objtool: Don't fail on missing symbol table
stable inclusion from stable-5.10.12 commit c6fd968f58439398b765300aecd7758d501ee49c bugzilla: 47876 -------------------------------- commit 1d489151 upstream. Thanks to a recent binutils change which doesn't generate unused symbols, it's now possible for thunk_64.o be completely empty without CONFIG_PREEMPTION: no text, no data, no symbols. We could edit the Makefile to only build that file when CONFIG_PREEMPTION is enabled, but that will likely create confusion if/when the thunks end up getting used by some other code again. Just ignore it and move on. Reported-by: NNathan Chancellor <natechancellor@gmail.com> Reviewed-by: NNathan Chancellor <natechancellor@gmail.com> Reviewed-by: NMiroslav Benes <mbenes@suse.cz> Tested-by: NNathan Chancellor <natechancellor@gmail.com> Link: https://github.com/ClangBuiltLinux/linux/issues/1254Signed-off-by: NJosh Poimboeuf <jpoimboe@redhat.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: NChen Jun <chenjun102@huawei.com> Acked-by: NXie XiuQi <xiexiuqi@huawei.com> Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>
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