Re: [PATCH net] rhashtable: avoid large lock-array allocations

kbuild test robot [off-list ref] wrote:

Hi Florian,

[auto build test WARNING on net/master]

url:    https://github.com/0day-ci/linux/commits/Florian-Westphal/rhashtable-avoid-large-lock-array-allocations/20160812-101458
config: x86_64-randconfig-x015-201632 (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=x86_64 

All warnings (new ones prefixed by >>):

   In file included from lib/rhashtable.c:18:0:
   lib/rhashtable.c: In function 'rhashtable_init':

quoted

quoted

lib/rhashtable.c:34:30: warning: division by zero [-Wdiv-by-zero]

              2 * L1_CACHE_BYTES / sizeof(spinlock_t), 1)

I will send a v2 tomorrow, perhaps its better to just go for
32UL instead of this construct after all.