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

From: Waiman Long
Date: Tue Aug 09 2016 - 15:46:58 EST


On 08/09/2016 02:23 PM, kbuild test robot wrote:
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: i386-randconfig-s0-201632 (attached as .config)
compiler: gcc-6 (Debian 6.1.1-9) 6.1.1 20160705
reproduce:
# save the attached .config to linux build tree
make ARCH=i386

All error/warnings (new ones prefixed by>>):

lib/dlock-list.c: In function 'cpu2list_init':
lib/dlock-list.c:60:15: error: assignment to expression with array type
sibling_mask = topology_sibling_cpumask(0);
^
lib/dlock-list.c:61:6: warning: the address of 'sibling_mask' will always evaluate as 'true' [-Waddress]
if (!sibling_mask)
^
lib/dlock-list.c:74:16: error: assignment to expression with array type
sibling_mask = topology_sibling_cpumask(cpu);
^

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);
64 if (nr_siblings == 1)

---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation

I have updated and re-sent patch 5 that should fix the non-SMP build error.

Cheers,
Longman