[PATCH v6 07/10] drivers,hmat: Use node-notifier instead of memory-notifier

Oscar Salvador
2025-06-09T09:22:13Z

hmat driver is only concerned when a numa node changes its memory state,
specifically when a numa node with memory comes into play for the first
time, because it will register the memory_targets belonging to that numa
node.
So stop using the memory notifier and use the new numa node notifer
instead.

Signed-off-by: Oscar Salvador <osalvador@suse.de>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Harry Yoo <harry.yoo@oracle.com>
Reviewed-by: Vlastimil Babka <vbabka@suse.cz>
---
drivers/acpi/numa/hmat.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/acpi/numa/hmat.c b/drivers/acpi/numa/hmat.c
index 9d9052258e92..4958301f5417 100644
--- a/drivers/acpi/numa/hmat.c
+++ b/drivers/acpi/numa/hmat.c
@@ -962,10 +962,10 @@ static int hmat_callback(struct notifier_block *self,
unsigned long action, void *arg)
{
struct memory_target *target;
- struct memory_notify *mnb = arg;
- int pxm, nid = mnb->status_change_nid;
+ struct node_notify *nn = arg;
+ int pxm, nid = nn->nid;

- if (nid == NUMA_NO_NODE || action != MEM_ONLINE)
+ if (action != NODE_ADDED_FIRST_MEMORY)
return NOTIFY_OK;

pxm = node_to_pxm(nid);
@@ -1118,7 +1118,7 @@ static __init int hmat_init(void)
hmat_register_targets();

/* Keep the table and structures if the notifier may use them */
- if (hotplug_memory_notifier(hmat_callback, HMAT_CALLBACK_PRI))
+ if (hotplug_node_notifier(hmat_callback, HMAT_CALLBACK_PRI))
goto out_put;

if (!hmat_set_default_dram_perf())
--
2.49.0