39d0099f94
Currently, neither the vio_bus or vio_driver structures provide support for a shutdown() routine. Add support for shutdown() by allowing drivers to provide a implementation via function pointer in their vio_driver struct and provide a proper implementation in the driver template for the vio_bus that calls a vio drivers shutdown() if defined. In the case that no shutdown() is defined by a vio driver and a kexec is in progress we implement a big hammer that calls remove() to ensure no further DMA for the devices is possible. Signed-off-by: Tyrel Datwyler <tyreld@linux.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20210402001325.939668-1-tyreld@linux.ibm.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.