On Mon, Aug 26, 2019 at 10:42:53PM +0800, He Zhe wrote: > 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 Do you see this same problem on 5.3-rc6? And what version of gcc are you using? thanks, greg k-h