linux-kernel - Re: [PATCH v5 5/5] lib/dlock-list: Make sibling CPUs share the same linked list

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Date:	Wed, 10 Aug 2016 02:44:03 +0800
From:	kbuild test robot <lkp@...el.com>
To:	Waiman Long <Waiman.Long@....com>
Cc:	kbuild-all@...org, Alexander Viro <viro@...iv.linux.org.uk>,
	Jan Kara <jack@...e.com>,
	Jeff Layton <jlayton@...chiereds.net>,
	"J. Bruce Fields" <bfields@...ldses.org>,
	Tejun Heo <tj@...nel.org>,
	Christoph Lameter <cl@...ux-foundation.org>,
	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
	Ingo Molnar <mingo@...hat.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Andi Kleen <andi@...stfloor.org>,
	Dave Chinner <dchinner@...hat.com>,
	Boqun Feng <boqun.feng@...il.com>,
	Scott J Norton <scott.norton@....com>,
	Douglas Hatch <doug.hatch@....com>,
	Waiman Long <Waiman.Long@....com>
Subject: Re: [PATCH v5 5/5] lib/dlock-list: Make sibling CPUs share the same
 linked list

Hi Waiman,

[auto build test ERROR on linus/master]
[also build test ERROR on v4.8-rc1 next-20160809]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Waiman-Long/vfs-Use-dlock-list-for-SB-s-s_inodes-list/20160810-012457
config: x86_64-randconfig-s2-08100126 (attached as .config)
compiler: gcc-4.4 (Debian 4.4.7-8) 4.4.7
reproduce:
        # save the attached .config to linux build tree
        make ARCH=x86_64 

All errors (new ones prefixed by >>):

   lib/dlock-list.c: In function 'cpu2list_init':
>> lib/dlock-list.c:60: error: incompatible types when assigning to type 'cpumask_var_t' from type 'struct cpumask *'
   lib/dlock-list.c:61: warning: the address of 'sibling_mask' will always evaluate as 'true'
   lib/dlock-list.c:74: error: incompatible types when assigning to type 'cpumask_var_t' from type 'struct cpumask *'

vim +60 lib/dlock-list.c

    54		cpumask_var_t sibling_mask;
    55		static struct cpumask mask __initdata;
    56	
    57		/*
    58		 * Check # of sibling CPUs for CPU 0
    59		 */
  > 60		sibling_mask = topology_sibling_cpumask(0);
    61		if (!sibling_mask)
    62			goto done;
    63		nr_siblings = cpumask_weight(sibling_mask);

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