xen/blkfront: Cleanup of comments, fix unaligned variables, and syntax errors.

Signed-off-by: NKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>

drivers/block/xen-blkfront.c

@@ -118,8 +118,8 @@ MODULE_PARM_DESC(max_ring_page_order, "Maximum order of pages to be used for the
 	__CONST_RING_SIZE(blkif, XEN_PAGE_SIZE * XENBUS_MAX_RING_GRANTS)
 
 /*
- * ring-ref%i i=(-1UL) would take 11 characters + 'ring-ref' is 8, so 19
- * characters are enough. Define to 20 to keep consist with backend.
+ * ring-ref%u i=(-1UL) would take 11 characters + 'ring-ref' is 8, so 19
+ * characters are enough. Define to 20 to keep consistent with backend.
  */
 #define RINGREF_NAME_LEN (20)
 /*
@@ -257,7 +257,7 @@ static int fill_grant_buffer(struct blkfront_ring_info *rinfo, int num)
 	struct grant *gnt_list_entry, *n;
 	int i = 0;
 
-	while(i < num) {
+	while (i < num) {
 		gnt_list_entry = kzalloc(sizeof(struct grant), GFP_NOIO);
 		if (!gnt_list_entry)
 			goto out_of_memory;
@@ -1968,8 +1968,7 @@ static int blkfront_resume(struct xenbus_device *dev)
 	return err;
 }
 
-static void
-blkfront_closing(struct blkfront_info *info)
+static void blkfront_closing(struct blkfront_info *info)
 {
 	struct xenbus_device *xbdev = info->xbdev;
 	struct block_device *bdev = NULL;