dm btree spine: eliminate duplicate le32_to_cpu() in node_check()

Signed-off-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>

drivers/md/persistent-data/dm-btree-spine.c

@@ -36,7 +36,7 @@ static int node_check(struct dm_block_validator *v,
 	struct node_header *h = &n->header;
 	size_t value_size;
 	__le32 csum_disk;
-	uint32_t flags;
+	uint32_t flags, nr_entries, max_entries;
 
 	if (dm_block_location(b) != le64_to_cpu(h->blocknr)) {
 		DMERR_LIMIT("node_check failed: blocknr %llu != wanted %llu",
@@ -53,15 +53,17 @@ static int node_check(struct dm_block_validator *v,
 		return -EILSEQ;
 	}
 
+	nr_entries = le32_to_cpu(h->nr_entries);
+	max_entries = le32_to_cpu(h->max_entries);
 	value_size = le32_to_cpu(h->value_size);
 
 	if (sizeof(struct node_header) +
-	    (sizeof(__le64) + value_size) * le32_to_cpu(h->max_entries) > block_size) {
+	    (sizeof(__le64) + value_size) * max_entries > block_size) {
 		DMERR_LIMIT("node_check failed: max_entries too large");
 		return -EILSEQ;
 	}
 
-	if (le32_to_cpu(h->nr_entries) > le32_to_cpu(h->max_entries)) {
+	if (nr_entries > max_entries) {
 		DMERR_LIMIT("node_check failed: too many entries");
 		return -EILSEQ;
 	}