Remove cast for kmalloc return value

remove cast for kmalloc return value.

Signed-off-by: Zhang Yanfei <zhangyanfei@cn.fujitsu.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
diff --git a/arch/ia64/kernel/mca_drv.c b/arch/ia64/kernel/mca_drv.c
index 9392e02..94f8bf7 100644
--- a/arch/ia64/kernel/mca_drv.c
+++ b/arch/ia64/kernel/mca_drv.c
@@ -349,7 +349,7 @@
 
 	/* - 3 - */
 	slidx_pool.max_idx = (rec_max_size/sect_min_size) * 2 + 1;
-	slidx_pool.buffer = (slidx_list_t *)
+	slidx_pool.buffer =
 		kmalloc(slidx_pool.max_idx * sizeof(slidx_list_t), GFP_KERNEL);
 
 	return slidx_pool.buffer ? 0 : -ENOMEM;