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Message-Id: <8c06a9137fb88d62d0af7d9d358317919ba8a001.1610652862.git.jpoimboe@redhat.com>
Date: Thu, 14 Jan 2021 13:40:02 -0600
From: Josh Poimboeuf <jpoimboe@...hat.com>
To: x86@...nel.org
Cc: linux-kernel@...r.kernel.org,
Peter Zijlstra <peterz@...radead.org>,
Sami Tolvanen <samitolvanen@...gle.com>,
Sedat Dilek <sedat.dilek@...il.com>,
Kees Cook <keescook@...omium.org>,
Nick Desaulniers <ndesaulniers@...gle.com>,
clang-built-linux@...glegroups.com,
Miroslav Benes <mbenes@...e.cz>,
Steven Rostedt <rostedt@...dmis.org>
Subject: [PATCH 06/21] x86/ftrace: Add UNWIND_HINT_FUNC annotation for ftrace_stub
Prevent an unreachable objtool warning after the sibling call detection
gets improved. ftrace_stub() is basically a function, annotate it as
such.
Cc: Steven Rostedt <rostedt@...dmis.org>
Signed-off-by: Josh Poimboeuf <jpoimboe@...hat.com>
---
arch/x86/kernel/ftrace_64.S | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/x86/kernel/ftrace_64.S b/arch/x86/kernel/ftrace_64.S
index 0d54099c2a3a..58d125ed9d1a 100644
--- a/arch/x86/kernel/ftrace_64.S
+++ b/arch/x86/kernel/ftrace_64.S
@@ -184,6 +184,7 @@ SYM_INNER_LABEL(ftrace_graph_call, SYM_L_GLOBAL)
* It is also used to copy the retq for trampolines.
*/
SYM_INNER_LABEL_ALIGN(ftrace_stub, SYM_L_WEAK)
+ UNWIND_HINT_FUNC
retq
SYM_FUNC_END(ftrace_epilogue)
--
2.29.2
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