linux-kernel - [PATCH] tracing: Fix HAVE_DYNAMIC_FTRACE_WITH

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Date: Tue, 13 Feb 2024 14:24:34 +0100
From: Petr Pavlu <petr.pavlu@...e.com>
To: rostedt@...dmis.org,
	mhiramat@...nel.org,
	mark.rutland@....com,
	mathieu.desnoyers@...icios.com,
	jolsa@...nel.org
Cc: linux-trace-kernel@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Petr Pavlu <petr.pavlu@...e.com>
Subject: [PATCH] tracing: Fix HAVE_DYNAMIC_FTRACE_WITH_REGS ifdef

Commit a8b9cf62ade1 ("ftrace: Fix DIRECT_CALLS to use SAVE_REGS by
default") attempted to fix an issue with direct trampolines on x86, see
its description for details. However, it wrongly referenced the
HAVE_DYNAMIC_FTRACE_WITH_REGS config option and the problem is still
present.

Add the missing "CONFIG_" prefix for the logic to work as intended.

Fixes: a8b9cf62ade1 ("ftrace: Fix DIRECT_CALLS to use SAVE_REGS by default")
Signed-off-by: Petr Pavlu <petr.pavlu@...e.com>
---
 kernel/trace/ftrace.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index c060d5b47910..83ba342aef31 100644
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -5331,7 +5331,7 @@ static int register_ftrace_function_nolock(struct ftrace_ops *ops);
  * not support ftrace_regs_caller but direct_call, use SAVE_ARGS so that it
  * jumps from ftrace_caller for multiple ftrace_ops.
  */
-#ifndef HAVE_DYNAMIC_FTRACE_WITH_REGS
+#ifndef CONFIG_HAVE_DYNAMIC_FTRACE_WITH_REGS
 #define MULTI_FLAGS (FTRACE_OPS_FL_DIRECT | FTRACE_OPS_FL_SAVE_ARGS)
 #else
 #define MULTI_FLAGS (FTRACE_OPS_FL_DIRECT | FTRACE_OPS_FL_SAVE_REGS)

base-commit: 841c35169323cd833294798e58b9bf63fa4fa1de
-- 
2.35.3