linux-kernel - Re: [PATCH 0/8] selftests: x86: build suite with clang

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Date: Mon, 6 May 2024 16:26:25 -0700
From: Fangrui Song <maskray@...gle.com>
To: Muhammad Usama Anjum <usama.anjum@...labora.com>
Cc: Shuah Khan <shuah@...nel.org>, Nathan Chancellor <nathan@...nel.org>, 
	Nick Desaulniers <ndesaulniers@...gle.com>, Bill Wendling <morbo@...gle.com>, 
	Justin Stitt <justinstitt@...gle.com>, Rick Edgecombe <rick.p.edgecombe@...el.com>, 
	"Mike Rapoport (IBM)" <rppt@...nel.org>, Ingo Molnar <mingo@...nel.org>, 
	Dave Hansen <dave.hansen@...ux.intel.com>, Alexey Dobriyan <adobriyan@...il.com>, 
	Binbin Wu <binbin.wu@...ux.intel.com>, "Chang S. Bae" <chang.seok.bae@...el.com>, 
	"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>, linux-kselftest@...r.kernel.org, 
	linux-kernel@...r.kernel.org, llvm@...ts.linux.dev, kernel@...labora.com
Subject: Re: [PATCH 0/8] selftests: x86: build suite with clang

On Wed, May 1, 2024 at 5:29 AM Muhammad Usama Anjum
<usama.anjum@...labora.com> wrote:
>
> This series fixes build errors found by clang to allow the x86 suite to
> get built with the clang.
>
> Unfortunately, there is one bug [1] in the clang becuase of which
> extended asm isn't handled correctly by it and build fails for
> sysret_rip.c. Hence even after this series the build of this test would
> fail with clang. Should we disable this test for now when clang is used
> until the bug is fixed in clang? Not sure. Any opinions?
>
> [1] https://github.com/llvm/llvm-project/issues/53728

I've closed https://github.com/llvm/llvm-project/issues/53728
(constant expression folding for relocatable file output
(MCObjectStreamer)).

I've sent a patch to address https://github.com/llvm/llvm-project/issues/62520
(constant expression folding for relocatable file output  when inline
assembly is used).

(I am subscribed to llvm@...ts.linux.dev but rarely read it. I noticed
this message accidentally :) )

> Muhammad Usama Anjum (8):
>   selftests: x86: Remove dependence of headers file
>   selftests: x86: check_initial_reg_state: remove -no-pie while using
>     -static
>   selftests: x86: test_vsyscall: remove unused function
>   selftests: x86: fsgsbase_restore: fix asm directive from =rm to =r
>   selftests: x86: syscall_arg_fault_32: remove unused variable
>   selftests: x86: test_FISTTP: use fisttps instead of ambigous fisttp
>   selftests: x86: fsgsbase: Remove unused function and variable
>   selftests: x86: amx: Remove unused functions
>
>  tools/testing/selftests/x86/Makefile            |  9 +++++----
>  tools/testing/selftests/x86/amx.c               | 16 ----------------
>  tools/testing/selftests/x86/fsgsbase.c          |  6 ------
>  tools/testing/selftests/x86/fsgsbase_restore.c  |  2 +-
>  tools/testing/selftests/x86/syscall_arg_fault.c |  1 -
>  tools/testing/selftests/x86/test_FISTTP.c       |  8 ++++----
>  tools/testing/selftests/x86/test_vsyscall.c     |  5 -----
>  7 files changed, 10 insertions(+), 37 deletions(-)
>
> --
> 2.39.2
>
>


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