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Since commit6060b6aec0("drm/i915/pmu: Add RC6 residency metrics"), vlv_residency_raw() may be called from an irq-disabled context (via perf event sampling on remote cpu). As such, we can no longer assume that we are called from process context and must save/restore the irq state for the spinlock. Fixes:6060b6aec0("drm/i915/pmu: Add RC6 residency metrics") Testcase: igt/perf_pmu/other-init-3 Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Chris Wilson <chris@chris-wilson.co.uk> Link: https://patchwork.freedesktop.org/patch/msgid/20171122222510.22627-1-chris@chris-wilson.co.uk Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.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.