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f12e0d2290
Although handling a mapping request with no permissions is a trivial no-op, defer the early return until after the size/range checks so that we are consistent with other mapping requests. Signed-off-by: Keqian Zhu <zhukeqian1@huawei.com> Link: https://lore.kernel.org/r/20201207115758.9400-1-zhukeqian1@huawei.com Signed-off-by: Will Deacon <will@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.