x86/dumpstack: Remove dump_trace() and related callbacks

All previous users of dump_trace() have been converted to use the new
unwind interfaces, so we can remove it and the related
print_context_stack() and print_context_stack_bp() callback functions.

Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Byungchul Park <byungchul.park@lge.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Nilay Vaish <nilayvaish@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/5b97da3572b40b5a4d8e185cf2429308d0987a13.1474045023.git.jpoimboe@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>

1 files changed, 0 insertions, 69 deletions

diff --git a/arch/x86/kernel/dumpstack_64.c b/arch/x86/kernel/dumpstack_64.c
index 4e9f2cf64ac8..36cf1a498227 100644
--- a/arch/x86/kernel/dumpstack_64.c
+++ b/arch/x86/kernel/dumpstack_64.c
@@ -140,75 +140,6 @@ unknown:
 	return -EINVAL;
 }
 
-/*
- * x86-64 can have up to three kernel stacks:
- * process stack
- * interrupt stack
- * severe exception (double fault, nmi, stack fault, debug, mce) hardware stack
- */
-
-void dump_trace(struct task_struct *task, struct pt_regs *regs,
-		unsigned long *stack, unsigned long bp,
-		const struct stacktrace_ops *ops, void *data)
-{
-	unsigned long visit_mask = 0;
-	struct stack_info info;
-	int graph = 0;
-	int done = 0;
-
-	task = task ? : current;
-	stack = stack ? : get_stack_pointer(task, regs);
-	bp = bp ? : (unsigned long)get_frame_pointer(task, regs);
-
-	/*
-	 * Print function call entries in all stacks, starting at the
-	 * current stack address. If the stacks consist of nested
-	 * exceptions
-	 */
-	while (!done) {
-		const char *begin_str, *end_str;
-
-		get_stack_info(stack, task, &info, &visit_mask);
-
-		/* Default finish unless specified to continue */
-		done = 1;
-
-		switch (info.type) {
-
-		/* Break out early if we are on the thread stack */
-		case STACK_TYPE_TASK:
-			break;
-
-		case STACK_TYPE_IRQ:
-		case STACK_TYPE_EXCEPTION ... STACK_TYPE_EXCEPTION_LAST:
-
-			stack_type_str(info.type, &begin_str, &end_str);
-
-			if (ops->stack(data, begin_str) < 0)
-				break;
-
-			bp = ops->walk_stack(task, stack, bp, ops,
-					     data, &info, &graph);
-
-			ops->stack(data, end_str);
-
-			stack = info.next_sp;
-			done = 0;
-			break;
-
-		default:
-			ops->stack(data, "UNK");
-			break;
-		}
-	}
-
-	/*
-	 * This handles the process stack:
-	 */
-	bp = ops->walk_stack(task, stack, bp, ops, data, &info, &graph);
-}
-EXPORT_SYMBOL(dump_trace);
-
 void show_stack_log_lvl(struct task_struct *task, struct pt_regs *regs,
 			unsigned long *sp, char *log_lvl)
 {