Hi Yuchung, [auto build test ERROR on net-next/master]
url: https://github.com/0day-ci/linux/commits/Neal-Cardwell/tcp-BBR-congestion-control-algorithm/20160917-025323 config: arm-nhk8815_defconfig (attached as .config) compiler: arm-linux-gnueabi-gcc (Debian 6.1.1-9) 6.1.1 20160705 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=arm All error/warnings (new ones prefixed by >>): In file included from arch/arm/include/asm/div64.h:126:0, from include/linux/kernel.h:142, from include/linux/crypto.h:21, from include/crypto/hash.h:16, from net/ipv4/tcp.c:250: net/ipv4/tcp.c: In function 'tcp_get_info': include/asm-generic/div64.h:207:28: warning: comparison of distinct pointer types lacks a cast (void)(((typeof((n)) *)0) == ((uint64_t *)0)); \ ^ >> net/ipv4/tcp.c:2794:3: note: in expansion of macro 'do_div' do_div(rate, intv); ^~~~~~ In file included from arch/arm/include/asm/atomic.h:14:0, from include/linux/atomic.h:4, from include/linux/crypto.h:20, from include/crypto/hash.h:16, from net/ipv4/tcp.c:250: include/asm-generic/div64.h:220:25: warning: right shift count >= width of type [-Wshift-count-overflow] } else if (likely(((n) >> 32) == 0)) { \ ^ include/linux/compiler.h:167:40: note: in definition of macro 'likely' # define likely(x) __builtin_expect(!!(x), 1) ^ >> net/ipv4/tcp.c:2794:3: note: in expansion of macro 'do_div' do_div(rate, intv); ^~~~~~ In file included from arch/arm/include/asm/div64.h:126:0, from include/linux/kernel.h:142, from include/linux/crypto.h:21, from include/crypto/hash.h:16, from net/ipv4/tcp.c:250: >> include/asm-generic/div64.h:224:22: error: passing argument 1 of >> '__div64_32' from incompatible pointer type >> [-Werror=incompatible-pointer-types] __rem = __div64_32(&(n), __base); \ ^ >> net/ipv4/tcp.c:2794:3: note: in expansion of macro 'do_div' do_div(rate, intv); ^~~~~~ In file included from include/linux/kernel.h:142:0, from include/linux/crypto.h:21, from include/crypto/hash.h:16, from net/ipv4/tcp.c:250: arch/arm/include/asm/div64.h:32:24: note: expected 'uint64_t * {aka long long unsigned int *}' but argument is of type 'u32 * {aka unsigned int *}' static inline uint32_t __div64_32(uint64_t *n, uint32_t base) ^~~~~~~~~~ cc1: some warnings being treated as errors vim +/do_div +2794 net/ipv4/tcp.c 2778 } while (u64_stats_fetch_retry_irq(&tp->syncp, start)); 2779 info->tcpi_segs_out = tp->segs_out; 2780 info->tcpi_segs_in = tp->segs_in; 2781 2782 notsent_bytes = READ_ONCE(tp->write_seq) - READ_ONCE(tp->snd_nxt); 2783 info->tcpi_notsent_bytes = max(0, notsent_bytes); 2784 2785 info->tcpi_min_rtt = tcp_min_rtt(tp); 2786 info->tcpi_data_segs_in = tp->data_segs_in; 2787 info->tcpi_data_segs_out = tp->data_segs_out; 2788 2789 info->tcpi_delivery_rate_app_limited = tp->rate_app_limited ? 1 : 0; 2790 rate = READ_ONCE(tp->rate_delivered); 2791 intv = READ_ONCE(tp->rate_interval_us); 2792 if (rate && intv) { 2793 rate = rate * tp->mss_cache * USEC_PER_SEC; > 2794 do_div(rate, intv); 2795 put_unaligned(rate, &info->tcpi_delivery_rate); 2796 } 2797 } 2798 EXPORT_SYMBOL_GPL(tcp_get_info); 2799 2800 static int do_tcp_getsockopt(struct sock *sk, int level, 2801 int optname, char __user *optval, int __user *optlen) 2802 { --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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