netdev - Re: [PATCH net-next 13/14] gtp: Support for GRO

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Date:   Tue, 19 Sep 2017 19:57:46 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Tom Herbert <tom@...ntonium.net>
Cc:     kbuild-all@...org, davem@...emloft.net, netdev@...r.kernel.org,
        pablo@...filter.org, laforge@...monks.org, rohit@...ntonium.net,
        Tom Herbert <tom@...ntonium.net>
Subject: Re: [PATCH net-next 13/14] gtp: Support for GRO

Hi Tom,

[auto build test WARNING on net-next/master]

url:    https://github.com/0day-ci/linux/commits/Tom-Herbert/gtp-Additional-feature-support/20170919-143920
reproduce:
        # apt-get install sparse
        make ARCH=x86_64 allmodconfig
        make C=1 CF=-D__CHECK_ENDIAN__


sparse warnings: (new ones prefixed by >>)


vim +3958 include/linux/netdevice.h

5b33bc6e Tom Herbert 2017-09-18  3944  
5b33bc6e Tom Herbert 2017-09-18  3945  /* rcu_read_lock() must be held */
5b33bc6e Tom Herbert 2017-09-18  3946  static inline struct skb_gso_app *skb_gso_app_lookup(struct sk_buff *skb,
5b33bc6e Tom Herbert 2017-09-18  3947  						     netdev_features_t features,
5b33bc6e Tom Herbert 2017-09-18  3948  						     unsigned int check_flags)
5b33bc6e Tom Herbert 2017-09-18  3949  {
5b33bc6e Tom Herbert 2017-09-18  3950  	struct skb_gso_app *app;
5b33bc6e Tom Herbert 2017-09-18  3951  	int type;
5b33bc6e Tom Herbert 2017-09-18  3952  
5b33bc6e Tom Herbert 2017-09-18  3953  	if (!(skb_shinfo(skb)->gso_type & SKB_GSO_APP_MASK))
5b33bc6e Tom Herbert 2017-09-18  3954  		return false;
5b33bc6e Tom Herbert 2017-09-18  3955  
5b33bc6e Tom Herbert 2017-09-18  3956  	type = skb_gso_app_to_index(skb_shinfo(skb)->gso_type);
5b33bc6e Tom Herbert 2017-09-18  3957  
5b33bc6e Tom Herbert 2017-09-18 @3958  	app = rcu_dereference(skb_gso_apps[type]);
5b33bc6e Tom Herbert 2017-09-18  3959  	if (app && app->gso_segment &&
5b33bc6e Tom Herbert 2017-09-18  3960  	    (check_flags & app->check_flags))
5b33bc6e Tom Herbert 2017-09-18  3961  		return app;
5b33bc6e Tom Herbert 2017-09-18  3962  
5b33bc6e Tom Herbert 2017-09-18  3963  	return NULL;
5b33bc6e Tom Herbert 2017-09-18  3964  }
5b33bc6e Tom Herbert 2017-09-18  3965  

:::::: The code at line 3958 was first introduced by commit
:::::: 5b33bc6e4fcae1113167c651a3d3a218c7e277c6 net: Add a facility to support application defined GSO

:::::: TO: Tom Herbert <tom@...ntonium.net>
:::::: CC: 0day robot <fengguang.wu@...el.com>

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