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358662a961
rcu_report_dead() is the last RCU word from the CPU down through the hotplug path. It is called in the idle loop right before the CPU shuts down for good. Because it removes the CPU from the grace period state machine and reports an ultimate quiescent state if necessary, no further use of RCU is allowed. Therefore it is expected that IRQs are disabled upon calling this function and are not to be re-enabled again until the CPU shuts down. Remove the IRQs disablement from that function and verify instead that it is actually called with IRQs disabled as it is expected at that special point in the idle path. Reviewed-by: Joel Fernandes (Google) <joel@joelfernandes.org> Reviewed-by: Paul E. McKenney <paulmck@kernel.org> Signed-off-by: Frederic Weisbecker <frederic@kernel.org> |
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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.