linux-kernel - Re: [PATCH] net: use kvmalloc rather than open coded variant

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Message-ID: <201701071152.Do5cZJAt%fengguang.wu@intel.com>
Date:   Sat, 7 Jan 2017 11:33:15 +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: use kvmalloc rather than open coded variant

Hi Michal,

[auto build test ERROR on net-next/master]
[also build test ERROR on v4.10-rc2 next-20170106]
[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-use-kvmalloc-rather-than-open-coded-variant/20170107-104105
config: x86_64-randconfig-i0-201701 (attached as .config)
compiler: gcc-4.9 (Debian 4.9.4-2) 4.9.4
reproduce:
        # save the attached .config to linux build tree
        make ARCH=x86_64 

Note: the linux-review/Michal-Hocko/net-use-kvmalloc-rather-than-open-coded-variant/20170107-104105 HEAD 29df6a817f53555953b47c6f8d09397f9f7b598c builds fine.
      It only hurts bisectibility.

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

   net/core/dev.c: In function 'netif_alloc_rx_queues':
>> net/core/dev.c:7114:2: error: implicit declaration of function 'kvzalloc' [-Werror=implicit-function-declaration]
     rx = kvzalloc(sz, GFP_KERNEL | __GFP_REPEAT);
     ^
>> net/core/dev.c:7114:5: warning: assignment makes pointer from integer without a cast
     rx = kvzalloc(sz, GFP_KERNEL | __GFP_REPEAT);
        ^
   net/core/dev.c: In function 'netif_alloc_netdev_queues':
   net/core/dev.c:7154:5: warning: assignment makes pointer from integer without a cast
     tx = kvzalloc(sz, GFP_KERNEL | __GFP_REPEAT);
        ^
   net/core/dev.c: In function 'alloc_netdev_mqs':
   net/core/dev.c:7690:4: warning: assignment makes pointer from integer without a cast
     p = kvzalloc(alloc_size, GFP_KERNEL | __GFP_REPEAT);
       ^
   cc1: some warnings being treated as errors

vim +/kvzalloc +7114 net/core/dev.c

  7108		unsigned int i, count = dev->num_rx_queues;
  7109		struct netdev_rx_queue *rx;
  7110		size_t sz = count * sizeof(*rx);
  7111	
  7112		BUG_ON(count < 1);
  7113	
> 7114		rx = kvzalloc(sz, GFP_KERNEL | __GFP_REPEAT);
  7115		if (!rx)
  7116			return -ENOMEM;
  7117	

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

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