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x86/ftrace: Add UNWIND_HINT_FUNC annotation for ftrace_stub

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commit 18660698a3d30868524cefb60dcd4e0e297f71bb upstream.

Prevent an unreachable objtool warning after the sibling call detection
gets improved.  ftrace_stub() is basically a function, annotate it as
such.

Acked-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Link: https://lore.kernel.org/r/6845e1b2fb0723a95740c6674e548ba38c5ea489.1611263461.git.jpoimboe@redhat.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Josh Poimboeuf 2021-01-21 15:29:21 -06:00 committed by Greg Kroah-Hartman
parent 668cb1ddf0
commit 95d89ec7db
1 changed files with 1 additions and 0 deletions
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arch/x86/kernel/ftrace_64.S
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@ -173,6 +173,7 @@ SYM_INNER_LABEL(ftrace_graph_call, SYM_L_GLOBAL)
* It is also used to copy the RET for trampolines.
*/
SYM_INNER_LABEL_ALIGN(ftrace_stub, SYM_L_WEAK)
UNWIND_HINT_FUNC
RET
SYM_FUNC_END(ftrace_epilogue)