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610b818856
With the introduction of exchange_tids thread_group_leader and has_group_leader_pid have become equivalent. Further at this point in the code a thread group has exactly two threads, the previous thread_group_leader that is waiting to be reaped and tsk. So we know it is impossible for tsk to be the thread_group_leader. This is also the last user of has_group_leader_pid so removing this check will allow has_group_leader_pid to be removed. So remove the "BUG_ON(has_group_leader_pid)" that will never fire. Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.