RDS: cleanup: remove "== NULL"s and "!= NULL"s in ptr comparisons

Favor "if (foo)" style over "if (foo != NULL)".

Signed-off-by: Andy Grover <andy.grover@oracle.com>
diff --git a/net/rds/message.c b/net/rds/message.c
index 9a1d67e..809656c 100644
--- a/net/rds/message.c
+++ b/net/rds/message.c
@@ -240,7 +240,7 @@
 	unsigned int i;
 
 	rm = rds_message_alloc(ceil(total_len, PAGE_SIZE), GFP_KERNEL);
-	if (rm == NULL)
+	if (!rm)
 		return ERR_PTR(-ENOMEM);
 
 	set_bit(RDS_MSG_PAGEVEC, &rm->m_flags);
@@ -284,7 +284,7 @@
 	sg_off = 0; /* Dear gcc, sg->page will be null from kzalloc. */
 
 	while (total_len) {
-		if (sg_page(sg) == NULL) {
+		if (!sg_page(sg)) {
 			ret = rds_page_remainder_alloc(sg, total_len,
 						       GFP_HIGHUSER);
 			if (ret)