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David Matlack
3255530ab1
Consolidate a bunch of code that was manually re-reading the spte if the cmpxchg failed. There is no extra cost of doing this because we already have the spte value as a result of the cmpxchg (and in fact this eliminates re-reading the spte), and none of the call sites depend on iter->old_spte retaining the stale spte value. Reviewed-by: Ben Gardon <bgardon@google.com> Reviewed-by: Peter Xu <peterx@redhat.com> Reviewed-by: Sean Christopherson <seanjc@google.com> Signed-off-by: David Matlack <dmatlack@google.com> Message-Id: <20220119230739.2234394-4-dmatlack@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.