From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Guo, Jia" <jia.guo@intel.com>
Subject: Re: [PATCH] igb_uio: fix uevent montior issue
Date: Mon, 12 Feb 2018 16:28:21 +0800
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Cc: dev@dpdk.org, jingjing.wu@intel.com, jianfeng.tan@intel.com
To: Thomas Monjalon <thomas@monjalon.net>, ferruh.yigit@intel.com
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On 2/9/2018 6:01 AM, Thomas Monjalon wrote:
> 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.
i don't think that is a bug rather than a kernel feature parameter 
change , so i am not sure if it will definitely a chance exist for the 
kernel backport fix for that.