netdev - Re: [PATCH net-next 2/2] net sched act_vlan: VLAN action rewrite to use RCU lock/unlock and update

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Message-ID: <201710290752.G27Wb3AP%fengguang.wu@intel.com>
Date:   Sun, 29 Oct 2017 07:22:48 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Manish Kurup <kurup.manish@...il.com>
Cc:     kbuild-all@...org, jhs@...atatu.com, xiyou.wangcong@...il.com,
        jiri@...nulli.us, davem@...emloft.net, netdev@...r.kernel.org,
        aring@...atatu.com, mrv@...atatu.com, kurup.manish@...il.com,
        Manish Kurup <manish.kurup@...izon.com>
Subject: Re: [PATCH net-next 2/2] net sched act_vlan: VLAN action rewrite to
 use RCU lock/unlock and update

Hi Manish,

Thank you for the patch! Yet we hit a small issue.
[auto build test WARNING on net-next/master]

url:    https://github.com/0day-ci/linux/commits/Manish-Kurup/net-sched-act_vlan-Change-stats-update-to-use-per-core-stats/20171029-053449
reproduce:
        # apt-get install sparse
        make ARCH=x86_64 allmodconfig
        make C=1 CF=-D__CHECK_ENDIAN__


sparse warnings: (new ones prefixed by >>)


vim +70 drivers/net/ethernet/netronome/nfp/flower/action.c

1a1e586f Pieter Jansen van Vuuren 2017-06-29  55  
1a1e586f Pieter Jansen van Vuuren 2017-06-29  56  static void
1a1e586f Pieter Jansen van Vuuren 2017-06-29  57  nfp_fl_push_vlan(struct nfp_fl_push_vlan *push_vlan,
1a1e586f Pieter Jansen van Vuuren 2017-06-29  58  		 const struct tc_action *action)
1a1e586f Pieter Jansen van Vuuren 2017-06-29  59  {
1a1e586f Pieter Jansen van Vuuren 2017-06-29  60  	size_t act_size = sizeof(struct nfp_fl_push_vlan);
1a1e586f Pieter Jansen van Vuuren 2017-06-29  61  	struct tcf_vlan *vlan = to_vlan(action);
1a1e586f Pieter Jansen van Vuuren 2017-06-29  62  	u16 tmp_push_vlan_tci;
1a1e586f Pieter Jansen van Vuuren 2017-06-29  63  
62d3f60b Pieter Jansen van Vuuren 2017-10-20  64  	push_vlan->head.jump_id = NFP_FL_ACTION_OPCODE_PUSH_VLAN;
62d3f60b Pieter Jansen van Vuuren 2017-10-20  65  	push_vlan->head.len_lw = act_size >> NFP_FL_LW_SIZ;
1a1e586f Pieter Jansen van Vuuren 2017-06-29  66  	push_vlan->reserved = 0;
1a1e586f Pieter Jansen van Vuuren 2017-06-29  67  	push_vlan->vlan_tpid = tcf_vlan_push_proto(action);
1a1e586f Pieter Jansen van Vuuren 2017-06-29  68  
1a1e586f Pieter Jansen van Vuuren 2017-06-29  69  	tmp_push_vlan_tci =
1a1e586f Pieter Jansen van Vuuren 2017-06-29 @70  		FIELD_PREP(NFP_FL_PUSH_VLAN_PRIO, vlan->tcfv_push_prio) |
1a1e586f Pieter Jansen van Vuuren 2017-06-29  71  		FIELD_PREP(NFP_FL_PUSH_VLAN_VID, vlan->tcfv_push_vid) |
1a1e586f Pieter Jansen van Vuuren 2017-06-29  72  		NFP_FL_PUSH_VLAN_CFI;
1a1e586f Pieter Jansen van Vuuren 2017-06-29  73  	push_vlan->vlan_tci = cpu_to_be16(tmp_push_vlan_tci);
1a1e586f Pieter Jansen van Vuuren 2017-06-29  74  }
1a1e586f Pieter Jansen van Vuuren 2017-06-29  75  

:::::: The code at line 70 was first introduced by commit
:::::: 1a1e586f54bfe54a0ba7ea0ac9b8c7b1d3e655f6 nfp: add basic action capabilities to flower offloads

:::::: TO: Pieter Jansen van Vuuren <pieter.jansenvanvuuren@...ronome.com>
:::::: CC: David S. Miller <davem@...emloft.net>

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