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mm,memory_hotplug: drop status_change_nid parameter from memory_notify 

There no users left of status_change_nid, so drop it from memory_notify
struct.

Link: https://lkml.kernel.org/r/20250616135158.450136-12-osalvador@suse.de
Signed-off-by: Oscar Salvador <osalvador@suse.de>
Suggested-by: David Hildenbrand <david@redhat.com>
Acked-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Harry Yoo <harry.yoo@oracle.com>
Cc: Hyeonggon Yoo <42.hyeyoo@gmail.com>
Cc: Joanthan Cameron <Jonathan.Cameron@huawei.com>
Cc: Rakie Kim <rakie.kim@sk.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Oscar Salvador 2025-06-16 15:51:54 +02:00 committed by Andrew Morton
parent 1a19c91b97
commit d2a9721d80
3 changed files with 0 additions and 12 deletions
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7
Documentation/core-api/memory-hotplug.rst
View File

@ -59,17 +59,10 @@ The third argument (arg) passes a pointer of struct memory_notify::
struct memory_notify {
unsigned long start_pfn;
unsigned long nr_pages;
int status_change_nid;
}
- start_pfn is start_pfn of online/offline memory.
- nr_pages is # of pages of online/offline memory.
- status_change_nid is set node id when N_MEMORY of nodemask is (will be)
set/clear. It means a new(memoryless) node gets new memory by online and a
node loses all memory. If this is -1, then nodemask status is not changed.
If status_changed_nid* >= 0, callback should create/discard structures for the
node if necessary.
It is possible to get notified for MEM_CANCEL_ONLINE without having been notified
for MEM_GOING_ONLINE, and the same applies to MEM_CANCEL_OFFLINE and

1
include/linux/memory.h
View File

@ -109,7 +109,6 @@ struct memory_notify {
unsigned long altmap_nr_pages;
unsigned long start_pfn;
unsigned long nr_pages;
int status_change_nid;
};
struct notifier_block;

4
mm/memory_hotplug.c
View File

@ -1153,7 +1153,6 @@ int online_pages(unsigned long pfn, unsigned long nr_pages,
struct memory_notify mem_arg = {
.start_pfn = pfn,
.nr_pages = nr_pages,
.status_change_nid = NUMA_NO_NODE,
};
struct node_notify node_arg = {
.nid = NUMA_NO_NODE,
@ -1181,7 +1180,6 @@ int online_pages(unsigned long pfn, unsigned long nr_pages,
if (!node_state(nid, N_MEMORY)) {
/* Adding memory to the node for the first time */
node_arg.nid = nid;
mem_arg.status_change_nid = nid;
ret = node_notify(NODE_ADDING_FIRST_MEMORY, &node_arg);
ret = notifier_to_errno(ret);
if (ret)
@ -1904,7 +1902,6 @@ int offline_pages(unsigned long start_pfn, unsigned long nr_pages,
struct memory_notify mem_arg = {
.start_pfn = start_pfn,
.nr_pages = nr_pages,
.status_change_nid = NUMA_NO_NODE,
};
struct node_notify node_arg = {
.nid = NUMA_NO_NODE,
@ -1975,7 +1972,6 @@ int offline_pages(unsigned long start_pfn, unsigned long nr_pages,
*/
if (nr_pages >= pgdat->node_present_pages) {
node_arg.nid = node;
mem_arg.status_change_nid = node;
ret = node_notify(NODE_REMOVING_LAST_MEMORY, &node_arg);
ret = notifier_to_errno(ret);
if (ret) {