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Now that the rcu_data structure contains ->gp_seq_needed, create an rcu_accelerate_cbs_unlocked() helper function that locklessly checks to see if new callbacks' required grace period has already been requested. If so, update the callback list locally and again locklessly. (Though interrupts must be and are disabled to avoid racing with conflicting updates in interrupt handlers.) Otherwise, call rcu_accelerate_cbs() as before. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> |
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| README | ||
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.
See Documentation/00-INDEX for a list of what is contained in each file.
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.