[PATCH v6 03/13] mm/demotion: Return error on write to numa_demotion sysfs

Aneesh Kumar K.V
2022-06-10T13:54:30Z

With CONFIG_MIGRATION disabled return EINVAL on write.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
---
mm/memory-tiers.c | 3 +++
1 file changed, 3 insertions(+)

diff --git a/mm/memory-tiers.c b/mm/memory-tiers.c
index 9c6b40d7e0bf..c3123a457d90 100644
--- a/mm/memory-tiers.c
+++ b/mm/memory-tiers.c
@@ -105,6 +105,9 @@ static ssize_t numa_demotion_enabled_store(struct kobject *kobj,
{
ssize_t ret;

+ if (!IS_ENABLED(CONFIG_MIGRATION))
+ return -EINVAL;
+
ret = kstrtobool(buf, &numa_demotion_enabled);
if (ret)
return ret;
--
2.36.1