From f6db03dfb0c3d92266394c862ea9b9df10908b06 Mon Sep 17 00:00:00 2001
From: Andrew Tridgell <tridge@samba.org>
Date: Tue, 14 Jan 2014 12:40:41 +1100
Subject: [PATCH] DataFlash: don't fsync on SITL

this makes it much faster on virtual machines
---
 libraries/DataFlash/DataFlash_File.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/libraries/DataFlash/DataFlash_File.cpp b/libraries/DataFlash/DataFlash_File.cpp
index 7c5e202d64..cf14436b41 100644
--- a/libraries/DataFlash/DataFlash_File.cpp
+++ b/libraries/DataFlash/DataFlash_File.cpp
@@ -578,7 +578,9 @@ void DataFlash_File::_io_timer(void)
           chunk, ensuring the directory entry is updated after each
           write.
          */
+#if CONFIG_HAL_BOARD != HAL_BOARD_AVR_SITL
         ::fsync(_write_fd);
+#endif
         BUF_ADVANCEHEAD(_writebuf, nwritten);
     }
     perf_end(_perf_write);