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charset="UTF-8" Content-Transfer-Encoding: quoted-printable User-Agent: Evolution 3.54.1 (3.54.1-1.fc41) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Sender: riel@surriel.com On Fri, 2025-01-17 at 11:37 +0800, kernel test robot wrote: >=20 > compiler: clang version 19.1.3 > (https://github.com/llvm/llvm-project=C2=A0ab51eccf88f5321e7c60591c5546b2= 5 > 4b6afab99) > reproduce (this is a W=3D1 build): > (https://download.01.org/0day-ci/archive/20250117/202501171121.nQcwVI > 41-lkp@intel.com/reproduce) >=20 > > > arch/x86/include/asm/invlpgb.h:26:49: error: invalid input size > > > for constraint 'a' > =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 26 |=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0 asm volatile(".byte 0x0f, 0x01, 0xfe" : : "a" > (rax), "c" (ecx), "d" (edx)); > =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 |=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0 ^ >=20 What do I do about this? It didn't used to complain when we had a named assembler operator there: asm volatile("invlpgb" : : "a" (rax), "c" (ecx), "d" (edx)); However, now that we're using .byte for compatibility with older binutils, things break with newer llvm? --=20 All Rights Reversed.