Probe for fdatasync()

Signed-off-by: Blue Swirl <blauwirbel@gmail.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/cutils.c b/cutils.c
index 7a2234646..2365e68d9 100644
--- a/cutils.c
+++ b/cutils.c
@@ -124,7 +124,7 @@ int qemu_fls(int i)
  */
 int qemu_fdatasync(int fd)
 {
-#ifdef _POSIX_SYNCHRONIZED_IO
+#ifdef CONFIG_FDATASYNC
     return fdatasync(fd);
 #else
     return fsync(fd);