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-rw-r--r--include/exec/memory.h3
-rw-r--r--memory.c1
2 files changed, 2 insertions, 2 deletions
diff --git a/include/exec/memory.h b/include/exec/memory.h
index b61c84f62a..7b0929d54f 100644
--- a/include/exec/memory.h
+++ b/include/exec/memory.h
@@ -647,8 +647,7 @@ void memory_region_ram_resize(MemoryRegion *mr, ram_addr_t newsize,
  *
  * @mr: the memory region being updated.
  * @log: whether dirty logging is to be enabled or disabled.
- * @client: the user of the logging information; %DIRTY_MEMORY_MIGRATION or
- *          %DIRTY_MEMORY_VGA.
+ * @client: the user of the logging information; %DIRTY_MEMORY_VGA only.
  */
 void memory_region_set_log(MemoryRegion *mr, bool log, unsigned client);
 
diff --git a/memory.c b/memory.c
index 03c536b857..a8f8599079 100644
--- a/memory.c
+++ b/memory.c
@@ -1425,6 +1425,7 @@ void memory_region_set_log(MemoryRegion *mr, bool log, unsigned client)
 {
     uint8_t mask = 1 << client;
 
+    assert(client == DIRTY_MEMORY_VGA);
     memory_region_transaction_begin();
     mr->dirty_log_mask = (mr->dirty_log_mask & ~mask) | (log * mask);
     memory_region_update_pending |= mr->enabled;