fsx: fix msync parameters

This explicitly sends MS_SYNC as the flag to msync() in
fsx.c, in domapwrite().  Without this flag, the memory
written to the mmap'ed region will not be flushed to disk;
in fact, on Linux, calling msync() with a '0' or MS_ASYNC
flag is a no-op.

Signed-off-by: Curt Wohlgemuth <curtw@google.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>

diff --git a/ltp/fsx.c b/ltp/fsx.c
index b36c201ed1793d9abe64b466b00cb4300cc2d99a..2f1e3e834250f357f65a138734bce3a96ef848f3 100644 (file)
--- a/ltp/fsx.c
+++ b/ltp/fsx.c
@@ -779,7 +779,7 @@ domapwrite(unsigned offset, unsigned size)
                report_failure(202);
        }
        memcpy(p + pg_offset, good_buf + offset, size);
-       if (msync(p, map_size, 0) != 0) {
+       if (msync(p, map_size, MS_SYNC) != 0) {
                prterr("domapwrite: msync");
                report_failure(203);
        }