linux-ext4 - [PATCH] xfstests: fix msync() call in fsx.c:domapwrite()

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Date:	Tue,  7 Feb 2012 11:16:06 -0800
From:	Curt Wohlgemuth <curtw@...gle.com>
To:	xfs@....sgi.com
Cc:	linux-ext4@...r.kernel.org, Curt Wohlgemuth <curtw@...gle.com>
Subject: [PATCH] xfstests: fix msync() call in fsx.c:domapwrite()

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@...gle.com>
---
 ltp/fsx.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/ltp/fsx.c b/ltp/fsx.c
index b36c201..2f1e3e8 100644
--- 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);
 	}
-- 
1.7.7.3

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