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There is no requirement for doing the PCODE request polling atomically, so do that only for a short time switching to sleeping poll afterwards. The specification requires a 150usec timeout for the change notification, so let's use that for the atomic poll. Do the extra 2ms poll - needed as a workaround on BXT/GLK - in sleeping mode. v2: - rebase on v2 of patchset dropping the sandybridge_pcode_read/write refactoring (Chris) Cc: Chris Wilson <chris@chris-wilson.co.uk> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Signed-off-by: Imre Deak <imre.deak@intel.com> Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk> Link: https://patchwork.freedesktop.org/patch/msgid/20180130142939.17983-2-imre.deak@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.