On 05/18/2015 08:06 PM, Christian König wrote:
> I'm actually surprised how often people come along with that. The last time
> we tried this it caused a noticeable performance drop.
>
> Basic problem is that this line:
>> + if ((reg < rdev->rmmio_size || reg < RADEON_MIN_MMIO_SIZE) &&
>> !always_indirect)
> optimizes away in most of the cases which reduces the call to a readl which
> is way faster than the spinlock path.
>
> So this is a NAK,
Fair enough.
I'm preparing a v2 where the fast branch of r100_mm_{r,w}reg() will stay
inlined.
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