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depmod: WARNING: vboxpci.ko needs unknown symbol iommu_iova_
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x220tux
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Joined: 09 Apr 2015
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PostPosted: Sun Oct 11, 2015 12:27 pm    Post subject: depmod: WARNING: vboxpci.ko needs unknown symbol iommu_iova_ Reply with quote

I changed some kernel options and re-compile current kernel 4.0.5.

Code:
make -j5
make modules_install
will generate DEPMOD Warning like this:
Code:
make modules_install
  INSTALL arch/x86/crypto/aes-x86_64.ko
  INSTALL crypto/cmac.ko
  INSTALL crypto/deflate.ko
  INSTALL crypto/ecb.ko
  INSTALL crypto/sha256_generic.ko
  INSTALL drivers/acpi/acpi_pad.ko
  INSTALL drivers/bluetooth/btusb.ko
  INSTALL drivers/char/nvram.ko
  INSTALL drivers/hwmon/coretemp.ko
  INSTALL drivers/i2c/i2c-mux.ko
  INSTALL drivers/md/dm-crypt.ko
  INSTALL drivers/media/usb/uvc/uvcvideo.ko
  INSTALL drivers/media/v4l2-core/v4l2-common.ko
  INSTALL drivers/media/v4l2-core/v4l2-dv-timings.ko
  INSTALL drivers/media/v4l2-core/videobuf2-core.ko
  INSTALL drivers/media/v4l2-core/videobuf2-memops.ko
  INSTALL drivers/media/v4l2-core/videobuf2-vmalloc.ko
  INSTALL drivers/media/v4l2-core/videodev.ko
  INSTALL drivers/mfd/lpc_ich.ko
  INSTALL drivers/mfd/mfd-core.ko
  INSTALL drivers/mmc/card/mmc_block.ko
  INSTALL drivers/mmc/core/mmc_core.ko
  INSTALL drivers/mmc/host/sdhci-pci.ko
  INSTALL drivers/mmc/host/sdhci.ko
  INSTALL drivers/net/ethernet/intel/e1000e/e1000e.ko
  INSTALL drivers/net/wireless/iwlwifi/dvm/iwldvm.ko
  INSTALL drivers/net/wireless/iwlwifi/iwlwifi.ko
  INSTALL drivers/platform/x86/thinkpad_acpi.ko
  INSTALL drivers/ptp/ptp.ko
  INSTALL drivers/thermal/x86_pkg_temp_thermal.ko
  INSTALL drivers/watchdog/iTCO_wdt.ko
  INSTALL fs/fuse/fuse.ko
  INSTALL fs/nls/nls_cp936.ko
  INSTALL fs/ntfs/ntfs.ko
  INSTALL lib/zlib_deflate/zlib_deflate.ko
  INSTALL net/bluetooth/bluetooth.ko
  INSTALL net/bluetooth/rfcomm/rfcomm.ko
  INSTALL net/ipv4/ah4.ko
  INSTALL net/ipv4/esp4.ko
  INSTALL net/ipv4/inet_diag.ko
  INSTALL net/ipv4/ipcomp.ko
  INSTALL net/ipv4/netfilter/ipt_MASQUERADE.ko
  INSTALL net/ipv4/netfilter/iptable_nat.ko
  INSTALL net/ipv4/netfilter/nf_log_arp.ko
  INSTALL net/ipv4/netfilter/nf_log_ipv4.ko
  INSTALL net/ipv4/netfilter/nf_nat_ipv4.ko
  INSTALL net/ipv4/netfilter/nf_nat_masquerade_ipv4.ko
  INSTALL net/ipv4/tcp_diag.ko
  INSTALL net/ipv4/udp_diag.ko
  INSTALL net/ipv4/xfrm4_mode_beet.ko
  INSTALL net/ipv4/xfrm4_mode_transport.ko
  INSTALL net/ipv4/xfrm4_mode_tunnel.ko
  INSTALL net/ipv4/xfrm4_tunnel.ko
  INSTALL net/ipv6/ipcomp6.ko
  INSTALL net/ipv6/netfilter/nf_log_ipv6.ko
  INSTALL net/ipv6/tunnel6.ko
  INSTALL net/ipv6/xfrm6_tunnel.ko
  INSTALL net/netfilter/nf_log_common.ko
  INSTALL net/netfilter/nf_nat.ko
  INSTALL net/netfilter/nf_nat_ftp.ko
  INSTALL net/netfilter/nf_nat_irc.ko
  INSTALL net/netfilter/nf_nat_sip.ko
  INSTALL net/netfilter/xt_LOG.ko
  INSTALL net/netfilter/xt_mark.ko
  INSTALL net/netfilter/xt_nat.ko
  INSTALL net/unix/unix_diag.ko
  INSTALL net/xfrm/xfrm_ipcomp.ko
  INSTALL sound/core/snd-hwdep.ko
  INSTALL sound/core/snd-pcm.ko
  INSTALL sound/pci/hda/snd-hda-codec-conexant.ko
  INSTALL sound/pci/hda/snd-hda-codec-generic.ko
  INSTALL sound/pci/hda/snd-hda-codec.ko
  INSTALL sound/pci/hda/snd-hda-controller.ko
  INSTALL sound/pci/hda/snd-hda-intel.ko
  DEPMOD  4.0.5-gentoo
depmod: WARNING: /lib/modules/4.0.5-gentoo/misc/vboxpci.ko needs unknown symbol iommu_iova_to_phys
depmod: WARNING: /lib/modules/4.0.5-gentoo/misc/vboxpci.ko needs unknown symbol kmem_cache_alloc_trace
depmod: WARNING: /lib/modules/4.0.5-gentoo/misc/vboxpci.ko needs unknown symbol iommu_present
depmod: WARNING: /lib/modules/4.0.5-gentoo/misc/vboxpci.ko needs unknown symbol iommu_detach_device
depmod: WARNING: /lib/modules/4.0.5-gentoo/misc/vboxpci.ko needs unknown symbol iommu_domain_free
depmod: WARNING: /lib/modules/4.0.5-gentoo/misc/vboxpci.ko needs unknown symbol iommu_domain_alloc
depmod: WARNING: /lib/modules/4.0.5-gentoo/misc/vboxpci.ko needs unknown symbol iommu_unmap
depmod: WARNING: /lib/modules/4.0.5-gentoo/misc/vboxpci.ko needs unknown symbol iommu_map
depmod: WARNING: /lib/modules/4.0.5-gentoo/misc/vboxpci.ko needs unknown symbol iommu_attach_device


It might be due to kernel options form Y to N or vice versa. I read some posts, and re-compile kernel again:
Code:
make clean
make modules_prepare
make -j5
make modules_install
However, this failed to solve the problem.
    1. What is the cause of this issue?
    2. How to solve this problem?
    3. When should I use make modules_prepare?
    4. When should I use emerge -av @module-rebuild
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Buffoon
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PostPosted: Sun Oct 11, 2015 12:41 pm    Post subject: Reply with quote

Did you install the new kernel image? You need to do it when you change built-in options in kernel, even if you are still using same kernel version.
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x220tux
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Joined: 09 Apr 2015
Posts: 19

PostPosted: Wed Oct 14, 2015 1:11 am    Post subject: Reply with quote

Buffoon wrote:
Did you install the new kernel image? You need to do it when you change built-in options in kernel, even if you are still using same kernel version.
yeah, I have installed it. Now getting into new kernel :P
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