55161065d0
As this is indexed by an integer, an extensible array or extensible bitmap would be better. If/when xarray lands, we should change to use that. For now, just a simple conversion to rhashtable. When removing an entry, we need to hold rcu_read_lock() across the lookup and remove in case we race with another thread performing a removal. This means we need to use call_rcu() to free the quota info so we need an rcu_head in there, which unfortunately doubles the size of the structure. Signed-off-by: NeilBrown <neilb@suse.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.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.
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.