linux-kernel - [PATCH] ftrace/x86_64: Have function graph tracer depend on DYNAMIC

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Message-ID: <20211020233555.16b0dbf2@rorschach.local.home>
Date:   Wed, 20 Oct 2021 23:35:55 -0400
From:   Steven Rostedt <rostedt@...dmis.org>
To:     LKML <linux-kernel@...r.kernel.org>
Cc:     Ingo Molnar <mingo@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Jiri Olsa <jolsa@...hat.com>
Subject: [PATCH] ftrace/x86_64: Have function graph tracer depend on
 DYNAMIC_FTRACE

From: "Steven Rostedt (VMware)" <rostedt@...dmis.org>

The function graph tracer is going to now depend on
ARCH_SUPPORTS_FTRACE_OPS, as that also means that it can support ftrace
args. Since ARCH_SUPPORTS_FTRACE_OPS depends on DYNAMIC_FTRACE, this
means that the function graph tracer for x86_64 will need to depend on
DYNAMIC_FTRACE.

Signed-off-by: Steven Rostedt (VMware) <rostedt@...dmis.org>
---
 arch/x86/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index ab83c22d274e..e39e2bd6acc5 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -197,7 +197,7 @@ config X86
 	select HAVE_FAST_GUP
 	select HAVE_FENTRY			if X86_64 || DYNAMIC_FTRACE
 	select HAVE_FTRACE_MCOUNT_RECORD
-	select HAVE_FUNCTION_GRAPH_TRACER
+	select HAVE_FUNCTION_GRAPH_TRACER	if X86_32 || (X86_64 && DYNAMIC_FTRACE)
 	select HAVE_FUNCTION_TRACER
 	select HAVE_GCC_PLUGINS
 	select HAVE_HW_BREAKPOINT
-- 
2.31.1