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This essentially reverts commit89ff76bf9bAuthor: Chris Wilson <chris@chris-wilson.co.uk> Date: Thu Apr 2 13:42:18 2020 +0100 drm/i915/gem: Utilize rcu iteration of context engines Note that the other use of __context_engines_await have disappeard in the following commits:ccbc1b9794("drm/i915/gem: Don't allow changing the VM on running contexts (v4)")c7a71fc8ee("drm/i915: Drop getparam support for I915_CONTEXT_PARAM_ENGINES")4a766ae40e("drm/i915: Drop the CONTEXT_CLONE API (v2)") None of these have any business to optimize their engine lookup with rcu, unless extremely convincing benchmark data and a solid analysis why we can't make that workload (whatever it is that does) faster with a proper design fix. Also since there's only one caller of context_apply_all left and it's really just a loop, inline it and then inline the lopp body too. This is how all other callers that take the engine lock loop over engines, it's much simpler. Reviewed-by: Jason Ekstrand <jason@jlekstrand.net> Signed-off-by: Daniel Vetter <daniel.vetter@intel.com> Cc: Chris Wilson <chris@chris-wilson.co.uk> Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com> Cc: Daniel Vetter <daniel.vetter@ffwll.ch> Cc: Jason Ekstrand <jason@jlekstrand.net> Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com> Cc: Matthew Brost <matthew.brost@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20210810130523.1972031-1-daniel.vetter@ffwll.ch
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.