[PATCH v2 15/18] mm/numa: Skip NUMA_NO_NODE and online nodes in numa_map_to_online_node()

Dan Williams
2019-11-17T18:00:16Z

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.kumar@linux.ibm.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
---
mm/mempolicy.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/mm/mempolicy.c b/mm/mempolicy.c
index e2d8dd21ce9d..d618121bcc17 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)) {