linux-kernel - x86_64: clang-10: <instantiation>:2:2: error: unknown use of instruction mnemonic without a size suffix

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Date:   Mon, 20 Sep 2021 08:55:46 +0530
From:   Naresh Kamboju <naresh.kamboju@...aro.org>
To:     clang-built-linux <clang-built-linux@...glegroups.com>,
        llvm@...ts.linux.dev, open list <linux-kernel@...r.kernel.org>,
        X86 ML <x86@...nel.org>
Cc:     Nathan Chancellor <natechancellor@...il.com>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Andy Lutomirski <luto@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>
Subject: x86_64: clang-10: <instantiation>:2:2: error: unknown use of
 instruction mnemonic without a size suffix

[Please ignore this email if it is already reported ]

Following build warnings/ errors noticed while building linux mainline
master branch
with clang-10 for x86_64 architecture.
But clang-11, clang-12 and clang-13 build pass.

<instantiation>:2:2: error: unknown use of instruction mnemonic
without a size suffix
 lsl %rax, %rax
 ^
<instantiation>:1:1: note: while in macro instantiation
LOAD_CPU_AND_NODE_SEG_LIMIT %rax
^
<instantiation>:2:2: note: while in macro instantiation
 GET_PERCPU_BASE %rax
 ^
/builds/linux/arch/x86/entry/entry_64.S:887:2: note: while in macro
instantiation
 SAVE_AND_SET_GSBASE scratch_reg=%rax save_reg=%rbx
 ^
make[3]: *** [/builds/linux/scripts/Makefile.build:379:
arch/x86/entry/entry_64.o] Error 1
arch/x86/entry/entry_64_compat.o: warning: objtool: .entry.text+0x215:
can't find jump dest instruction at .entry.text+0x21a
make[3]: Target '__build' not remade because of errors.
make[2]: *** [/builds/linux/scripts/Makefile.build:540: arch/x86/entry] Error 2
make[2]: Target '__build' not remade because of errors.
make[1]: *** [/builds/linux/Makefile:1868: arch/x86] Error 2

Build config:
https://builds.tuxbuild.com/1yNlOcqNwVJJje4WbGjSV4ZeBh6/config

Reported-by: Linux Kernel Functional Testing <lkft@...aro.org>

meta data:
-----------
    git_describe: v5.15-rc2
    git_ref:
    git_repo: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
    git_sha: e4e737bb5c170df6135a127739a9e6148ee3da82
    git_short_log: e4e737bb5c17 (\"Linux 5.15-rc2\")
    kconfig: [
        defconfig
    ],
    target_arch: x86_64
    toolchain: clang-10

steps to reproduce:
tuxmake --runtime podman --target-arch x86_64 --toolchain clang-10
--kconfig defconfig

https://builds.tuxbuild.com/1yNlOcqNwVJJje4WbGjSV4ZeBh6/tuxmake_reproducer.sh

--
Linaro LKFT
https://lkft.linaro.org