[dpdk-dev] [PATCH v7 5/6] igb_uio: use kernel functions for masking MSI-X

Ferruh Yigit ferruh.yigit at intel.com
Thu Oct 12 22:58:38 CEST 2017

On 10/12/2017 11:50 AM, Kavanagh, Mark B wrote:
> Hi,
> This commit renders igb_uio unusable on Fedora 20, kernel version 3.19.8-100.fc20.x86_64.
> During the build (make -j 20), a warning is issued for igb_uio regarding a missing symbol (pci_msi_unmask):
> 	WARNING: "pci_msi_unmask_irq" [/home/<redacted>/x86_64-native-linuxapp-gcc/build/lib/librte_eal/linuxapp/igb_uio/igb_uio.ko] undefined!
> 	WARNING: "pci_msi_mask_irq" [/home/<redacted>/x86_64-native-linuxapp-gcc/build/lib/librte_eal/linuxapp/igb_uio/igb_uio.ko] undefined!

Hi Mark,

I can see vanilla 3.19.8 has pci_msi_unmask_irq and pci_msi_mask_irq.

Also I checked Fedora 3.19.8-100.fc20.x86_64 source code, they are still

Not sure why getting this error.

> Subsequently, the module is may not be loaded on account of same.
> (from dmesg): 
> 	[673425.712110] igb_uio: Unknown symbol pci_msi_unmask_irq (err 0)
> 	[673425.712124] igb_uio: Unknown symbol pci_msi_mask_irq (err 0)
> Thanks,
> Mark

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