f51ca..000000000000
--- a/arch/metag/kernel/stacktrace.c
+++ /dev/null
@@ -1,187 +0,0 @@
-#include <linux/export.h>
-#include <linux/sched.h>
-#include <linux/sched/debug.h>
-#include <linux/sched/task_stack.h>
-#include <linux/stacktrace.h>
-
-#include <asm/stacktrace.h>
-
-#if defined(CONFIG_FRAME_POINTER)
-
-#ifdef CONFIG_KALLSYMS
-#include <linux/kallsyms.h>
-#include <linux/module.h>
-
-static unsigned long tbi_boing_addr;
-static unsigned long tbi_boing_size;
-
-static void tbi_boing_init(void)
-{
-	/* We need to know where TBIBoingVec is and it's size */
-	unsigned long size;
-	unsigned long offset;
-	char modname[MODULE_NAME_LEN];
-	char name[KSYM_NAME_LEN];
-	tbi_boing_addr = kallsyms_lookup_name("___TBIBoingVec");
-	if (!tbi_boing_addr)
-		tbi_boing_addr = 1;
-	else if (!lookup_symbol_attrs(tbi_boing_addr, &size,
-				      &offset, modname, name))
-		tbi_boing_size = size;
-}
-#endif
-
-/*
- * Unwind the current stack frame and store the new register values in the
- * structure passed as argument. Unwinding is equivalent to a function return,
- * hence the new PC value rather than LR should be used for backtrace.
- */
-int notrace unwind_frame(struct stackframe *frame)
-{
-	struct metag_frame *fp = (struct metag_frame *)frame->fp;
-	unsigned long lr;
-	unsigned long fpnew;
-
-	if (frame->fp & 0x7)
-		return -EINVAL;
-
-	fpnew = fp->fp;
-	lr = fp->lr - 4;
-
-#ifdef CONFIG_KALLSYMS
-	/* If we've reached TBIBoingVec then we're at an interrupt
-	 * entry point or a syscall entry point. The frame pointer
-	 * points to a pt_regs which can be used to continue tracing on
-	 * the other side of the boing.
-	 */
-	if (!tbi_boing_addr)
-		tbi_boing_init();
-	if (tbi_boing_size && lr >= tbi_boing_addr &&
-	    lr < tbi_boing_addr + tbi_boing_size) {
-		struct pt_regs *regs = (struct pt_regs *)fpnew;
-		if (user_mode(regs))
-			return -EINVAL;
-		fpnew = regs->ctx.AX[1].U0;
-		lr = regs->ctx.DX[4].U1;
-	}
-#endif
-
-	/* stack grows up, so frame pointers must decrease */
-	if (fpnew < (ALIGN_DOWN((unsigned long)fp, THREAD_SIZE) +
-		     sizeof(struct thread_info)) || fpnew >= (unsigned long)fp)
-		return -EINVAL;
-
-	/* restore the registers from the stack frame */
-	frame->fp = fpnew;
-	frame->pc = lr;
-
-	return 0;
-}
-#else
-int notrace unwind_frame(struct stackframe *frame)
-{
-	struct metag_frame *sp = (struct metag_frame *)frame->sp;
-
-	if (frame->sp & 0x7)
-		return -EINVAL;
-
-	while (!kstack_end(sp)) {
-		unsigned long addr = sp->lr - 4;
-		sp--;
-
-		if (__kernel_text_address(addr)) {
-			frame->sp = (unsigned long)sp;
-			frame->pc = addr;
-			return 0;
-		}
-	}
-	return -EINVAL;
-}
-#endif
-
-void notrace walk_stackframe(struct stackframe *frame,
-		     int (*fn)(struct stackframe *, void *), void *data)
-{
-	while (1) {
-		int ret;
-
-		if (fn(frame, data))
-			break;
-		ret = unwind_frame(frame);
-		if (ret < 0)
-			break;
-	}
-}
-EXPORT_SYMBOL(walk_stackframe);
-
-#ifdef CONFIG_STACKTRACE
-struct stack_trace_data {
-	struct stack_trace *trace;
-	unsigned int no_sched_functions;
-	unsigned int skip;
-};
-
-static int save_trace(struct stackframe *frame, void *d)
-{
-	struct stack_trace_data *data = d;
-	struct stack_trace *trace = data->trace;
-	unsigned long addr = frame->pc;
-
-	if (data->no_sched_functions && in_sched_functions(addr))
-		return 0;
-	if (data->skip) {
-		data->skip--;
-		return 0;
-	}
-
-	trace->entries[trace->nr_entries++] = addr;
-
-	return trace->nr_entries >= trace->max_entries;
-}
-
-void save_stack_trace_tsk(struct task_struct *tsk, struct stack_trace *trace)
-{
-	struct stack_trace_data data;
-	struct stackframe frame;
-
-	data.trace = trace;
-	data.skip = trace->skip;
-
-	if (tsk != current) {
-#ifdef CONFIG_SMP
-		/*
-		 * What guarantees do we have here that 'tsk' is not
-		 * running on another CPU?  For now, ignore it as we
-		 * can't guarantee we won't explode.
-		 */
-		if (trace->nr_entries < trace->max_entries)
-			trace->entries[trace->nr_entries++] = ULONG_MAX;
-		return;
-#else
-		data.no_sched_functions = 1;
-		frame.fp = thread_saved_fp(tsk);
-		frame.sp = thread_saved_sp(tsk);
-		frame.lr = 0;		/* recovered from the stack */
-		frame.pc = thread_saved_pc(tsk);
-#endif
-	} else {
-		register unsigned long current_sp asm ("A0StP");
-
-		data.no_sched_functions = 0;
-		frame.fp = (unsigned long)__builtin_frame_address(0);
-		frame.sp = current_sp;
-		frame.lr = (unsigned long)__builtin_return_address(0);
-		frame.pc = (unsigned long)save_stack_trace_tsk;
-	}
-
-	walk_stackframe(&frame, save_trace, &data);
-	if (trace->nr_entries < trace->max_entries)
-		trace->entries[trace->nr_entries++] = ULONG_MAX;
-}
-
-void save_stack_trace(struct stack_trace *trace)
-{
-	save_stack_trace_tsk(current, trace);
-}
-EXPORT_SYMBOL_GPL(save_stack_trace);
-#endif