linux-kernel - Re: [PATCH net-next V6 2/2] net/mlx4

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Date:	Sun, 01 Jun 2014 21:56:50 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	eric.dumazet@...il.com
Cc:	amirv@...lanox.com, ogerlitz@...lanox.com, netdev@...r.kernel.org,
	yevgenyp@...lanox.com, yuvala@...lanox.com,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH net-next V6 2/2] net/mlx4_en: Use affinity hint

From: Eric Dumazet <eric.dumazet@...il.com>
Date: Sun, 01 Jun 2014 21:37:11 -0700

> On Sun, 2014-06-01 at 21:16 -0700, Eric Dumazet wrote:
>>   CC [M]  drivers/net/ethernet/mellanox/mlx4/en_netdev.o
>> drivers/net/ethernet/mellanox/mlx4/en_netdev.c: In function ‘mlx4_en_init_affinity_hint’:
>> drivers/net/ethernet/mellanox/mlx4/en_netdev.c:1546:23: error: incompatible types when assigning to type ‘cpumask_var_t’ from type ‘void *’
>> drivers/net/ethernet/mellanox/mlx4/en_netdev.c: In function ‘mlx4_en_free_affinity_hint’:
>> drivers/net/ethernet/mellanox/mlx4/en_netdev.c:1553:41: error: incompatible types when assigning to type ‘cpumask_var_t’ from type ‘void *’
> 
> 
> And :
> 
> ERROR: "cpumask_set_cpu_local_first" [drivers/net/ethernet/mellanox/mlx4/mlx4_en.ko] undefined!
> 
> 
> $ git grep -n cpumask_set_cpu_local_first
> drivers/net/ethernet/mellanox/mlx4/en_netdev.c:1542:    if (cpumask_set_cpu_local_first(ring_idx, numa_node,
> include/linux/cpumask.h:260:int cpumask_set_cpu_local_first(int i, int numa_node, cpumask_t *dstp);
> lib/cpumask.c:168: * cpumask_set_cpu_local_first - set i'th cpu with local numa cpu's first
> lib/cpumask.c:182:int cpumask_set_cpu_local_first(int i, int numa_node, cpumask_t *dstp)
> lib/cpumask.c:228:EXPORT_SYMBOL(cpumask_set_cpu_local_first);
> 
> Fixes are needed if CONFIG_CPUMASK_OFFSTACK is not used.
> 	
> $ grep CONFIG_CPUMASK_OFFSTACK .config
> $ echo $?
> 1
> 

Indeed you have to provide a dummy version for a non-SMP build etc.

I'm reverting.