[PATCH] mm: Use kcalloc instead of kzalloc to allocate array

[Thomas Meyer]

The advantage of kcalloc is, that will prevent integer overflows which could
result from the multiplication of number of elements and size and it is also
a bit nicer to read.

The semantic patch that makes this change is available
in https://lkml.org/lkml/2011/11/25/107

Signed-off-by: Thomas Meyer <thomas@xxxxxxxx>
---

diff -u -p a/mm/vmalloc.c b/mm/vmalloc.c
--- a/mm/vmalloc.c 2011-11-28 19:36:48.210120310 +0100
+++ b/mm/vmalloc.c 2011-11-28 20:06:49.925235983 +0100
@@ -2348,8 +2348,8 @@ struct vm_struct **pcpu_get_vm_areas(con
 		return NULL;
 	}
 
-	vms = kzalloc(sizeof(vms[0]) * nr_vms, GFP_KERNEL);
-	vas = kzalloc(sizeof(vas[0]) * nr_vms, GFP_KERNEL);
+	vms = kcalloc(nr_vms, sizeof(vms[0]), GFP_KERNEL);
+	vas = kcalloc(nr_vms, sizeof(vas[0]), GFP_KERNEL);
 	if (!vas || !vms)
 		goto err_free;
 
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