Hello Greg, the k-build robot found this sparse problem, triggered by building a CAN driver for m68k. Is this a problem in our CAN driver or in the m68k headers?
Marc On 6/12/20 7:28 AM, kernel test robot wrote: > tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git > master > head: b791d1bdf9212d944d749a5c7ff6febdba241771 > commit: 26ad340e582d3d5958ed8456a1911d79cfb567b4 can: kvaser_pciefd: Add > driver for Kvaser PCIEcan devices > date: 11 months ago > config: m68k-randconfig-s032-20200612 (attached as .config) > compiler: m68k-linux-gcc (GCC) 9.3.0 > reproduce: > # apt-get install sparse > # sparse version: v0.6.1-250-g42323db3-dirty > git checkout 26ad340e582d3d5958ed8456a1911d79cfb567b4 > # save the attached .config to linux build tree > make W=1 C=1 ARCH=m68k CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' > > If you fix the issue, kindly add following tag as appropriate > Reported-by: kernel test robot <l...@intel.com> > > > sparse warnings: (new ones prefixed by >>) > >>> drivers/net/can/kvaser_pciefd.c:801:17: sparse: sparse: cast removes >>> address space '<asn:2>' of expression > drivers/net/can/kvaser_pciefd.c:805:17: sparse: sparse: cast removes > address space '<asn:2>' of expression > arch/m68k/include/asm/io_no.h:77:24: sparse: sparse: cast removes address > space '<asn:2>' of expression > arch/m68k/include/asm/io_no.h:78:16: sparse: sparse: cast removes address > space '<asn:2>' of expression > arch/m68k/include/asm/io_no.h:78:16: sparse: sparse: cast to restricted > __le32 > arch/m68k/include/asm/io_no.h:78:16: sparse: sparse: cast removes address > space '<asn:2>' of expression > arch/m68k/include/asm/io_no.h:78:16: sparse: sparse: cast to restricted > __le32 > arch/m68k/include/asm/io_no.h:78:16: sparse: sparse: cast removes address > space '<asn:2>' of expression > arch/m68k/include/asm/io_no.h:78:16: sparse: sparse: cast to restricted > __le32 > arch/m68k/include/asm/io_no.h:78:16: sparse: sparse: cast removes address > space '<asn:2>' of expression > arch/m68k/include/asm/io_no.h:78:16: sparse: sparse: cast to restricted > __le32 > arch/m68k/include/asm/io_no.h:78:16: sparse: sparse: cast removes address > space '<asn:2>' of expression > arch/m68k/include/asm/io_no.h:78:16: sparse: sparse: cast to restricted > __le32 > arch/m68k/include/asm/io_no.h:78:16: sparse: sparse: cast removes address > space '<asn:2>' of expression > arch/m68k/include/asm/io_no.h:78:16: sparse: sparse: cast to restricted > __le32 > arch/m68k/include/asm/io_no.h:77:24: sparse: sparse: cast removes address > space '<asn:2>' of expression > arch/m68k/include/asm/io_no.h:78:16: sparse: sparse: cast removes address > space '<asn:2>' of expression > arch/m68k/include/asm/io_no.h:78:16: sparse: sparse: cast to restricted > __le32 > arch/m68k/include/asm/io_no.h:78:16: sparse: sparse: cast removes address > space '<asn:2>' of expression > arch/m68k/include/asm/io_no.h:78:16: sparse: sparse: cast to restricted > __le32 > arch/m68k/include/asm/io_no.h:78:16: sparse: sparse: cast removes address > space '<asn:2>' of expression > arch/m68k/include/asm/io_no.h:78:16: sparse: sparse: cast to restricted > __le32 > arch/m68k/include/asm/io_no.h:78:16: sparse: sparse: cast removes address > space '<asn:2>' of expression > arch/m68k/include/asm/io_no.h:78:16: sparse: sparse: cast to restricted > __le32 > arch/m68k/include/asm/io_no.h:78:16: sparse: sparse: cast removes address > space '<asn:2>' of expression > arch/m68k/include/asm/io_no.h:78:16: sparse: sparse: cast to restricted > __le32 > arch/m68k/include/asm/io_no.h:78:16: sparse: sparse: cast removes address > space '<asn:2>' of expression > arch/m68k/include/asm/io_no.h:78:16: sparse: sparse: cast to restricted > __le32 > arch/m68k/include/asm/io_no.h:77:24: sparse: sparse: cast removes address > space '<asn:2>' of expression > arch/m68k/include/asm/io_no.h:78:16: sparse: sparse: cast removes address > space '<asn:2>' of expression > arch/m68k/include/asm/io_no.h:78:16: sparse: sparse: cast to restricted > __le32 > arch/m68k/include/asm/io_no.h:78:16: sparse: sparse: cast removes address > space '<asn:2>' of expression > arch/m68k/include/asm/io_no.h:78:16: sparse: sparse: cast to restricted > __le32 > arch/m68k/include/asm/io_no.h:78:16: sparse: sparse: cast removes address > space '<asn:2>' of expression > arch/m68k/include/asm/io_no.h:78:16: sparse: sparse: cast to restricted > __le32 > arch/m68k/include/asm/io_no.h:78:16: sparse: sparse: cast removes address > space '<asn:2>' of expression > arch/m68k/include/asm/io_no.h:78:16: sparse: sparse: cast to restricted > __le32 > arch/m68k/include/asm/io_no.h:78:16: sparse: sparse: cast removes address > space '<asn:2>' of expression > arch/m68k/include/asm/io_no.h:78:16: sparse: sparse: cast to restricted > __le32 > arch/m68k/include/asm/io_no.h:78:16: sparse: sparse: cast removes address > space '<asn:2>' of expression > arch/m68k/include/asm/io_no.h:78:16: sparse: sparse: cast to restricted > __le32 > arch/m68k/include/asm/io_no.h:77:24: sparse: sparse: cast removes address > space '<asn:2>' of expression > arch/m68k/include/asm/io_no.h:78:16: sparse: sparse: cast removes address > space '<asn:2>' of expression > arch/m68k/include/asm/io_no.h:78:16: sparse: sparse: cast to restricted > __le32 > arch/m68k/include/asm/io_no.h:78:16: sparse: sparse: cast removes address > space '<asn:2>' of expression > arch/m68k/include/asm/io_no.h:78:16: sparse: sparse: cast to restricted > __le32 > arch/m68k/include/asm/io_no.h:78:16: sparse: sparse: cast removes address > space '<asn:2>' of expression > arch/m68k/include/asm/io_no.h:78:16: sparse: sparse: cast to restricted > __le32 > arch/m68k/include/asm/io_no.h:78:16: sparse: sparse: cast removes address > space '<asn:2>' of expression > arch/m68k/include/asm/io_no.h:78:16: sparse: sparse: cast to restricted > __le32 > arch/m68k/include/asm/io_no.h:78:16: sparse: sparse: cast removes address > space '<asn:2>' of expression > arch/m68k/include/asm/io_no.h:78:16: sparse: sparse: cast to restricted > __le32 > arch/m68k/include/asm/io_no.h:78:16: sparse: sparse: cast removes address > space '<asn:2>' of expression > arch/m68k/include/asm/io_no.h:78:16: sparse: sparse: cast to restricted > __le32 > > vim +801 drivers/net/can/kvaser_pciefd.c > > 764 > 765 static netdev_tx_t kvaser_pciefd_start_xmit(struct sk_buff *skb, > 766 struct net_device > *netdev) > 767 { > 768 struct kvaser_pciefd_can *can = netdev_priv(netdev); > 769 unsigned long irq_flags; > 770 struct kvaser_pciefd_tx_packet packet; > 771 int nwords; > 772 u8 count; > 773 > 774 if (can_dropped_invalid_skb(netdev, skb)) > 775 return NETDEV_TX_OK; > 776 > 777 nwords = kvaser_pciefd_prepare_tx_packet(&packet, can, > skb); > 778 > 779 spin_lock_irqsave(&can->echo_lock, irq_flags); > 780 > 781 /* Prepare and save echo skb in internal slot */ > 782 can_put_echo_skb(skb, netdev, can->echo_idx); > 783 > 784 /* Move echo index to the next slot */ > 785 can->echo_idx = (can->echo_idx + 1) % > can->can.echo_skb_max; > 786 > 787 /* Write header to fifo */ > 788 iowrite32(packet.header[0], > 789 can->reg_base + KVASER_PCIEFD_KCAN_FIFO_REG); > 790 iowrite32(packet.header[1], > 791 can->reg_base + KVASER_PCIEFD_KCAN_FIFO_REG); > 792 > 793 if (nwords) { > 794 u32 data_last = ((u32 *)packet.data)[nwords - > 1]; > 795 > 796 /* Write data to fifo, except last word */ > 797 iowrite32_rep(can->reg_base + > 798 KVASER_PCIEFD_KCAN_FIFO_REG, > packet.data, > 799 nwords - 1); > 800 /* Write last word to end of fifo */ > > 801 __raw_writel(data_last, can->reg_base + > 802 KVASER_PCIEFD_KCAN_FIFO_LAST_REG); > 803 } else { > 804 /* Complete write to fifo */ > 805 __raw_writel(0, can->reg_base + > 806 KVASER_PCIEFD_KCAN_FIFO_LAST_REG); > 807 } > 808 > 809 count = ioread32(can->reg_base + > KVASER_PCIEFD_KCAN_TX_NPACKETS_REG); > 810 /* No room for a new message, stop the queue until at > least one > 811 * successful transmit > 812 */ > 813 if (count >= KVASER_PCIEFD_CAN_TX_MAX_COUNT || > 814 can->can.echo_skb[can->echo_idx]) > 815 netif_stop_queue(netdev); > 816 > 817 spin_unlock_irqrestore(&can->echo_lock, irq_flags); > 818 > 819 return NETDEV_TX_OK; > 820 } > 821 > > --- > 0-DAY CI Kernel Test Service, Intel Corporation > https://lists.01.org/hyperkitty/list/kbuild-...@lists.01.org > -- Pengutronix e.K. | Marc Kleine-Budde | Embedded Linux | https://www.pengutronix.de | Vertretung West/Dortmund | Phone: +49-231-2826-924 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |
