From: Paolo Abeni <[email protected]>
Date: Tue, 24 Oct 2017 12:41:01 +0200
> Since commit 0da4af00b2ed ("ipv6: only update __use and lastusetime
> once per jiffy at most"), updating the dst lastuse field is an
> unlikely action: it happens at most once per jiffy, out of
> potentially millions of calls per second.
>
> Mark explicitly the code as such, and let the compiler generate
> better code.
>
> Note: gcc 7.2 and several older versions do actually generate
> different - better - code when the unlikely() hint is in place,
> avoid jump in the fast path and keeping better code locality.
>
> Signed-off-by: Paolo Abeni <[email protected]>
Applied, thanks.
