Re: [PATCH] powerpc/pseries/cpuhp: fix non-NUMA build

[Christophe Leroy <christophe.leroy@csgroup.eu>]

Le 16/08/2021 à 17:17, Nathan Lynch a écrit :
> With CONFIG_NUMA unset, direct references to node_to_cpumask_map don't
> work:
> 
>     arch/powerpc/platforms/pseries/hotplug-cpu.c: In function 'pseries_cpu_hotplug_init':
>>> arch/powerpc/platforms/pseries/hotplug-cpu.c:1022:8: error: 'node_to_cpumask_map' undeclared (first use in this
>>> function)
>      1022 |        node_to_cpumask_map[node]);
> 	 |        ^~~~~~~~~~~~~~~~~~~
> 
> Use cpumask_of_node() here instead.


Isn't it the same as 
https://patchwork.ozlabs.org/project/linuxppc-dev/patch/20210816041032.2839343-1-mpe@ellerman.id.au/ ?

Christophe

> 
> Fixes: bd1dd4c5f528 ("powerpc/pseries: Prevent free CPU ids being reused on another node")
> Reported-by: kernel test robot <lkp@intel.com>
> Signed-off-by: Nathan Lynch <nathanl@linux.ibm.com>
> ---
>   arch/powerpc/platforms/pseries/hotplug-cpu.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/arch/powerpc/platforms/pseries/hotplug-cpu.c b/arch/powerpc/platforms/pseries/hotplug-cpu.c
> index 1ef40ef699a6..d646c22e94ab 100644
> --- a/arch/powerpc/platforms/pseries/hotplug-cpu.c
> +++ b/arch/powerpc/platforms/pseries/hotplug-cpu.c
> @@ -1021,7 +1021,7 @@ static int __init pseries_cpu_hotplug_init(void)
>   			/* Record ids of CPU added at boot time */
>   			cpumask_or(node_recorded_ids_map[node],
>   				   node_recorded_ids_map[node],
> -				   node_to_cpumask_map[node]);
> +				   cpumask_of_node(node));
>   		}
>   
>   		of_reconfig_notifier_register(&pseries_smp_nb);
>