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register_nmi_handler() can be called from PREEMPT_RT atomic context (e.g. wakeup_cpu_via_init_nmi() or native_stop_other_cpus()), and thus ordinary spinlocks cannot be used. Signed-off-by: Scott Wood <swood@redhat.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Don Zickus <dzickus@redhat.com> Link: http://lkml.kernel.org/r/20170724213242.27598-1-swood@redhat.com
Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. 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.