netdev - Re: [PATCH net-next 2/4] net: move net_cookie into net_aligned

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Message-ID: <202506290617.ImmLRhZL-lkp@intel.com>
Date: Sun, 29 Jun 2025 04:19:23 +0800
From: kernel test robot <lkp@...el.com>
To: Eric Dumazet <edumazet@...gle.com>,
	"David S . Miller" <davem@...emloft.net>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>
Cc: oe-kbuild-all@...ts.linux.dev, Simon Horman <horms@...nel.org>,
	Willem de Bruijn <willemb@...gle.com>, netdev@...r.kernel.org,
	eric.dumazet@...il.com, Eric Dumazet <edumazet@...gle.com>
Subject: Re: [PATCH net-next 2/4] net: move net_cookie into net_aligned_data

Hi Eric,

kernel test robot noticed the following build errors:

[auto build test ERROR on net-next/main]

url:    https://github.com/intel-lab-lkp/linux/commits/Eric-Dumazet/net-add-struct-net_aligned_data/20250628-040753
base:   net-next/main
patch link:    https://lore.kernel.org/r/20250627200551.348096-3-edumazet%40google.com
patch subject: [PATCH net-next 2/4] net: move net_cookie into net_aligned_data
config: riscv-randconfig-002-20250629 (https://download.01.org/0day-ci/archive/20250629/202506290617.ImmLRhZL-lkp@intel.com/config)
compiler: riscv32-linux-gcc (GCC) 13.3.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250629/202506290617.ImmLRhZL-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/202506290617.ImmLRhZL-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from net/core/hotdata.c:5:
>> include/net/aligned_data.h:12:9: error: unknown type name 'atomic64_t'
      12 |         atomic64_t      net_cookie ____cacheline_aligned_in_smp;
         |         ^~~~~~~~~~


vim +/atomic64_t +12 include/net/aligned_data.h

     6	
     7	/* Structure holding cacheline aligned fields on SMP builds.
     8	 * Each field or group should have an ____cacheline_aligned_in_smp
     9	 * attribute to ensure no accidental false sharing can happen.
    10	 */
    11	struct net_aligned_data {
  > 12		atomic64_t	net_cookie ____cacheline_aligned_in_smp;
    13	};
    14	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki