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Date: Fri, 24 Jul 2015 07:10:23 +0200
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Subject: Re: [Qemu-devel] [PATCH 0/5] replace qemu_fls() with
	pow2ceil()/pow2floor()
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To: Peter Maydell <peter.maydell@linaro.org>
Cc: Kevin Wolf <kwolf@redhat.com>, Qemu-block <qemu-block@nongnu.org>, "Michael S. Tsirkin" <mst@redhat.com>, Patch Tracking <patches@linaro.org>, QEMU Developers <qemu-devel@nongnu.org>, Keith Busch <keith.busch@intel.com>



On 23/07/2015 22:10, Peter Maydell wrote:
>> > The series looks good, but I'd prefer (especially for patch 4 which is
>> > in a fast path) if pow2ceil and pow2floor were made inline.
> Yeah, I was wondering if I was going to be asked to do that.
> Note that qemu_fls() is/was *not* inline, though, so you're
> taking an out-of-line function call on these code paths
> already.

But in patch 4 the call is only in the rare case where "l & (l - 1)" is
not zero.

Paolo