a3ca27c405
The identity mapping position in virtual memory is randomized together with the kernel mapping. That position can never overlap with the lowcore even when the lowcore is relocated. Prevent overlapping with the lowcore to allow independent positioning of the identity mapping. With the current value of the alternative lowcore address of 0x70000 the overlap could happen in case the identity mapping is placed at zero. This is a prerequisite for uncoupling of randomization base of kernel image and identity mapping in virtual memory. Acked-by: Vasily Gorbik <gor@linux.ibm.com> Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com> Signed-off-by: Vasily Gorbik <gor@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 reStructuredText 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.