netdev - Re: [PATCH net-next v2] cpumask: make cpumask_next

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Date:   Mon, 13 Aug 2018 08:58:49 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     willemdebruijn.kernel@...il.com
Cc:     netdev@...r.kernel.org, caleb.raitto@...il.com, lkp@...el.com,
        willemb@...gle.com
Subject: Re: [PATCH net-next v2] cpumask: make cpumask_next_wrap available
 without smp

From: Willem de Bruijn <willemdebruijn.kernel@...il.com>
Date: Sun, 12 Aug 2018 09:14:03 -0400

> From: Willem de Bruijn <willemb@...gle.com>
> 
> The kbuild robot shows build failure on machines without CONFIG_SMP:
> 
>   drivers/net/virtio_net.c:1916:10: error:
>     implicit declaration of function 'cpumask_next_wrap'
> 
> cpumask_next_wrap is exported from lib/cpumask.o, which has
> 
>     lib-$(CONFIG_SMP) += cpumask.o
> 
> same as other functions, also define it as static inline in the
> NR_CPUS==1 branch in include/linux/cpumask.h.
> 
> If wrap is true and next == start, return nr_cpumask_bits, or 1.
> Else wrap across the range of valid cpus, here [0].
> 
> Fixes: 2ca653d607ce ("virtio_net: Stripe queue affinities across cores.")
> Signed-off-by: Willem de Bruijn <willemb@...gle.com>

Applied, thanks Willem.