[PATCH v2 1/4] memory: Simplify memory_region_do_writeback()

["Philippe Mathieu-Daudé" <philmd@redhat.com>]

mr->dirty_log_mask tells if dirty tracking has been enabled,
not if the page is dirty. It would always be true during live
migration and when running on TCG, but otherwise it would
always be false.
As the value of mr->dirty_log_mask does not matter, remove
the check.

Cc: Beata Michalska <beata.michalska@linaro.org>
Suggested-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
---
 memory.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/memory.c b/memory.c
index 601b749906..fd5c3af535 100644
--- a/memory.c
+++ b/memory.c
@@ -2204,7 +2204,7 @@ void memory_region_do_writeback(MemoryRegion *mr, hwaddr addr, hwaddr size)
      * Might be extended case needed to cover
      * different types of memory regions
      */
-    if (mr->ram_block && mr->dirty_log_mask) {
+    if (mr->ram_block) {
         qemu_ram_writeback(mr->ram_block, addr, size);
     }
 }
-- 
2.21.3