Once the linux build directory has been determined ($LINUX_DIR), try and

Once the linux build directory has been determined ($LINUX_DIR), try and
override the previous setting of the LINUX_KERNEL_RELEASE variable using
the release info from the Linux build directory.  Information comes from
the UTS_RELEASE C macro.  For kernel versions 2.6.18 and later this is
defined in include/linux/utsrelease.h.  For earlier kernel versions it is
defined in include/linux/version.h.