migration: update comments of migration bitmap

Since the ram bitmap and the unsent bitmap are split by RAMBlock
in commit 6b6712e, it's better to update the comments about them.

Signed-off-by: Yi Wang <wang.yi59@zte.com.cn>
Message-Id: <1555311089-18610-1-git-send-email-wang.yi59@zte.com.cn>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>

diff --git a/migration/ram.c b/migration/ram.c
index ec11161d585488232843cc100ef492c1d0ef51be..e1fe45311d21db8b3a283e842c53a2d5d84f23f3 100644 (file)
--- a/migration/ram.c
+++ b/migration/ram.c
@@ -1630,8 +1630,6 @@ static int save_xbzrle_page(RAMState *rs, uint8_t **current_data,
 /**
  * migration_bitmap_find_dirty: find the next dirty page from start
  *
- * Called with rcu_read_lock() to protect migration_bitmap
- *
  * Returns the byte offset within memory region of the start of a dirty page
  *
  * @rs: current RAM state
@@ -2681,7 +2679,7 @@ static void ram_save_cleanup(void *opaque)
     RAMBlock *block;
 
     /* caller have hold iothread lock or is in a bh, so there is
-     * no writing race against this migration_bitmap
+     * no writing race against the migration bitmap
      */
     memory_global_dirty_log_stop();