linux-kernel - Re: [PATCH] net_sched: use kvmalloc rather than opencoded variant

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Message-ID: <201701150720.coxUa02H%fengguang.wu@intel.com>
Date:   Sun, 15 Jan 2017 07:43:01 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Michal Hocko <mhocko@...nel.org>
Cc:     kbuild-all@...org, Eric Dumazet <edumazet@...gle.com>,
        linux-mm@...ck.org, LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] net_sched: use kvmalloc rather than opencoded variant

Hi Michal,

[auto build test ERROR on net-next/master]
[also build test ERROR on v4.10-rc3 next-20170113]
[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/Michal-Hocko/net_sched-use-kvmalloc-rather-than-opencoded-variant/20170107-120926
config: i386-randconfig-h1-01150559 (attached as .config)
compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901
reproduce:
        # save the attached .config to linux build tree
        make ARCH=i386 

All errors (new ones prefixed by >>):

   net/sched/sch_fq.c: In function 'fq_resize':
>> net/sched/sch_fq.c:643:10: error: implicit declaration of function 'kvmalloc_node' [-Werror=implicit-function-declaration]
     array = kvmalloc_node(sizeof(struct rb_root) << log, GFP_KERNEL | __GFP_REPEAT,
             ^~~~~~~~~~~~~
   net/sched/sch_fq.c:643:8: warning: assignment makes pointer from integer without a cast [-Wint-conversion]
     array = kvmalloc_node(sizeof(struct rb_root) << log, GFP_KERNEL | __GFP_REPEAT,
           ^
   cc1: some warnings being treated as errors

vim +/kvmalloc_node +643 net/sched/sch_fq.c

   637		u32 idx;
   638	
   639		if (q->fq_root && log == q->fq_trees_log)
   640			return 0;
   641	
   642		/* If XPS was setup, we can allocate memory on right NUMA node */
 > 643		array = kvmalloc_node(sizeof(struct rb_root) << log, GFP_KERNEL | __GFP_REPEAT,
   644				      netdev_queue_numa_node_read(sch->dev_queue));
   645		if (!array)
   646			return -ENOMEM;

---
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