1 files changed, 9 insertions, 0 deletions

diff --git a/arch/um/os-Linux/file.c b/arch/um/os-Linux/file.c
index c17bd6f7d674..07a750197bb0 100644
--- a/arch/um/os-Linux/file.c
+++ b/arch/um/os-Linux/file.c
@@ -266,6 +266,15 @@ int os_write_file(int fd, const void *buf, int len)
         return n;
 }
 
+int os_sync_file(int fd)
+{
+        int n = fsync(fd);
+
+        if (n < 0)
+                return -errno;
+        return n;
+}
+
 int os_file_size(const char *file, unsigned long long *size_out)
 {
         struct uml_stat buf;