[PATCH] md: fix a build warning

[Firo Yang <firogm@gmail.com>]

Warning like this:

drivers/md/md.c: In function ‘update_array_info’:
drivers/md/md.c:6394:26: warning: logical not is only applied
to the left hand side of comparison [-Wlogical-not-parentheses]
      !mddev->persistent  != info->not_persistent||

I fix it by enclosing !mddev->persistent with parentheses

By the way, I also fixed a line over 80 characters warning outputed
by ./scripts/checkpatch.pl

Signed-off-by: Firo Yang <firogm@gmail.com>
---
 drivers/md/md.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/md/md.c b/drivers/md/md.c
index dd85be9..b420d82 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -6391,9 +6391,10 @@ static int update_array_info(struct mddev *mddev, mdu_array_info_t *info)
 	    mddev->ctime         != info->ctime         ||
 	    mddev->level         != info->level         ||
 /*	    mddev->layout        != info->layout        || */
-	    !mddev->persistent	 != info->not_persistent||
+	    (!mddev->persistent) != info->not_persistent ||
 	    mddev->chunk_sectors != info->chunk_size >> 9 ||
-	    /* ignore bottom 8 bits of state, and allow SB_BITMAP_PRESENT to change */
+	    /* ignore bottom 8 bits of state, and allow SB_BITMAP_PRESENT
+		to change */
 	    ((state^info->state) & 0xfffffe00)
 		)
 		return -EINVAL;
-- 
2.4.2

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