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f5dbc594b5
Currently, the check_all_holdout_tasks_trace() function removes all tasks marked with ->trc_reader_checked from the holdout list, including those with IPIs pending. This means that the IPI handler might arrive at a task that has already been removed from the list, which is at best an accident waiting to happen. This commit therefore avoids removing tasks with IPIs pending from the holdout list. This in turn means that the "if" condition in the for_each_online_cpu() loop in rcu_tasks_trace_postgp() should always evaluate to false, so a WARN_ON_ONCE() is added to check that. Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
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.