Google fail. I'd like to go back to my 32b machine and try to reproduce this. your patch seems fine to me though.
-------- Original message -------- Subject: Re: [PATCH] drm/i915: rc6 residency (fix the fix) From: Chris Wilson <ch...@chris-wilson.co.uk> To: Ben Widawsky <b...@bwidawsk.net> CC: intel-gfx@lists.freedesktop.org,Ben Widawsky <benjamin.widaw...@intel.com> On Sun, 22 Apr 2012 11:02:32 -0700, Ben Widawsky <b...@bwidawsk.net> wrote: > Does div_round64 work for you? I think that is the best solution. Only exists in drivers/cpuidle/governors/menu.c, and still would need a do_div to avoid the subsequent 64-bit division. The choice appears to be either perform the divide by 1000 using do_div, or note that a u32 * 128 / 1000 is also a u32 and so cast the result of DIV_ROUND_UP_ULL back to u32. -Chris -- Chris Wilson, Intel Open Source Technology Centre
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