lib/genalloc.c: convert kmalloc_node(...GFP_ZERO...) to kzalloc_node(...)

Use the helper function instead of __GFP_ZERO.
Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

lib/genalloc.c

@@ -187,7 +187,7 @@ int gen_pool_add_virt(struct gen_pool *pool, unsigned long virt, phys_addr_t phy
 	int nbytes = sizeof(struct gen_pool_chunk) +
 				BITS_TO_LONGS(nbits) * sizeof(long);
 
-	chunk = kmalloc_node(nbytes, GFP_KERNEL | __GFP_ZERO, nid);
+	chunk = kzalloc_node(nbytes, GFP_KERNEL, nid);
 	if (unlikely(chunk == NULL))
 		return -ENOMEM;