diff --git a/drivers/dma/sh/shdma-base.c b/drivers/dma/sh/shdma-base.c
index 7f72b3f4cd1a..0a2eb5f5a6e8 100644
--- a/drivers/dma/sh/shdma-base.c
+++ b/drivers/dma/sh/shdma-base.c
@@ -1042,9 +1042,7 @@ EXPORT_SYMBOL(shdma_cleanup);
 
 static int __init shdma_enter(void)
 {
-	shdma_slave_used = kcalloc(DIV_ROUND_UP(slave_num, BITS_PER_LONG),
-				   sizeof(long),
-				   GFP_KERNEL);
+	shdma_slave_used = bitmap_zalloc(slave_num, GFP_KERNEL);
 	if (!shdma_slave_used)
 		return -ENOMEM;
 	return 0;
@@ -1053,7 +1051,7 @@ module_init(shdma_enter);
 
 static void __exit shdma_exit(void)
 {
-	kfree(shdma_slave_used);
+	bitmap_free(shdma_slave_used);
 }
 module_exit(shdma_exit);