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[ Upstream commit ad6b5b73ff565e88aca7a7d1286788d80c97ba71 ] rcu_all_qs() is defined for !CONFIG_PREEMPT_RCU but the declaration is conditioned on CONFIG_PREEMPTION. With CONFIG_PREEMPT_LAZY, CONFIG_PREEMPTION=y does not imply CONFIG_PREEMPT_RCU=y. Decouple the two. Cc: Paul E. McKenney <paulmck@kernel.org> Reviewed-by: Frederic Weisbecker <frederic@kernel.org> Reviewed-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Ankur Arora <ankur.a.arora@oracle.com> Signed-off-by: Paul E. McKenney <paulmck@kernel.org> Signed-off-by: Boqun Feng <boqun.feng@gmail.com> Signed-off-by: Sasha Levin <sashal@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.