Only flag sync_file_range() support for newer Linux versions

Signed-off-by: Jens Axboe <jaxboe@fusionio.com>

diff --git a/os/os-linux.h b/os/os-linux.h
index b6ba569a46f603a389a12d959b19820be801079a..df0ec2dbdb51a692cc52f93097a0238844aad1ef 100644 (file)
--- a/os/os-linux.h
+++ b/os/os-linux.h
@@ -35,9 +35,12 @@
 #define FIO_HAVE_CL_SIZE
 #define FIO_HAVE_CGROUPS
 #define FIO_HAVE_FDATASYNC
-#define FIO_HAVE_SYNC_FILE_RANGE
 #define FIO_HAVE_FS_STAT
 
+#ifdef SYNC_FILE_RANGE_WAIT_BEFORE
+#define FIO_HAVE_SYNC_FILE_RANGE
+#endif
+
 #define OS_MAP_ANON            MAP_ANONYMOUS
 
 #ifndef CLOCK_MONOTONIC