numa: Make all callbacks of ram block notifiers optional
Let's make add/remove optional. We want to introduce a RAM block notifier for RAM migration that is only interested in resize events. Reviewed-by: Peter Xu <peterx@redhat.com> Signed-off-by: David Hildenbrand <david@redhat.com> Message-Id: <20210429112708.12291-4-david@redhat.com> Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
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				| @ -818,8 +818,11 @@ static int ram_block_notify_add_single(RAMBlock *rb, void *opaque) | ||||
| void ram_block_notifier_add(RAMBlockNotifier *n) | ||||
| { | ||||
|     QLIST_INSERT_HEAD(&ram_list.ramblock_notifiers, n, next); | ||||
| 
 | ||||
|     /* Notify about all existing ram blocks. */ | ||||
|     qemu_ram_foreach_block(ram_block_notify_add_single, n); | ||||
|     if (n->ram_block_added) { | ||||
|         qemu_ram_foreach_block(ram_block_notify_add_single, n); | ||||
|     } | ||||
| } | ||||
| 
 | ||||
| void ram_block_notifier_remove(RAMBlockNotifier *n) | ||||
| @ -832,7 +835,9 @@ void ram_block_notify_add(void *host, size_t size, size_t max_size) | ||||
|     RAMBlockNotifier *notifier; | ||||
| 
 | ||||
|     QLIST_FOREACH(notifier, &ram_list.ramblock_notifiers, next) { | ||||
|         notifier->ram_block_added(notifier, host, size, max_size); | ||||
|         if (notifier->ram_block_added) { | ||||
|             notifier->ram_block_added(notifier, host, size, max_size); | ||||
|         } | ||||
|     } | ||||
| } | ||||
| 
 | ||||
| @ -841,7 +846,9 @@ void ram_block_notify_remove(void *host, size_t size, size_t max_size) | ||||
|     RAMBlockNotifier *notifier; | ||||
| 
 | ||||
|     QLIST_FOREACH(notifier, &ram_list.ramblock_notifiers, next) { | ||||
|         notifier->ram_block_removed(notifier, host, size, max_size); | ||||
|         if (notifier->ram_block_removed) { | ||||
|             notifier->ram_block_removed(notifier, host, size, max_size); | ||||
|         } | ||||
|     } | ||||
| } | ||||
| 
 | ||||
|  | ||||
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