Assemble/Incremental: don't hold O_EXCL on mddev after assembly.

As soon as the array is assembled, udev or systemd might run
fsck and mount it.  So we need to drop O_EXCL promptly.

Signed-off-by: NeilBrown <neilb@suse.de>

1 files changed, 1 insertions, 0 deletions

diff --git a/Assemble.c b/Assemble.c
index 44e905bb..7e8e7957 100644
--- a/Assemble.c
+++ b/Assemble.c
@@ -1037,6 +1037,7 @@ static int start_array(int mdfd,
 		} else
 #endif
 			rv = ioctl(mdfd, RUN_ARRAY, NULL);
+		reopen_mddev(mdfd); /* drop O_EXCL */
 		if (rv == 0) {
 			if (c->verbose >= 0) {
 				pr_err("%s has been started with %d drive%s",