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0b549f8133
In order to let drivers use xtensa coprocessors on behalf of the calling process the kernel must handle coprocessor exceptions from the kernel mode the same way as from the user mode. This is not sufficient to allow using coprocessors transparently in IRQ or softirq context. Should such users exist they must be aware of the context and do the right thing, e.g. preserve the coprocessor state and resore it after use. Signed-off-by: Max Filippov <jcmvbkbc@gmail.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.
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.