x86/ftrace: Support objtool vmlinux.o validation in ftrace_64.S

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With objtool vmlinux.o validation of return_to_handler(), now that
objtool has visibility inside the retpoline, jumping from EMPTY state to
a proper function state results in a stack state mismatch.

return_to_handler() is actually quite normal despite the underlying
magic.  Just annotate it as a normal function.

Acked-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Link: https://lore.kernel.org/r/14f48e623f61dbdcd84cf27a56ed8ccae73199ef.1611263462.git.jpoimboe@redhat.com

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Josh Poimboeuf 2021-01-21 15:29:31 -06:00

parent 82694854ca

commit 7cae4b1cf1

1 changed files with 2 additions and 3 deletions

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arch/x86/kernel/ftrace_64.S

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