linux-kernel - Re: [PATCH v2 1/1] phy: tusb1210: use bitmasks to set VENDOR

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Message-Id: <C4A102A7YC2W.1LPN6MZLYYUKV@atris>
Date:   Sat, 18 Jul 2020 16:18:25 -0400
From:   "Liam Beguin" <liambeguin@...il.com>
To:     "kernel test robot" <lkp@...el.com>, <kishon@...com>,
        <vkoul@...nel.org>
Cc:     <kbuild-all@...ts.01.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 1/1] phy: tusb1210: use bitmasks to set
 VENDOR_SPECIFIC2

On Wed Jul 15, 2020 at 7:48 AM kernel test robot wrote:
> Hi Liam,
> 
> Thank you for the patch! Yet something to improve:
> 
> [auto build test ERROR on 8f3d9f354286745c751374f5f1fcafee6b3f3136]
> 
> url:    https://github.com/0day-ci/linux/commits/Liam-Beguin/phy-tusb1210-use-bitmasks-to-set-VENDOR_SPECIFIC2/20200715-003517
> base:    8f3d9f354286745c751374f5f1fcafee6b3f3136
> config: parisc-allyesconfig (attached as .config)
> compiler: hppa-linux-gcc (GCC) 9.3.0
> reproduce (this is a W=1 build):
>         wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
>         chmod +x ~/bin/make.cross
>         # save the attached .config to linux build tree
>         COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=parisc 
> 
> If you fix the issue, kindly add following tag as appropriate
> Reported-by: kernel test robot <lkp@...el.com>
> 
> All errors (new ones prefixed by >>):
> 
>    hppa-linux-ld: drivers/phy/ti/phy-tusb1210.o: in function `tusb1210_probe':
> >> (.text+0x2f4): undefined reference to `__cmpxchg_called_with_bad_pointer'
> >> hppa-linux-ld: (.text+0x324): undefined reference to `__cmpxchg_called_with_bad_pointer'
>    hppa-linux-ld: (.text+0x354): undefined reference to `__cmpxchg_called_with_bad_pointer'
> 

Hi,

I sent another patch[1] to try to address this.

The issue seems to come from the fact that the parisc architecture
doesn't support cmpxchg on u8 pointers. cmpxchg is called by
set_mask_bits.

Thanks,
Liam

[1] https://lore.kernel.org/patchwork/patch/1272617/

> ---
> 0-DAY CI Kernel Test Service, Intel Corporation
> https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org