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[ Upstream commit448b5a1548] Currently, vmap()s are avoided if physical addresses are consecutive for decompressed buffers. I observed that is very common for 4KiB pclusters since the numbers of decompressed pages are almost 2 or 3. However, such detection doesn't work for Highmem pages on 32-bit machines, let's fix it now. Reported-by: Liu Jinbao <liujinbao1@xiaomi.com> Fixes:7fc45dbc93("staging: erofs: introduce generic decompression backend") Link: https://lore.kernel.org/r/20220708101001.21242-1-hsiangkao@linux.alibaba.com Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com> Signed-off-by: Sasha Levin <sashal@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.