Re: [dpdk-dev] [PATCH] igb_uio: fix uevent montior issue

[Thomas Monjalon <thomas@monjalon.net>]

30/01/2018 11:01, Jeff Guo:
> udev could not detect remove and add event of device when hotplug in
> and out devices, that related with the fix about using pointer of
> rte_uio_pci_dev as dev_id instead of uio_device for irq device handler,
> that would result igb uio irq failure when kernel version after than 3.17.
> so this patch correct it by use kernel version check before handle the
> pci interrupt.
> 
> Fixes: 6b9ed026a870 ("igb_uio: fix build with kernel <= 3.17")
> Signed-off-by: Jeff Guo <jia.guo@intel.com>
> ---
> +#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 17, 0)
>  	struct rte_uio_pci_dev *udev = (struct rte_uio_pci_dev *)dev_id;
>  	struct uio_info *info = &udev->info;
> -
> +#else
> +	struct uio_device *idev = (struct uio_device *)dev_id;
> +	struct uio_info *info = idev->info;
> +	struct rte_uio_pci_dev *udev = info->priv;
> +#endif

Can we avoid checking Linux version number?
This method won't work with kernel backports.