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commit c37325cbd91abe3bfab280b3b09947155abe8e07 upstream. Remove dead code. LoongArch does not have a DMA memory zone (24bit DMA). The architecture does not even define MAX_DMA_PFN. Cc: stable@vger.kernel.org Reviewed-by: Mike Rapoport (Microsoft) <rppt@kernel.org> Signed-off-by: Petr Tesarik <ptesarik@suse.com> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn> 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.