arch/x86/entry/entry_64.S:487: Warning: no instruction mnemonic suffix given and no register operands; using default for `btr'
arch/x86/kernel/process.c:456: Warning: no instruction mnemonic suffix given and no register operands; using default for `btr'
arch/x86/kernel/process.c:456: Warning: no instruction mnemonic suffix given and no register operands; using default for `btr'
cc1: some warnings being treated as errors