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e4fc23bad8
The original use of KVM_X86_OP_NULL, which was to mark calls that do not follow a specific naming convention, is not in use anymore. Instead, let's mark calls that are optional because they are always invoked within conditionals or with static_call_cond. Those that are _not_, i.e. those that are defined with KVM_X86_OP, must be defined by both vendor modules or some kind of NULL pointer dereference is bound to happen at runtime. Reviewed-by: Sean Christopherson <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.