avoid helpful cleanup patches.

Cc: "Stephen M. Cameron" <scameron@beardog.cce.hp.com>
Cc: James Bottomley <James.Bottomley@HansenPartnership.com>
Cc: Jens Axboe <jens.axboe@oracle.com>
Cc: Mike Miller <mikem@beardog.cce.hp.com>
Cc: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

drivers/scsi/hpsa.c

@@ -214,7 +214,7 @@ static inline int is_logical_dev_addr_mode(unsigned char scsi3addr[])
 static const char *raid_label[] = { "0", "4", "1(1+0)", "5", "5+1", "ADG",
 	"UNKNOWN"
 };
-#define RAID_UNKNOWN (sizeof(raid_label) / sizeof(raid_label[0]) - 1)
+#define RAID_UNKNOWN (ARRAY_SIZE(raid_label) - 1)
 
 static ssize_t raid_level_show(struct device *dev,
 	     struct device_attribute *attr, char *buf)