linux-kernel - Re: [paulmck-rcu:dev.2024.04.04b 59/65] controller.c:undefined reference to `cmpxchg_emu

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Date: Tue, 9 Apr 2024 08:56:05 -0700
From: "Paul E. McKenney" <paulmck@...nel.org>
To: kernel test robot <lkp@...el.com>
Cc: oe-kbuild-all@...ts.linux.dev, linux-kernel@...r.kernel.org
Subject: Re: [paulmck-rcu:dev.2024.04.04b 59/65] controller.c:undefined
 reference to `cmpxchg_emu_u8'

On Tue, Apr 09, 2024 at 02:44:49PM +0800, kernel test robot wrote:
> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git dev.2024.04.04b
> head:   e2a520f3f3921cb5d3c9631917fccf8c215991ce
> commit: 5ce37a62e3d207bd20d4c850c4547816c0dd9c22 [59/65] EXP arch/x86: Test one-byte cmpxchg emulation
> config: i386-buildonly-randconfig-006-20240409 (https://download.01.org/0day-ci/archive/20240409/202404091402.CYa0g4R6-lkp@intel.com/config)
> compiler: gcc-13 (Ubuntu 13.2.0-4ubuntu3) 13.2.0
> reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240409/202404091402.CYa0g4R6-lkp@intel.com/reproduce)
> 
> If you fix the issue in a separate patch/commit (i.e. not just a new version of
> the same patch/commit), kindly add following tags
> | Reported-by: kernel test robot <lkp@...el.com>
> | Closes: https://lore.kernel.org/oe-kbuild-all/202404091402.CYa0g4R6-lkp@intel.com/
> 
> All errors (new ones prefixed by >>):
> 
>    ld: drivers/platform/surface/aggregator/controller.o: in function `ssam_request_write_data':
> >> controller.c:(.text+0xcdf): undefined reference to `cmpxchg_emu_u8'

I believe that this is fixed in this updated version:

b8eb8a06afe1 ("EXP arch/x86: Test one-byte cmpxchg emulation")

But please let me know if I am missing something here.

							Thanx, Paul