672e547610
In practice, in order to do cached decompression rather than reuse them for in-place decompression and make full use of pages in page_pool instead of allocating as much as possible, an unallocated placeholder was introduce to mark all in compressed_pages[] and they will be replaced at the time of submission. Previously EROFS_UNALLOCATED_CACHED_PAGE was included in internal.h, which is unnecessary since it's only internally used in decompression subsystem, move it to unzip_vle.c and rename it to PAGE_UNALLOCATED. Reviewed-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Gao Xiang <gaoxiang25@huawei.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.
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.