Hi Johannes, [auto build test ERROR on mac80211/master] [also build test ERROR on v4.3 next-20151106] url: https://github.com/0day-ci/linux/commits/Johannes-Berg/mac80211-remove-string-from-unaligned-packet-warning/20151106-190240 base: https://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211.git master config: xtensa-allyesconfig (attached as .config) reproduce: wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # save the attached .config to linux build tree make.cross ARCH=xtensa All error/warnings (new ones prefixed by >>): In file included from arch/xtensa/include/generated/asm/bug.h:1:0, from include/linux/bug.h:4, from include/linux/thread_info.h:11, from include/asm-generic/preempt.h:4, from arch/xtensa/include/generated/asm/preempt.h:1, from include/linux/preempt.h:59, from include/linux/spinlock.h:50, from include/linux/seqlock.h:35, from include/linux/time.h:5, from include/linux/jiffies.h:7, from net/mac80211/rx.c:13: net/mac80211/rx.c: In function 'ieee80211_verify_alignment': >> include/asm-generic/bug.h:74:72: error: expected expression before ')' token #define __WARN_printf(arg...) warn_slowpath_fmt(__FILE__, __LINE__, arg) ^ >> include/asm-generic/bug.h:97:3: note: in expansion of macro '__WARN_printf' __WARN_printf(format); \ ^ >> include/asm-generic/bug.h:124:7: note: in expansion of macro 'WARN' if (WARN(!__warned, format)) \ ^ >> net/mac80211/rx.c:664:2: note: in expansion of macro 'WARN_ONCE' WARN_ONCE((unsigned long)rx->skb->data & 1); ^ vim +/WARN_ONCE +664 net/mac80211/rx.c 648 * architecture doesn't support efficient unaligned operations, mac80211 649 * will align the data. 650 * 651 * With A-MSDU frames, however, the payload data address must yield two modulo 652 * four because there are 14-byte 802.3 headers within the A-MSDU frames that 653 * push the IP header further back to a multiple of four again. Thankfully, the 654 * specs were sane enough this time around to require padding each A-MSDU 655 * subframe to a length that is a multiple of four. 656 * 657 * Padding like Atheros hardware adds which is between the 802.11 header and 658 * the payload is not supported, the driver is required to move the 802.11 659 * header to be directly in front of the payload in that case. 660 */ 661 static void ieee80211_verify_alignment(struct ieee80211_rx_data *rx) 662 { 663 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG > 664 WARN_ONCE((unsigned long)rx->skb->data & 1); 665 #endif 666 } 667 668 669 /* rx handlers */ 670 671 static int ieee80211_is_unicast_robust_mgmt_frame(struct sk_buff *skb) 672 { --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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