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This commit adds debugging checks to verify that the required RCU grace period has elapsed for each kvfree_rcu_bulk_data structure that arrives at the kvfree_rcu_bulk() function. These checks make use of that structure's ->gp_snap field, which has been upgraded from an unsigned long to an rcu_gp_oldstate structure. This upgrade reduces the chances of false positives to nearly zero, even on 32-bit systems, for which this structure carries 64 bits of state. Cc: Ziwei Dai <ziwei.dai@unisoc.com> 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.