tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: 2646738520338211e74394857e36df7c455a8a91 commit: b0c05fe8eccb85a4dc80da0eb11a4d58b8ab912e [5981/6698] init/Kconfig: enable -O3 for all arches config: i386-randconfig-g002-20200109 (attached as .config) compiler: gcc-7 (Debian 7.5.0-3) 7.5.0 reproduce: git checkout b0c05fe8eccb85a4dc80da0eb11a4d58b8ab912e # save the attached .config to linux build tree make ARCH=i386 If you fix the issue, kindly add following tag Reported-by: kbuild test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): In file included from arch/x86/include/asm/string.h:3:0, from include/linux/string.h:20, from arch/x86/include/asm/page_32.h:35, from arch/x86/include/asm/page.h:14, from arch/x86/include/asm/thread_info.h:12, from include/linux/thread_info.h:38, from arch/x86/include/asm/preempt.h:7, from include/linux/preempt.h:78, from include/linux/spinlock.h:51, from include/linux/seqlock.h:36, from include/linux/time.h:6, from include/linux/ktime.h:24, from include/linux/timer.h:6, from include/linux/netdevice.h:24, from net/wireless/wext-core.c:11: net/wireless/wext-core.c: In function 'wext_handle_ioctl': arch/x86/include/asm/string_32.h:182:25: warning: argument 1 null where non-null expected [-Wnonnull] #define memcpy(t, f, n) __builtin_memcpy(t, f, n) ^~~~~~~~~~~~~~~~~~~~~~~~~ >> net/wireless/wext-core.c:671:3: note: in expansion of macro 'memcpy' memcpy(extra, stats, sizeof(struct iw_statistics)); ^~~~~~ arch/x86/include/asm/string_32.h:182:25: note: in a call to built-in function '__builtin_memcpy' #define memcpy(t, f, n) __builtin_memcpy(t, f, n) ^~~~~~~~~~~~~~~~~~~~~~~~~ >> net/wireless/wext-core.c:671:3: note: in expansion of macro 'memcpy' memcpy(extra, stats, sizeof(struct iw_statistics)); ^~~~~~ vim +/memcpy +671 net/wireless/wext-core.c 881d966b48b035 net/wireless/wext.c Eric W. Biederman 2007-09-17 659 3d23e349d80717 net/wireless/wext-core.c Johannes Berg 2009-09-29 660 static int iw_handler_get_iwstats(struct net_device * dev, 3d23e349d80717 net/wireless/wext-core.c Johannes Berg 2009-09-29 661 struct iw_request_info * info, 3d23e349d80717 net/wireless/wext-core.c Johannes Berg 2009-09-29 662 union iwreq_data * wrqu, 3d23e349d80717 net/wireless/wext-core.c Johannes Berg 2009-09-29 663 char * extra) 881d966b48b035 net/wireless/wext.c Eric W. Biederman 2007-09-17 664 { 3d23e349d80717 net/wireless/wext-core.c Johannes Berg 2009-09-29 665 /* Get stats from the driver */ 3d23e349d80717 net/wireless/wext-core.c Johannes Berg 2009-09-29 666 struct iw_statistics *stats; 3d23e349d80717 net/wireless/wext-core.c Johannes Berg 2009-09-29 667 3d23e349d80717 net/wireless/wext-core.c Johannes Berg 2009-09-29 668 stats = get_wireless_stats(dev); 3d23e349d80717 net/wireless/wext-core.c Johannes Berg 2009-09-29 669 if (stats) { 3d23e349d80717 net/wireless/wext-core.c Johannes Berg 2009-09-29 670 /* Copy statistics to extra */ 3d23e349d80717 net/wireless/wext-core.c Johannes Berg 2009-09-29 @671 memcpy(extra, stats, sizeof(struct iw_statistics)); 3d23e349d80717 net/wireless/wext-core.c Johannes Berg 2009-09-29 672 wrqu->data.length = sizeof(struct iw_statistics); 3d23e349d80717 net/wireless/wext-core.c Johannes Berg 2009-09-29 673 3d23e349d80717 net/wireless/wext-core.c Johannes Berg 2009-09-29 674 /* Check if we need to clear the updated flag */ 3d23e349d80717 net/wireless/wext-core.c Johannes Berg 2009-09-29 675 if (wrqu->data.flags != 0) 3d23e349d80717 net/wireless/wext-core.c Johannes Berg 2009-09-29 676 stats->qual.updated &= ~IW_QUAL_ALL_UPDATED; 3d23e349d80717 net/wireless/wext-core.c Johannes Berg 2009-09-29 677 return 0; 3d23e349d80717 net/wireless/wext-core.c Johannes Berg 2009-09-29 678 } else 3d23e349d80717 net/wireless/wext-core.c Johannes Berg 2009-09-29 679 return -EOPNOTSUPP; 881d966b48b035 net/wireless/wext.c Eric W. Biederman 2007-09-17 680 } ^1da177e4c3f41 net/core/wireless.c Linus Torvalds 2005-04-16 681 :::::: The code at line 671 was first introduced by commit :::::: 3d23e349d807177eaf519d444677cee86b1a04cf wext: refactor :::::: TO: Johannes Berg <johannes@xxxxxxxxxxxxxxxx> :::::: CC: John W. Linville <linville@xxxxxxxxxxxxx> --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx Intel Corporation
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