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[ Upstream commitbd9dcef67f] Fix build error in x86/xen/ when PARAVIRT_SPINLOCKS is not enabled. Fixes this build error: ../arch/x86/xen/smp_hvm.c: In function ‘xen_hvm_smp_init’: ../arch/x86/xen/smp_hvm.c:77:3: error: ‘nopvspin’ undeclared (first use in this function) nopvspin = true; Fixes:3d7746bea9("x86/xen: Fix xen_hvm_smp_init() when vector callback not available") Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Reviewed-by: Juergen Gross <jgross@suse.com> Cc: David Woodhouse <dwmw@amazon.co.uk> Cc: Juergen Gross <jgross@suse.com> Link: https://lore.kernel.org/r/20210115191123.27572-1-rdunlap@infradead.org Signed-off-by: Juergen Gross <jgross@suse.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
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.