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a56ca5619f
The rcutorture_one_extend_check() function's second last check assumes that "preempt_count() & PREEMPT_MASK" is non-zero only if RCUTORTURE_RDR_PREEMPT or RCUTORTURE_RDR_SCHED bit is set. This works for preemptible RCU and for non-preemptible RCU running in a non-preemptible kernel. But it fails for non-preemptible RCU running in a preemptible kernel because then rcu_read_lock() is just preempt_disable(), which increases preempt count. This commit therefore adjusts this check to take into account the case fo non-preemptible RCU running in a preemptible kernel. Reviewed-by: Paul E. McKenney <paulmck@kernel.org> Signed-off-by: Boqun Feng <boqun.feng@gmail.com> |
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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 reStructuredText 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.