Hi Nathan, [auto build test WARNING on net-next/master]
url: https://github.com/0day-ci/linux/commits/Nathan-Fontenot/ibmvnic-Updated-reset-handler-and-code-fixes/20170430-004245 config: powerpc-allmodconfig (attached as .config) compiler: powerpc64-linux-gnu-gcc (Debian 6.1.1-9) 6.1.1 20160705 reproduce: wget https://raw.githubusercontent.com/01org/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # save the attached .config to linux build tree make.cross ARCH=powerpc Note: it may well be a FALSE warning. FWIW you are at least aware of it now. http://gcc.gnu.org/wiki/Better_Uninitialized_Warnings All warnings (new ones prefixed by >>): In file included from include/linux/if_ether.h:23:0, from include/uapi/linux/ethtool.h:18, from include/linux/ethtool.h:17, from include/linux/netdevice.h:42, from drivers/net//ethernet/ibm/ibmvnic.c:54: drivers/net//ethernet/ibm/ibmvnic.c: In function 'ibmvnic_interrupt_tx': >> include/linux/skbuff.h:3689:12: warning: 'skb' may be used uninitialized in >> this function [-Wmaybe-uninitialized] return skb->queue_mapping; ~~~^~~~~~~~~~~~~~~ drivers/net//ethernet/ibm/ibmvnic.c:1779:18: note: 'skb' was declared here struct sk_buff *skb; ^~~ -- In file included from include/linux/if_ether.h:23:0, from include/uapi/linux/ethtool.h:18, from include/linux/ethtool.h:17, from include/linux/netdevice.h:42, from drivers/net/ethernet/ibm/ibmvnic.c:54: drivers/net/ethernet/ibm/ibmvnic.c: In function 'ibmvnic_interrupt_tx': >> include/linux/skbuff.h:3689:12: warning: 'skb' may be used uninitialized in >> this function [-Wmaybe-uninitialized] return skb->queue_mapping; ~~~^~~~~~~~~~~~~~~ drivers/net/ethernet/ibm/ibmvnic.c:1779:18: note: 'skb' was declared here struct sk_buff *skb; ^~~ vim +/skb +3689 include/linux/skbuff.h 574f7194 Eric W. Biederman 2014-04-01 3673 return !skb->destructor && 574f7194 Eric W. Biederman 2014-04-01 3674 #if IS_ENABLED(CONFIG_XFRM) 574f7194 Eric W. Biederman 2014-04-01 3675 !skb->sp && 574f7194 Eric W. Biederman 2014-04-01 3676 #endif cb9c6836 Florian Westphal 2017-01-23 3677 !skb_nfct(skb) && 574f7194 Eric W. Biederman 2014-04-01 3678 !skb->_skb_refdst && 574f7194 Eric W. Biederman 2014-04-01 3679 !skb_has_frag_list(skb); 574f7194 Eric W. Biederman 2014-04-01 3680 } 574f7194 Eric W. Biederman 2014-04-01 3681 f25f4e44 Peter P Waskiewicz Jr 2007-07-06 3682 static inline void skb_set_queue_mapping(struct sk_buff *skb, u16 queue_mapping) f25f4e44 Peter P Waskiewicz Jr 2007-07-06 3683 { f25f4e44 Peter P Waskiewicz Jr 2007-07-06 3684 skb->queue_mapping = queue_mapping; f25f4e44 Peter P Waskiewicz Jr 2007-07-06 3685 } f25f4e44 Peter P Waskiewicz Jr 2007-07-06 3686 9247744e Stephen Hemminger 2009-03-21 3687 static inline u16 skb_get_queue_mapping(const struct sk_buff *skb) 4e3ab47a Pavel Emelyanov 2007-10-21 3688 { 4e3ab47a Pavel Emelyanov 2007-10-21 @3689 return skb->queue_mapping; 4e3ab47a Pavel Emelyanov 2007-10-21 3690 } 4e3ab47a Pavel Emelyanov 2007-10-21 3691 f25f4e44 Peter P Waskiewicz Jr 2007-07-06 3692 static inline void skb_copy_queue_mapping(struct sk_buff *to, const struct sk_buff *from) f25f4e44 Peter P Waskiewicz Jr 2007-07-06 3693 { f25f4e44 Peter P Waskiewicz Jr 2007-07-06 3694 to->queue_mapping = from->queue_mapping; f25f4e44 Peter P Waskiewicz Jr 2007-07-06 3695 } f25f4e44 Peter P Waskiewicz Jr 2007-07-06 3696 d5a9e24a David S. Miller 2009-01-27 3697 static inline void skb_record_rx_queue(struct sk_buff *skb, u16 rx_queue) :::::: The code at line 3689 was first introduced by commit :::::: 4e3ab47a547616e583c7a5458beced6aa34c8ef3 [NET]: Make and use skb_get_queue_mapping :::::: TO: Pavel Emelyanov <xe...@openvz.org> :::::: CC: David S. Miller <da...@sunset.davemloft.net> --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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