linux-kernel - Re: [tip:master 19/19] include/linux/irq-entry-common.h:201:2: error: unexpected token

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Message-ID: <20250702130915.GEaGUve86iYnv337_Z@fat_crate.local>
Date: Wed, 2 Jul 2025 15:09:15 +0200
From: Borislav Petkov <bp@...en8.de>
To: Mark Rutland <mark.rutland@....com>
Cc: kernel test robot <lkp@...el.com>, Thomas Gleixner <tglx@...utronix.de>,
	llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
	linux-kernel@...r.kernel.org, x86@...nel.org,
	Linus Walleij <linus.walleij@...aro.org>,
	Jinjie Ruan <ruanjinjie@...wei.com>
Subject: Re: [tip:master 19/19] include/linux/irq-entry-common.h:201:2:
 error: unexpected token

Hey,

On Wed, Jul 02, 2025 at 01:58:50PM +0100, Mark Rutland wrote:
> Hi Boris,
> 
> [ adding Linux and Jinjie, since this is almost certainly due to the
>   irqentry split ]
> 
> On Wed, Jul 02, 2025 at 02:32:40PM +0200, Borislav Petkov wrote:
> > On Wed, Jul 02, 2025 at 05:56:06AM +0800, kernel test robot wrote:
> > > tree:   https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git master
> > > head:   104f02a7798f7e8aba25545f9d485035532260b2
> > > commit: 104f02a7798f7e8aba25545f9d485035532260b2 [19/19] Merge core/entry into tip/master
> > > config: s390-allmodconfig (https://download.01.org/0day-ci/archive/20250702/202507020528.N0LtekXt-lkp@intel.com/config)
> > > compiler: clang version 18.1.8 (https://github.com/llvm/llvm-project 3b5b5c1ec4a3095ab096dd780e84d7ab81f3d7ff)
> > > reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250702/202507020528.N0LtekXt-lkp@intel.com/reproduce)
> > 
> > I'm trying to follow your reproducer and installed binutils-s390x-linux-gnu.
> > 
> > However: 
> > 
> > make CC=clang HOSTCC=clang W=1 ARCH=s390 arch/s390/ 
> >   SYNC    include/config/auto.conf.cmd
> >   CALL    scripts/checksyscalls.sh
> >   VDSO    arch/s390/kernel/vdso64/vdso64.so.dbg
> > ld: unrecognised emulation mode: elf64_s390
> > Supported emulations: elf_x86_64 elf32_x86_64 elf_i386 elf_iamcu i386pep i386pe
> > make[2]: *** [arch/s390/kernel/vdso64/Makefile:53: arch/s390/kernel/vdso64/vdso64.so.dbg] Error 1
> > make[1]: *** [arch/s390/Makefile:150: vdso_prepare] Error 2
> > make: *** [Makefile:248: __sub-make] Error 2
> > 
> > My linker can't do s390. So I need something else which your system has.
> 
> IIUC you can build with `LLVM=1` rather than `CC=clang` to force the use of
> LLD (which should support s390 even if you don't have a GNU LD that does).

I was just typing:

Nathan says:

"You need to supply CROSS_COMPILE=s390x-linux-gnu- or use LLVM=-19 to avoid the ld error."

:-)

> I have script to use the kernel.org GCC/LLVM builds from:
> 
>   https://www.kernel.org/pub/tools/crosstool/
>   https://cdn.kernel.org/pub/tools/llvm/
> 
> ... and I can reproduce this with:
> 
>   [mark@...rids:~/src/linux]% git clean -qfdx
>   [mark@...rids:~/src/linux]% usekorg-llvm 18.1.6 make LLVM=1 ARCH=s390 -s allmodconfig
>   [mark@...rids:~/src/linux]% usekorg-llvm 18.1.6 make LLVM=1 ARCH=s390 -s  
> 
> ... where that last step blows up with:
> 
> | init/main.c:972:6: error: unexpected token
> |   972 |         if (WARN(!irqs_disabled(),
> |       |             ^
> 
> ... plus a whole bucnh of other gunk.
> 
> I'll take a look, and hopefully Linus and Jinie can too.

Thanks.

It looks to me like that BUGVERBOSE stuff in tip/core/bugs and it warns
because core/entry starts using it when it gets merged to the rest of the tip
pile.

Lemme show it to Peter.

Thx.

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette