Dan Williams <dan.j.willi...@intel.com> writes:

> Update numa_map_to_online_node() to stop falling back to numa node 0
> when the input is NUMA_NO_NODE. Also, skip the lookup if @node is
> online. This makes the routine compatible with other arch node mapping
> routines.
>
> Reported-by: Aneesh Kumar K.V <aneesh.ku...@linux.ibm.com>
> Reviewed-by: Aneesh Kumar K.V <aneesh.ku...@linux.ibm.com>
> Link: 
> https://lore.kernel.org/r/157401275716.43284.13185549705765009174.st...@dwillia2-desk3.amr.corp.intel.com
> Signed-off-by: Dan Williams <dan.j.willi...@intel.com>
> ---
>  mm/mempolicy.c |    4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/mm/mempolicy.c b/mm/mempolicy.c
> index 4cff069279f6..30d76db718bf 100644
> --- a/mm/mempolicy.c
> +++ b/mm/mempolicy.c
> @@ -137,8 +137,8 @@ int numa_map_to_online_node(int node)
>  {
>       int min_node;
>  
> -     if (node == NUMA_NO_NODE)
> -             node = 0;
> +     if (node == NUMA_NO_NODE || node_online(node))
> +             return node;
>  
>       min_node = node;
>       if (!node_online(node)) {


The above if condition will always be true?

-aneesh
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