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Use a temporary page and mempy_from_wc to reduce the time it takes to dump the guc log to debugfs. Signed-off-by: Chris Wilson <chris.p.wilson@intel.com> Signed-off-by: John Harrison <John.C.Harrison@Intel.com> Reviewed-by: John Harrison <John.C.Harrison@Intel.com> Reviewed-by: Alan Previn <alan.previn.teres.alexis@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20220728022028.2190627-6-John.C.Harrison@Intel.com