recent -stable kernels have their own fallback definition of is_compat_task
#define is_compat_task() (0)
To protect against this double definition of is_compat_task we can check
to see if it is already defined, and skip the lttng variant.
(From OE-Core rev: 53db58982b7af59d75fc11b73475e9d71e6927ac)
Signed-off-by: Bruce Ashfield <bruce.ashfield@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>