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[Hauke <ubuntu@xxxxxxxxxx>]

I haven't tried the patch, but it looks good to me.

Am I right that all kernels shipped with ubuntu like 3.13.0-32-generic
will get the UTS_UBUNTU_RELEASE_ABI set to the ubuntu version, in this
case 32 and the mainline kernels will get it set to 0.

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https://bugs.launchpad.net/bugs/1347879

Title:
  Compile problem with external module and 031600rc5

Status in “linux” package in Ubuntu:
  In Progress
Status in “linux” source package in Trusty:
  In Progress
Status in “linux” source package in Utopic:
  In Progress

Bug description:
  In #1327619 you added UTS_UBUNTU_RELEASE_ABI which works for your ubuntu kernels. 
  I am also using the kernels from http://kernel.ubuntu.com/~kernel-ppa/mainline/ mostly for testing compatibility with mainline kernels and with your kernel  3.16.0-031600rc5-generic I am getting the following error:

    CC [M]  /home/hauke/compat-wireless/tmp/drivers/net/ethernet/atheros/alx/main.o
  In file included from /home/hauke/compat-wireless/tmp/backport-include/linux/skbuff.h:5:0,
                   from include/linux/if_ether.h:23,
                   from /home/hauke/compat-wireless/tmp/backport-include/linux/if_ether.h:3,
                   from include/uapi/linux/ethtool.h:17,
                   from include/linux/ethtool.h:16,
                   from /home/hauke/compat-wireless/tmp/backport-include/linux/ethtool.h:3,
                   from include/linux/netdevice.h:42,
                   from /home/hauke/compat-wireless/tmp/backport-include/linux/netdevice.h:3,
                   from /home/hauke/compat-wireless/tmp/drivers/net/ieee802154/fakehard.c:25:
  include/generated/utsrelease.h:2:32: error: invalid suffix "rc5" on integer constant
   #define UTS_UBUNTU_RELEASE_ABI 031600rc5
                                  ^
  /home/hauke/compat-wireless/tmp/backport-include/linux/skbuff.h:333:56: note: in expansion of macro ‘UTS_UBUNTU_RELEASE_ABI’
       !(LINUX_VERSION_CODE == KERNEL_VERSION(3,13,11) && UTS_UBUNTU_RELEASE_ABI > 30)

  
  The code in the affected line in skbuff.h:333 looks like this:
  #if LINUX_VERSION_CODE < KERNEL_VERSION(3,14,0) && \
      RHEL_RELEASE_CODE < RHEL_RELEASE_VERSION(7,0) && \
      !(LINUX_VERSION_CODE == KERNEL_VERSION(3,13,11) && UTS_UBUNTU_RELEASE_ABI > 30)
  ....
  #endif

  In the mainline kernel versions I do not need UTS_UBUNTU_RELEASE_ABI. I would suggest you add  the EXTRAVERSION into some header.
  I assume most of the APIs are changed in the ubuntu stable kernels like 3.13.11.4 and not in the kernels like 3.13.0-32 which is based on it.

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