From: Alexander Duyck <alexander.du...@gmail.com>
Date: Fri, 24 Mar 2017 09:38:03 -0700

> From: Alexander Duyck <alexander.h.du...@intel.com>
> 
> This change basically codifies what I think was already the limitations on
> the busy_poll and busy_read sysctl interfaces.  We weren't checking the
> lower bounds and as such could input negative values. The behavior when
> that was used was dependent on the architecture. In order to prevent any
> issues with that I am just disabling support for values less than 0 since
> this way we don't have to worry about any odd behaviors.
> 
> By limiting the sysctl values this way it also makes it consistent with how
> we handle the SO_BUSY_POLL socket option since the value appears to be
> reported as a signed integer value and negative values are rejected.
> 
> Signed-off-by: Alexander Duyck <alexander.h.du...@intel.com>

Applied, thanks.

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