[PATCH v4 31/57] x86/dumpstack/ftrace: don't print unreliable addresses in print_context_stack_bp()

[Josh Poimboeuf]

When function graph tracing is enabled, print_context_stack_bp() can
report return_to_handler() as an unreliable address, which is confusing
and misleading: return_to_handler() is really only useful as a hint for
debugging, whereas print_context_stack_bp() users only care about the
actual 'reliable' call path.

Signed-off-by: Josh Poimboeuf <jpoimboe@xxxxxxxxxx>
---
 arch/x86/kernel/dumpstack.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/arch/x86/kernel/dumpstack.c b/arch/x86/kernel/dumpstack.c
index 33f2899..c6c6c39 100644
--- a/arch/x86/kernel/dumpstack.c
+++ b/arch/x86/kernel/dumpstack.c
@@ -127,8 +127,6 @@ print_context_stack_bp(struct task_struct *task,
 			break;
 
 		real_addr = ftrace_graph_ret_addr(task, graph, addr, retp);
-		if (real_addr != addr && ops->address(data, addr, 0))
-			break;
 		if (ops->address(data, real_addr, 1))
 			break;
 
-- 
2.7.4