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[PATCH v1 04/13] numa: Make all callbacks of ram block notifiers optiona


From: David Hildenbrand
Subject: [PATCH v1 04/13] numa: Make all callbacks of ram block notifiers optional
Date: Wed, 19 Feb 2020 17:17:16 +0100

Let's make add/remove optional. We want to introduce a RAM block
notifier for RAM migration, that's only interested in resizes.

Cc: Richard Henderson <address@hidden>
Cc: Paolo Bonzini <address@hidden>
Cc: Eduardo Habkost <address@hidden>
Cc: Marcel Apfelbaum <address@hidden>
Cc: Peter Xu <address@hidden>
Signed-off-by: David Hildenbrand <address@hidden>
---
 hw/core/numa.c | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/hw/core/numa.c b/hw/core/numa.c
index e28ad24fcd..4270b268c8 100644
--- a/hw/core/numa.c
+++ b/hw/core/numa.c
@@ -915,8 +915,11 @@ 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)
@@ -929,7 +932,9 @@ 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);
+        }
     }
 }
 
@@ -938,7 +943,9 @@ 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);
+        }
     }
 }
 
-- 
2.24.1




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