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The context descriptor is stored inside the per-engine context state, as we only need to compute it once and access it frequently. However, currently only intel_lrc.c has easy access, but i915_guc_submission.c would like to frequently read it as well, and more so only ever needs the lower 32bits. Make it an inline as the compiler should be able to retrieve the value in less instructions than it takes to do the function call: add/remove: 0/1 grow/shrink: 1/0 up/down: 8/-45 (-37) function old new delta i915_guc_submit 621 629 +8 intel_lr_context_descriptor 45 - -45 Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Link: https://patchwork.freedesktop.org/patch/msgid/20170912214905.21987-1-chris@chris-wilson.co.uk Reviewed-by: Oscar Mateo <oscar.mateo@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.