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From:   He Zhe <zhe.he@windriver.com>
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        He Zhe <Zhe.He@windriver.com>
Subject: kernel/bpf/core.o: warning: objtool: ___bpf_prog_run.cold()+0x7: call
 without frame pointer save/setup
Message-ID: <cf0273fb-c272-72be-50f9-b25bb7c7f183@windriver.com>
Date:   Mon, 26 Aug 2019 22:42:53 +0800
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Sender: linux-kernel-owner@vger.kernel.org
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Hi All,

Since 3193c0836f20 ("bpf: Disable GCC -fgcse optimization for ___bpf_prog_run()"),
We have got the following warning,
kernel/bpf/core.o: warning: objtool: ___bpf_prog_run.cold()+0x7: call without frame pointer save/setup

If reverting the above commit, we will get the following warning,
kernel/bpf/core.o: warning: objtool: ___bpf_prog_run()+0x8b9: sibling call from callable instruction with modified stack frame
if CONFIG_RETPOLINE=n, and no warning if CONFIG_RETPOLINE=y


Zhe