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8d6758527e
In memmap_init_zone, it check all pages valid or deffered by single page, then zero and init the corresponding page struct. It is safe to zero all page struct in advance at once no matter what the state of every page is. This can save time when booting kernel. Change-Id: Ieb5864231fbc751e9438be488a77ce442b91ce7b Signed-off-by: Simon Xue <xxm@rock-chips.com>
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.