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c834e5e44f
Use '0' to denote an invalid pae_root instead of '0' or INVALID_PAGE. Unlike root_hpa, the pae_roots hold permission bits and thus are guaranteed to be non-zero. Having to deal with both values leads to bugs, e.g. failing to set back to INVALID_PAGE, warning on the wrong value, etc... Signed-off-by: Sean Christopherson <seanjc@google.com> Message-Id: <20210309224207.1218275-4-seanjc@google.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.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.